chore: downgrade electron builder => 20.14.7 (#741 )

* chore: downgrade electron builder => 20.14.7 * chore: downgrade electron builder => 20.8.1
Bump Agent version to 1.2.7 and update changelog.
2018-07-26 23:30:20 +02:00 · 2018-07-26 22:20:28 +02:00 · 2018-07-26 22:16:33 +02:00 · 2018-07-26 22:15:21 +02:00 · 2018-07-26 22:06:32 +02:00 · 2018-07-26 06:04:47 +02:00
220 changed files with 12867 additions and 9369 deletions
--- a/.nvmrc
+++ b/.nvmrc
@@ -1 +1 @@
-8.9.4
+8.11.2
--- a/.travis.yml
+++ b/.travis.yml
@@ -11,7 +11,7 @@ matrix:
  fast_finish: true
  include:
    - os: osx
-      osx_image: xcode8.3
+      osx_image: xcode9.3beta
    - os: linux
      env: CC=clang CXX=clang++ npm_config_clang=1
      compiler: clang
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,7 +6,131 @@ The format is loosely based on [Keep a Changelog](http://keepachangelog.com/en/1

 Every Agent version includes the most recent firmware version. See the [firmware changelog](https://github.com/UltimateHackingKeyboard/firmware/blob/master/CHANGELOG.md).

-## [1.1.1] - 2017-02-13
+## [1.2.7] - 2018-07-26
+
+Firmware: 8.4.0 [[release](https://github.com/UltimateHackingKeyboard/firmware/releases/tag/v8.4.0)] | Device Protocol: 4.4.0 | User Config: 4.0.1 | Hardware Config: 1.0.0
+
+- Fix Agent startup exception on Linux by upgrading Electron builder.
+- Change the shortcut which enables the USB stack test code, so that it can be triggered with the default Mac US keymap.
+
+## [1.2.6] - 2018-07-26
+
+Firmware: 8.**4.0** [[release](https://github.com/UltimateHackingKeyboard/firmware/releases/tag/v8.4.0)] | Device Protocol: 4.**4.0** | User Config: 4.0.1 | Hardware Config: 1.0.0
+
+- Replace the Linux blhost binary with a statically compiled version that doesn't use special instructions and shouldn't segfault.
+- Keep the current layer when changing keymaps.
+- Fix the sleep key of Mac keymaps.
+- Add help page.
+- Add "save to keyboard" and "remap key" shortcuts.
+- Build only AppImages for Linux.
+- Replace ng2-select2 widgets with ngx-select-ex that always shows up in the correct position.
+- Improve the phrasing of the firmware update error message.
+- Tweak unsupported Windows firmware update notification.
+- Hide the Settings menu until auto update is implemented.
+- Don't scroll when the macro tab of the key action popover gets selected.
+- Add keyboard shortcut for enabling the USB stack test mode of the firmware. `DEVICEPROTOCOL:MINOR`
+- Tone down the color of the separator line.
+
+## [1.2.5] - 2018-06-26
+
+Firmware: 8.2.5 [[release](https://github.com/UltimateHackingKeyboard/firmware/releases/tag/v8.2.5)] | Device Protocol: 4.3.1 | User Config: 4.0.1 | Hardware Config: 1.0.0
+
+- When remapping a switch keymap action on all keymaps, don't set it on its own keymap.
+- Make the key action popover always contain the action of the current key, even after cancelled.
+- Include the firmware version to be updated to the firmware update log.
+- Update the Agent icon of the side menu and the about page.
+- When remapping a key, only flash the affected key instead of all keys.
+- Fade in/out the keyboard separator line only when splitting the keyboard.
+- Only show the unsupported OS message of the firmware page on relevant Windows versions.
+- Close and reopen USB device when an error occurs.
+- Temporarily remove the export keymap feature because it's useless until import is implemented.
+
+## [1.2.4] - 2018-06-21
+
+Firmware: 8.2.5 [[release](https://github.com/UltimateHackingKeyboard/firmware/releases/tag/v8.2.5)] | Device Protocol: 4.3.1 | User Config: 4.0.1 | Hardware Config: 1.0.0
+
+- Replace Linux x86-64 blhost with a statically linked version which should make firmware updates work on every Linux distro.
+
+## [1.2.3] - 2018-06-19
+
+Firmware: 8.2.5 [[release](https://github.com/UltimateHackingKeyboard/firmware/releases/tag/v8.2.5)] | Device Protocol: 4.3.1 | User Config: 4.0.1 | Hardware Config: 1.0.0
+
+- Add checkboxes for remapping keys on all layers and/or all keymaps.
+- Add separator line between the keyboard halves.
+- Add double tap icon for switch layer actions.
+- Improve the looks and content of the tooltips of the key action popover.
+- Make the left keyboard half less likely to timeout during firmware update.
+- Terminate the firmware update process if blhost segfaults.
+- Replace the Linux x86-64 version of the blhost binary which should not make it segfault anymore.
+- Make the firmware update log shorter by listing one device per line and not repeating the list of available USB devices.
+- Make the firmware update help text shorter.
+
+## [1.2.2] - 2018-05-27
+
+Firmware: 8.2.**5** [[release](https://github.com/UltimateHackingKeyboard/firmware/releases/tag/v8.2.5)] | Device Protocol: 4.3.**1** | User Config: 4.0.1 | Hardware Config: 1.0.0
+
+- Offer recovery for bricked right keyboard halfs.
+- Detect when the hardware configuration of a device is invalid and display a notification. `DEVICEPROTOCOL:PATCH`
+- Check if the keyboard is in factory reset mode and if so, display a relevant instruction.
+- Only allow ASCII characters in type text macro actions.
+- Allow uploading the same file multiple times in a row.
+- Only send auto update notification when the user initiates the update.
+- Update the firmware versions on the firmware update page right after firmware updates.
+- Add a lot of useful instructions to the firmware page to help users update the firmware.
+- Add the operating system and initial device list to the firmware update log.
+- Add copy to clipboard button to the top right corner of the firmware update terminal widget.
+
+## [1.2.1] - 2018-05-12
+
+Firmware: 8.2.**2** [[release](https://github.com/UltimateHackingKeyboard/firmware/releases/tag/v8.2.2)] | Device Protocol: 4.3.0 | User Config: 4.0.**1** | Hardware Config: 1.0.0
+
+- Match for the new USB usage page and usage number. This is critical for UHKs flashed with firmware >=8.2.2 to be recognized by Agent on OSX.
+- Make the config serializer handle long media macro actions. `USERCONFIG:PATCH`
+- Add note on the macro page explaining that the macro engine of the firmware is not ready yet.
+- Add an example to the scancode tooltip to better explain users how to invoke non-US characters.
+
+## [1.2.0] - 2018-04-20
+
+Firmware: 8.**2.0** [[release](https://github.com/UltimateHackingKeyboard/firmware/releases/tag/v8.2.0)] | Device Protocol: 4.**3.0** | User Config: 4.0.0 | Hardware Config: 1.0.0
+
+- Tweak the default mouse speed. This was necessary because the last firmware version adjusted speed multipliers. The mouse speed can be reset via the "Reset speeds to default" button of the "Mouse speed" page.
+- Make the newly added switch-keymap.js script utilize the new UsbCommandId_SwitchKeymap, allowing for programmatic keymap switching. `DEVICEPROTOCOL:MINOR`
+
+## [1.1.5] - 2018-04-10
+
+Firmware: 8.1.5 [[release](https://github.com/UltimateHackingKeyboard/firmware/releases/tag/v8.1.5)] | Device Protocol: 4.2.0 | User Config: 4.0.0 | Hardware Config: 1.0.0
+
+- Don't allow to run multiple instances of Agent at the same time, but rather focus the already existing Agent window.
+
+## [1.1.4] - 2018-04-09
+
+Firmware: 8.1.5 [[release](https://github.com/UltimateHackingKeyboard/firmware/releases/tag/v8.1.5)] | Device Protocol: 4.2.0 | User Config: 4.0.0 | Hardware Config: 1.0.0
+
+- Handle privilege escalation gracefully on Linux even without PolicyKit.
+- Fix application icon path.
+- Replace application icon with a diagonal gradient based icon that should look better on desktop.
+- Make saving the configuration more robust, and add a configuration recovery screen.
+- Reposition the ISO key in the scancode list.
+
+## [1.1.3] - 2018-04-06
+
+Firmware: 8.1.**5** [[release](https://github.com/UltimateHackingKeyboard/firmware/releases/tag/v8.1.5)] | Device Protocol: 4.2.0 | User Config: 4.0.0 | Hardware Config: 1.0.0
+
+- Show the firmware versions of the left and right keyboard halves on the firmware page.
+- Fix menu scancode.
+- Make the tooltip text regarding non-US characters easier to understand.
+- On the Device Configuration page change terminology from download/upload to export/import for greater clarity.
+
+## [1.1.2] - 2018-03-09
+
+Firmware: 8.1.**4** [[release](https://github.com/UltimateHackingKeyboard/firmware/releases/tag/v8.1.4)] | Device Protocol: 4.2.0 | User Config: 4.0.0 | Hardware Config: 1.0.0
+
+- Fix the configuration serializer so that the correct key actions get serialized, and the save button always appears when needed.
+- Add instructions to the firmware page to aid users.
+- Fix code signing on OSX.
+- Sign Agent on Windows.
+
+## [1.1.1] - 2018-02-13

 Firmware: 8.1.**2** [[release](https://github.com/UltimateHackingKeyboard/firmware/releases/tag/v8.1.2)] | Device Protocol: 4.2.0 | User Config: 4.0.0 | Hardware Config: 1.0.0

@@ -20,9 +144,9 @@ Firmware: 8.1.**2** [[release](https://github.com/UltimateHackingKeyboard/firmwa
 - Assign "switch to test keymap" action on all keymaps in the default configuration.
 - Add keymap descriptions in the default configuration.

-## [1.1.0] - 2017-01-15
+## [1.1.0] - 2018-01-15

-Firmware: 8.**1**.0 [[release](https://github.com/UltimateHackingKeyboard/firmware/releases/tag/v8.1.0)] | Device Protocol: 4.2.0 | User Config: 4.0.0 | Hardware Config: 1.0.0
+Firmware: 8.**1**.0 [[release](https://github.com/UltimateHackingKeyboard/firmware/releases/tag/v8.1.0)] | Device Protocol: 4.**2.0** | User Config: 4.0.0 | Hardware Config: 1.0.0

 - Only accept device, keymap, and macro names upon editing if their trimmed length is non-zero.
 - Add diagnostics USB scripts, most notably /packages/usb/{get-i2c-health,set-i2c-baud-rate}.js, some utilizing new device protocol commands and properties. `DEVICEPROTOCOL:MINOR`
--- a/README.md
+++ b/README.md
@@ -5,17 +5,8 @@

 Agent is the configuration application of the [Ultimate Hacking Keyboard](https://ultimatehackingkeyboard.com/).

-[Give it a whirl!](http://ultimatehackingkeyboard.github.io/agent/)
-
-## Two builds to rule them all
-
-It's worth mentioning that Agent has two builds.
-
-The **electron build** is the desktop application which is meant to be used if you have an actual UHK at hand. It starts with an opening screen which detects your UHK. You cannot get past this screen without connecting a UHK via USB.
-
-The **web build** is meant to be used for demonstration purposes, so people who don't yet own a UHK can get a feel of Agent and its capabilities in their browser. Eventually, WebUSB support will be added to the web build, making it able to communicate with the UHK. Given the sandboxed nature of browsers, the web build will always lack features that the electron build offers, so this won't make the electron build obsolete.
-
-The two builds share code as much as possible.
+* Try out the [web build of Agent](http://ultimatehackingkeyboard.github.io/agent/) in your browser. This is meant to be used for demonstration purposes.
+* Download the [desktop build of Agent](https://github.com/UltimateHackingKeyboard/agent/releases) from our releases page. Use this if you have an actual UHK at hand, or else you won't get past the opening screen!

 ## Building the electron application

@@ -33,9 +24,9 @@ For everyone else, use the appropriate package manager for your OS.
 ```
 git clone git@github.com:UltimateHackingKeyboard/agent.git
 cd agent
-npm install             # to install Node dependencies
-npm run build:electron  # to build the agent
-npm run electron        # to run the newly built agent
+npm install
+npm run build
+npm run electron
 ```

 At this point, Agent should be running on your machine.
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,8 +1,11 @@
 os: unstable

+clone_folder: c:\projects\uhk-agent
+
 environment:
  GH_TOKEN:
    secure: 3IebpEKmC39codi1wT6dXx8mql4/mCL1JzZ7lir7GQ5MWRnCxlED2OXbiKHHigDV
+  CSC_LINK: c:\projects\uhk-agent\scripts\certs\windows-cert.p12
  matrix:
    - nodejs_version: "8"

--- a/build/icon.icns
+++ b/build/icon.icns
--- a/build/icon.ico
+++ b/build/icon.ico
--- a/build/icons/1024x1024.png
+++ b/build/icons/1024x1024.png
--- a/build/icons/128x128.png
+++ b/build/icons/128x128.png
--- a/build/icons/16x16.png
+++ b/build/icons/16x16.png
--- a/build/icons/24x24.png
+++ b/build/icons/24x24.png
--- a/build/icons/256x256.png
+++ b/build/icons/256x256.png
--- a/build/icons/32x32.png
+++ b/build/icons/32x32.png
--- a/build/icons/48x48.png
+++ b/build/icons/48x48.png
--- a/build/icons/512x512.png
+++ b/build/icons/512x512.png
--- a/build/icons/64x64.png
+++ b/build/icons/64x64.png
--- a/build/icons/96x96.png
+++ b/build/icons/96x96.png
--- a/package-lock.json
+++ b/package-lock.json
--- a/package.json
+++ b/package.json
@@ -3,10 +3,10 @@
  "private": true,
  "author": "Ultimate Gadget Laboratories",
  "main": "electron/dist/electron-main.js",
-  "version": "1.1.1",
-  "firmwareVersion": "8.1.2",
-  "deviceProtocolVersion": "4.2.0",
-  "userConfigVersion": "4.0.0",
+  "version": "1.2.7",
+  "firmwareVersion": "8.4.0",
+  "deviceProtocolVersion": "4.4.0",
+  "userConfigVersion": "4.0.1",
  "hardwareConfigVersion": "1.0.0",
  "description": "Agent is the configuration application of the Ultimate Hacking Keyboard.",
  "repository": {
@@ -21,34 +21,42 @@
  "devDependencies": {
    "@types/electron-devtools-installer": "2.0.2",
    "@types/electron-settings": "3.0.0",
-    "@types/fs-extra": "4.0.5",
+    "@types/fs-extra": "5.0.1",
    "@types/jasmine": "2.6.0",
+    "@types/jquery": "3.3.1",
    "@types/jsonfile": "4.0.1",
+    "@types/lodash-es": "4.17.0",
    "@types/node": "8.0.53",
    "@types/node-hid": "0.5.2",
    "@types/request": "2.0.8",
    "@types/usb": "1.1.3",
    "autoprefixer": "6.5.3",
    "buffer": "5.0.6",
+    "check-node-version": "^3.2.0",
    "copy-webpack-plugin": "4.0.1",
+    "copyfiles": "^2.0.0",
    "core-js": "2.4.1",
    "cross-env": "5.0.5",
    "decompress": "4.2.0",
-    "decompress-tarbz2": "^4.1.1",
+    "decompress-tarbz2": "4.1.1",
    "devtron": "1.4.0",
-    "electron": "1.7.11",
-    "electron-builder": "19.45.5",
-    "electron-debug": "1.4.0",
-    "electron-devtools-installer": "2.2.0",
-    "electron-log": "2.2.9",
-    "electron-rebuild": "1.6.0",
-    "electron-settings": "3.1.2",
+    "electron": "1.8.4",
+    "electron-builder": "20.8.1",
+    "electron-debug": "1.5.0",
+    "electron-devtools-installer": "2.2.3",
+    "electron-log": "2.2.16",
+    "electron-rebuild": "1.8.1",
+    "electron-settings": "3.1.4",
+    "electron-updater": "2.21.4",
    "exports-loader": "0.6.3",
    "file-loader": "0.10.0",
-    "fs-extra": "4.0.2",
+    "fs-extra": "5.0.0",
+    "gh-pages": "1.1.0",
    "jsonfile": "4.0.0",
-    "lerna": "2.0.0",
+    "lerna": "2.9.0",
+    "lodash-es": "4.17.4",
    "mkdirp": "0.5.1",
+    "node-hid": "0.5.7",
    "npm-run-all": "4.0.2",
    "pre-commit": "1.2.2",
    "request": "2.83.0",
@@ -58,9 +66,9 @@
    "svg-sprite": "1.3.7",
    "ts-loader": "2.3.1",
    "ts-node": "3.0.4",
-    "tslint": "5.5.0",
-    "typescript": "2.5.2",
-    "webpack": "2.4.1"
+    "tslint": "5.9.1",
+    "typescript": "2.6.2",
+    "webpack": "3.10.0"
  },
  "pre-commit": [
    "precommit-msg"
@@ -74,12 +82,13 @@
    "test:uhk-web": "lerna exec --scope uhk-web npm test",
    "lint": "run-s -scn lint:ts lint:style",
    "lint:ts": "run-p -sn lint:ts:electron-main lint:ts:electron-renderer lint:ts:web lint:ts:test-serializer lint:ts:uhk-usb",
-    "lint:ts:electron-main": "tslint --type-check --project ./packages/uhk-agent/tsconfig.json",
-    "lint:ts:electron-renderer": "tslint --type-check --project ./packages/uhk-web/src/tsconfig.renderer.json",
-    "lint:ts:web": "tslint --type-check --project ./packages/uhk-web/src/tsconfig.app.json",
-    "lint:ts:test-serializer": "tslint --type-check --project ./packages/test-serializer/tsconfig.json",
-    "lint:ts:uhk-usb": "tslint --type-check --project ./packages/uhk-usb/tsconfig.json",
+    "lint:ts:electron-main": "tslint --project ./packages/uhk-agent/tsconfig.json",
+    "lint:ts:electron-renderer": "tslint --project ./packages/uhk-web/src/tsconfig.renderer.json",
+    "lint:ts:web": "tslint --project ./packages/uhk-web/src/tsconfig.app.json",
+    "lint:ts:test-serializer": "tslint --project ./packages/test-serializer/tsconfig.json",
+    "lint:ts:uhk-usb": "tslint --project ./packages/uhk-usb/tsconfig.json",
    "lint:style": "stylelint \"packages/uhk-agent/src/**/*.scss\" \"packages/uhk-web/src/**/*.scss\" --syntax scss",
+    "prebuild": "check-node-version --package",
    "build": "run-s build:common build:usb build:web build:electron",
    "build:web": "lerna exec --scope uhk-web npm run build",
    "build:electron": "cross-env AOT_BUILD=true run-s -sn build:electron:renderer build:electron:main",
@@ -90,11 +99,14 @@
    "server:web": "lerna exec --scope uhk-web npm start",
    "server:electron": "lerna exec --scope uhk-web npm run server:renderer",
    "electron": "lerna exec --scope uhk-agent npm start",
+    "electron:spe": "lerna exec --scope uhk-agent npm run electron:spe",
    "standard-version": "standard-version",
    "pack": "node ./scripts/release.js",
    "sprites": "node ./scripts/generate-svg-sprites",
    "release": "node ./scripts/release.js",
-    "clean": "lerna exec rimraf ./node_modules ./dist"
+    "clean": "lerna exec rimraf ./node_modules ./dist && rimraf ./node_modules ./dist",
+    "predeploy-gh-pages": "run-s build:web",
+    "deploy-gh-pages": "gh-pages -d packages/uhk-web/dist"
  },
  "dependencies": {}
 }
--- a/packages/uhk-agent/package-lock.json
+++ b/packages/uhk-agent/package-lock.json
--- a/packages/uhk-agent/package.json
+++ b/packages/uhk-agent/package.json
@@ -17,13 +17,7 @@
    "command-line-args": "4.0.7",
    "decompress": "4.2.0",
    "decompress-bzip2": "4.0.0",
-    "electron": "1.7.9",
-    "electron-is-dev": "0.1.2",
-    "electron-log": "2.2.9",
-    "electron-rebuild": "1.6.0",
-    "electron-settings": "3.1.2",
-    "electron-updater": "2.15.0",
-    "node-hid": "0.5.4",
+    "node-hid": "0.5.7",
    "sudo-prompt": "7.0.0",
    "tmp": "0.0.33",
    "uhk-common": "^1.0.0",
@@ -36,6 +30,7 @@
  },
  "scripts": {
    "start": "electron ./dist/electron-main.js",
+    "electron:spe": "electron ./dist/electron-main.js --spe",
    "build": "webpack && npm run install:build-deps && npm run build:usb && npm run download-firmware && npm run copy-blhost",
    "build:usb": "electron-rebuild -w node-hid -p -m ./dist",
    "install:build-deps": "cd ./dist && npm i",
--- a/packages/uhk-agent/src/electron-main.ts
+++ b/packages/uhk-agent/src/electron-main.ts
@@ -2,7 +2,7 @@
 /// <reference path="./custom_types/command-line-args.d.ts"/>

 import './polyfills';
-import { app, BrowserWindow, ipcMain } from 'electron';
+import { app, BrowserWindow } from 'electron';
 import { autoUpdater } from 'electron-updater';

 import * as path from 'path';
@@ -10,7 +10,7 @@ import * as url from 'url';
 import * as commandLineArgs from 'command-line-args';
 import { UhkHidDevice, UhkOperations } from 'uhk-usb';
 // import { ElectronDataStorageRepositoryService } from './services/electron-datastorage-repository.service';
-import { LogRegExps } from 'uhk-common';
+import { CommandLineArgs, LogRegExps } from 'uhk-common';
 import { DeviceService } from './services/device.service';
 import { logger } from './services/logger.service';
 import { AppUpdateService } from './services/app-update.service';
@@ -18,13 +18,15 @@ import { AppService } from './services/app.service';
 import { SudoService } from './services/sudo.service';
 import { UhkBlhost } from '../../uhk-usb/src';
 import * as isDev from 'electron-is-dev';
-import { CommandLineInputs } from './models/command-line-inputs';

 const optionDefinitions = [
-    {name: 'addons', type: Boolean}
+    {name: 'addons', type: Boolean},
+    {name: 'spe', type: Boolean}, // simulate privilege escalation error
+    // show 'Lock layer when double tapping this key' checkbox on 'Layer' tab of the config popover
+    {name: 'layer-double-tap', type: Boolean}
 ];

-const options: CommandLineInputs = commandLineArgs(optionDefinitions);
+const options: CommandLineArgs = commandLineArgs(optionDefinitions);

 // import './dev-extension';
 // require('electron-debug')({ showDevTools: true, enabled: true });
@@ -60,7 +62,25 @@ if (console.debug) {
    };
 }

+const isSecondInstance = app.makeSingleInstance(function (commandLine, workingDirectory) {
+    // Someone tried to run a second instance, we should focus our window.
+    if (win) {
+        if (win.isMinimized()) {
+            win.restore();
+        }
+        win.focus();
+    }
+});
+
+if (isSecondInstance) {
+    app.quit();
+}
+
 function createWindow() {
+    if (isSecondInstance) {
+        return;
+    }
+
    logger.info('[Electron Main] Create new window.');
    let packagesDir;
    if (isDev) {
@@ -79,17 +99,17 @@ function createWindow() {
        webPreferences: {
            nodeIntegration: true
        },
-        icon: 'assets/images/agent-icon.png'
+        icon: path.join(__dirname, 'renderer/assets/images/agent-app-icon.png')
    });
    win.setMenuBarVisibility(false);
    win.maximize();
-    uhkHidDeviceService = new UhkHidDevice(logger);
+    uhkHidDeviceService = new UhkHidDevice(logger, options);
    uhkBlhost = new UhkBlhost(logger, packagesDir);
    uhkOperations = new UhkOperations(logger, uhkBlhost, uhkHidDeviceService, packagesDir);
-    deviceService = new DeviceService(logger, win, uhkHidDeviceService, uhkOperations);
+    deviceService = new DeviceService(logger, win, uhkHidDeviceService, uhkOperations, packagesDir);
    appUpdateService = new AppUpdateService(logger, win, app);
    appService = new AppService(logger, win, deviceService, options, uhkHidDeviceService);
-    sudoService = new SudoService(logger);
+    sudoService = new SudoService(logger, options);
    // and load the index.html of the app.

    win.loadURL(url.format({
@@ -133,13 +153,13 @@ app.on('ready', createWindow);

 // Quit when all windows are closed.
 app.on('window-all-closed', () => {
-    app.quit();
-});
-
-app.on('will-quit', () => {
    if (appUpdateService) {
        appUpdateService.saveFirtsRun();
    }
+    app.exit();
+});
+
+app.on('will-quit', () => {
 });

 app.on('activate', () => {
--- a/packages/uhk-agent/src/models/command-line-inputs.ts
+++ b/packages/uhk-agent/src/models/command-line-inputs.ts
@@ -1,3 +1,10 @@
 export interface CommandLineInputs {
+    /**
+     * addons menu visible or not
+     */
    addons?: boolean;
+    /**
+     * simulate privilege escalation error
+     */
+    spe?: boolean;
 }
--- a/packages/uhk-agent/src/models/tmp-firmware.ts
+++ b/packages/uhk-agent/src/models/tmp-firmware.ts
@@ -3,5 +3,6 @@ import { SynchrounousResult } from 'tmp';
 export interface TmpFirmware {
    rightFirmwarePath: string;
    leftFirmwarePath: string;
+    packageJsonPath: string;
    tmpDirectory: SynchrounousResult;
 }
--- a/packages/uhk-agent/src/services/app-update.service.ts
+++ b/packages/uhk-agent/src/services/app-update.service.ts
@@ -9,6 +9,9 @@ import { IpcEvents, LogService } from 'uhk-common';
 import { MainServiceBase } from './main-service-base';

 export class AppUpdateService extends MainServiceBase {
+
+    private sendAutoUpdateNotification = false;
+
    constructor(protected logService: LogService,
                protected win: Electron.BrowserWindow,
                private app: Electron.App) {
@@ -24,16 +27,21 @@ export class AppUpdateService extends MainServiceBase {

    private initListeners() {
        autoUpdater.on('checking-for-update', () => {
+            this.logService.debug('[AppUpdateService] checking for update');
            this.sendIpcToWindow(IpcEvents.autoUpdater.checkingForUpdate);
        });

        autoUpdater.on('update-available', async (ev: any, info: UpdateInfo) => {
+            this.logService.debug('[AppUpdateService] update available. Downloading started');
            await autoUpdater.downloadUpdate();
            this.sendIpcToWindow(IpcEvents.autoUpdater.updateAvailable, info);
        });

        autoUpdater.on('update-not-available', (ev: any, info: UpdateInfo) => {
-            this.sendIpcToWindow(IpcEvents.autoUpdater.updateNotAvailable, info);
+            if (this.sendAutoUpdateNotification) {
+                this.logService.debug('[AppUpdateService] update not available');
+                this.sendIpcToWindow(IpcEvents.autoUpdater.updateNotAvailable, info);
+            }
        });

        autoUpdater.on('error', (ev: any, err: string) => {
@@ -51,6 +59,7 @@ export class AppUpdateService extends MainServiceBase {
        });

        autoUpdater.on('update-downloaded', (ev: any, info: UpdateInfo) => {
+            this.logService.debug('[AppUpdateService] update downloaded');
            this.sendIpcToWindow(IpcEvents.autoUpdater.autoUpdateDownloaded, info);
        });

@@ -61,12 +70,15 @@ export class AppUpdateService extends MainServiceBase {

        ipcMain.on(IpcEvents.app.appStarted, () => {
            if (this.checkForUpdateAtStartup()) {
+                this.sendAutoUpdateNotification = false;
+                this.logService.debug('[AppUpdateService] app started. Automatically check for update.');
                this.checkForUpdate();
            }
        });

        ipcMain.on(IpcEvents.autoUpdater.checkForUpdate, () => {
            this.logService.debug('[AppUpdateService] checkForUpdate request from renderer process');
+            this.sendAutoUpdateNotification = true;
            this.checkForUpdate();
        });
    }
@@ -75,14 +87,22 @@ export class AppUpdateService extends MainServiceBase {
        if (isDev) {
            const msg = '[AppUpdateService] Application update is not working in dev mode.';
            this.logService.info(msg);
-            this.sendIpcToWindow(IpcEvents.autoUpdater.checkForUpdateNotAvailable, msg);
+
+            if (this.sendAutoUpdateNotification) {
+                this.sendIpcToWindow(IpcEvents.autoUpdater.checkForUpdateNotAvailable, msg);
+            }
+
            return;
        }

        if (this.isFirstRun()) {
            const msg = '[AppUpdateService] Application update is skipping at first run.';
            this.logService.info(msg);
-            this.sendIpcToWindow(IpcEvents.autoUpdater.checkForUpdateNotAvailable, msg);
+
+            if (this.sendAutoUpdateNotification) {
+                this.sendIpcToWindow(IpcEvents.autoUpdater.checkForUpdateNotAvailable, msg);
+            }
+
            return;
        }

--- a/packages/uhk-agent/src/services/app.service.ts
+++ b/packages/uhk-agent/src/services/app.service.ts
@@ -1,5 +1,6 @@
-import { BrowserWindow, ipcMain, shell } from 'electron';
+import { ipcMain, shell } from 'electron';
 import { UhkHidDevice } from 'uhk-usb';
+import * as os from 'os';

 import { AppStartInfo, IpcEvents, LogService } from 'uhk-common';
 import { MainServiceBase } from './main-service-base';
@@ -22,13 +23,17 @@ export class AppService extends MainServiceBase {

    private async handleAppStartInfo(event: Electron.Event) {
        this.logService.info('[AppService] getAppStartInfo');
-
+        const deviceConnectionState = this.uhkHidDeviceService.getDeviceConnectionState();
        const response: AppStartInfo = {
            commandLineArgs: {
-                addons: this.options.addons || false
+                addons: this.options.addons || false,
+                layerDoubleTap: this.options['layer-double-tap'] || false
            },
-            deviceConnected: this.uhkHidDeviceService.deviceConnected(),
-            hasPermission: this.uhkHidDeviceService.hasPermission()
+            deviceConnected: deviceConnectionState.connected,
+            hasPermission: deviceConnectionState.hasPermission,
+            bootloaderActive: deviceConnectionState.bootloaderActive,
+            platform: process.platform as string,
+            osVersion: os.release()
        };
        this.logService.info('[AppService] getAppStartInfo response:', response);
        return event.sender.send(IpcEvents.app.getAppStartInfoReply, response);
--- a/packages/uhk-agent/src/services/device.service.ts
+++ b/packages/uhk-agent/src/services/device.service.ts
@@ -1,9 +1,21 @@
 import { ipcMain } from 'electron';
-import { ConfigurationReply, DeviceConnectionState, IpcEvents, IpcResponse, LogService } from 'uhk-common';
-import { snooze, UhkHidDevice, UhkOperations } from 'uhk-usb';
+import {
+    ConfigurationReply,
+    DeviceConnectionState,
+    FirmwareUpgradeIpcResponse,
+    getHardwareConfigFromDeviceResponse,
+    HardwareModules,
+    IpcEvents,
+    IpcResponse,
+    LogService,
+    mapObjectToUserConfigBinaryBuffer,
+    SaveUserConfigurationData
+} from 'uhk-common';
+import { deviceConnectionStateComparer, snooze, UhkHidDevice, UhkOperations } from 'uhk-usb';
 import { Observable } from 'rxjs/Observable';
 import { Subscription } from 'rxjs/Subscription';
 import { emptyDir } from 'fs-extra';
+import * as path from 'path';

 import 'rxjs/add/observable/interval';
 import 'rxjs/add/operator/startWith';
@@ -11,9 +23,14 @@ import 'rxjs/add/operator/map';
 import 'rxjs/add/operator/do';
 import 'rxjs/add/operator/distinctUntilChanged';

-import { saveTmpFirmware } from '../util/save-extract-firmware';
 import { TmpFirmware } from '../models/tmp-firmware';
 import { QueueManager } from './queue-manager';
+import {
+    backupUserConfiguration,
+    getBackupUserConfigurationContent,
+    getPackageJsonFromPathAsync,
+    saveTmpFirmware
+} from '../util';

 /**
 * IpcMain pair of the UHK Communication
@@ -28,7 +45,8 @@ export class DeviceService {
    constructor(private logService: LogService,
                private win: Electron.BrowserWindow,
                private device: UhkHidDevice,
-                private operations: UhkOperations) {
+                private operations: UhkOperations,
+                private rootDir: string) {
        this.pollUhkDevice();

        ipcMain.on(IpcEvents.device.saveUserConfiguration, (...args: any[]) => {
@@ -60,6 +78,24 @@ export class DeviceService {

        ipcMain.on(IpcEvents.device.startConnectionPoller, this.pollUhkDevice.bind(this));

+        ipcMain.on(IpcEvents.device.recoveryDevice, (...args: any[]) => {
+            this.queueManager.add({
+                method: this.recoveryDevice,
+                bind: this,
+                params: args,
+                asynchronous: true
+            });
+        });
+
+        ipcMain.on(IpcEvents.device.enableUsbStackTest, (...args: any[]) => {
+            this.queueManager.add({
+                method: this.enableUsbStackTest,
+                bind: this,
+                params: args,
+                asynchronous: true
+            });
+        });
+
        logService.debug('[DeviceService] init success');
    }

@@ -73,10 +109,16 @@ export class DeviceService {
        try {
            await this.device.waitUntilKeyboardBusy();
            const result = await this.operations.loadConfigurations();
+            const modules: HardwareModules = await this.getHardwareModules(false);
+
+            const hardwareConfig = getHardwareConfigFromDeviceResponse(result.hardwareConfiguration);
+            const uniqueId = hardwareConfig.uniqueId;

            response = {
                success: true,
-                ...result
+                ...result,
+                modules,
+                backupConfiguration: await getBackupUserConfigurationContent(this.logService, uniqueId)
            };
        } catch (error) {
            response = {
@@ -90,33 +132,67 @@ export class DeviceService {
        event.sender.send(IpcEvents.device.loadConfigurationReply, JSON.stringify(response));
    }

+    public async getHardwareModules(catchError: boolean): Promise<HardwareModules> {
+        try {
+            await this.device.waitUntilKeyboardBusy();
+
+            return {
+                leftModuleInfo: await this.operations.getLeftModuleVersionInfo(),
+                rightModuleInfo: await this.operations.getRightModuleVersionInfo()
+            };
+        }
+        catch (err) {
+            if (!catchError) {
+                return err;
+            }
+
+            this.logService.error('[DeviceService] Read hardware modules information failed', err);
+        }
+    }
+
    public close(): void {
        this.stopPollTimer();
        this.logService.info('[DeviceService] Device connection checker stopped.');
    }

    public async updateFirmware(event: Electron.Event, args?: Array<string>): Promise<void> {
-        const response = new IpcResponse();
+        const response = new FirmwareUpgradeIpcResponse();
+
        let firmwarePathData: TmpFirmware;

        try {
+            const hardwareModules = await this.getHardwareModules(false);
+            this.logService.debug('Device right firmware version:', hardwareModules.rightModuleInfo.firmwareVersion);
+            this.logService.debug('Device left firmware version:', hardwareModules.leftModuleInfo.firmwareVersion);
+
+            this.device.resetDeviceCache();
            this.stopPollTimer();

            if (args && args.length > 0) {
                firmwarePathData = await saveTmpFirmware(args[0]);
+
+                const packageJson = await getPackageJsonFromPathAsync(firmwarePathData.packageJsonPath);
+                this.logService.debug('New firmware version:', packageJson.firmwareVersion);
+
                await this.operations.updateRightFirmware(firmwarePathData.rightFirmwarePath);
                await this.operations.updateLeftModule(firmwarePathData.leftFirmwarePath);
            }
            else {
+                const packageJsonPath = path.join(this.rootDir, 'packages/firmware/package.json');
+                const packageJson = await getPackageJsonFromPathAsync(packageJsonPath);
+                this.logService.debug('New firmware version:', packageJson.firmwareVersion);
+
                await this.operations.updateRightFirmware();
                await this.operations.updateLeftModule();
            }

            response.success = true;
+            response.modules = await this.getHardwareModules(false);
        } catch (error) {
            const err = {message: error.message, stack: error.stack};
            this.logService.error('[DeviceService] updateFirmware error', err);

+            response.modules = await this.getHardwareModules(true);
            response.error = err;
        }

@@ -125,9 +201,42 @@ export class DeviceService {
        }

        await snooze(500);
+
+        this.pollUhkDevice();
+
        event.sender.send(IpcEvents.device.updateFirmwareReply, response);
    }

+    public async recoveryDevice(event: Electron.Event): Promise<void> {
+        const response = new FirmwareUpgradeIpcResponse();
+
+        try {
+            this.stopPollTimer();
+
+            await this.operations.updateRightFirmware();
+
+            await snooze(500);
+
+            this.pollUhkDevice();
+
+            response.modules = await this.getHardwareModules(false);
+            response.success = true;
+        } catch (error) {
+            const err = {message: error.message, stack: error.stack};
+            this.logService.error('[DeviceService] updateFirmware error', err);
+
+            response.modules = await this.getHardwareModules(true);
+            response.error = err;
+        }
+
+        await snooze(500);
+        event.sender.send(IpcEvents.device.updateFirmwareReply, response);
+    }
+
+    public async enableUsbStackTest(event: Electron.Event) {
+        await this.device.enableUsbStackTest();
+    }
+
    /**
     * HID API not support device attached and detached event.
     * This method check the keyboard is attached to the computer or not.
@@ -141,26 +250,24 @@ export class DeviceService {

        this.pollTimer$ = Observable.interval(1000)
            .startWith(0)
-            .map(() => this.device.deviceConnected())
-            .distinctUntilChanged()
-            .do((connected: boolean) => {
-                const response: DeviceConnectionState = {
-                    connected,
-                    hasPermission: this.device.hasPermission()
-                };
-
-                this.win.webContents.send(IpcEvents.device.deviceConnectionStateChanged, response);
-                this.logService.info('[DeviceService] Device connection state changed to:', response);
+            .map(() => this.device.getDeviceConnectionState())
+            .distinctUntilChanged<DeviceConnectionState>(deviceConnectionStateComparer)
+            .do((state: DeviceConnectionState) => {
+                this.win.webContents.send(IpcEvents.device.deviceConnectionStateChanged, state);
+                this.logService.info('[DeviceService] Device connection state changed to:', state);
            })
            .subscribe();
    }

    private async saveUserConfiguration(event: Electron.Event, args: Array<string>): Promise<void> {
        const response = new IpcResponse();
-        const json = args[0];
+        const data: SaveUserConfigurationData = JSON.parse(args[0]);

        try {
-            await this.operations.saveUserConfiguration(json);
+            await backupUserConfiguration(data);
+
+            const buffer = mapObjectToUserConfigBinaryBuffer(data.configuration);
+            await this.operations.saveUserConfiguration(buffer);

            response.success = true;
        }
--- a/packages/uhk-agent/src/services/sudo.service.ts
+++ b/packages/uhk-agent/src/services/sudo.service.ts
@@ -5,12 +5,13 @@ import * as sudo from 'sudo-prompt';
 import { dirSync } from 'tmp';
 import { emptyDir, copy } from 'fs-extra';

-import { IpcEvents, LogService, IpcResponse } from 'uhk-common';
+import { CommandLineArgs, IpcEvents, LogService, IpcResponse } from 'uhk-common';

 export class SudoService {
    private rootDir: string;

-    constructor(private logService: LogService) {
+    constructor(private logService: LogService,
+                private options: CommandLineArgs) {
        if (isDev) {
            this.rootDir = path.join(path.join(process.cwd(), process.argv[1]), '../../../../');
        } else {
@@ -21,6 +22,19 @@ export class SudoService {
    }

    private async setPrivilege(event: Electron.Event) {
+        if (this.options.spe) {
+            const error = new Error('No polkit authentication agent found.');
+            this.logService.error('[SudoService] Simulate privilege escalation error ', error);
+
+            const response = new IpcResponse();
+            response.success = false;
+            response.error = {message: error.message};
+
+            event.sender.send(IpcEvents.device.setPrivilegeOnLinuxReply, response);
+
+            return;
+        }
+
        switch (process.platform) {
            case 'linux':
                await this.setPrivilegeOnLinux(event);
@@ -28,7 +42,7 @@ export class SudoService {
            default:
                const response: IpcResponse = {
                    success: false,
-                    error: { message: 'Permissions couldn\'t be set. Invalid platform: ' + process.platform }
+                    error: {message: 'Permissions couldn\'t be set. Invalid platform: ' + process.platform}
                };

                event.sender.send(IpcEvents.device.setPrivilegeOnLinuxReply, response);
@@ -39,7 +53,7 @@ export class SudoService {
    private async setPrivilegeOnLinux(event: Electron.Event) {
        const tmpDirectory = dirSync();
        const rulesDir = path.join(this.rootDir, 'rules');
-        this.logService.debug('[SudoService] Copy rules dir', { src: rulesDir, dst: tmpDirectory.name });
+        this.logService.debug('[SudoService] Copy rules dir', {src: rulesDir, dst: tmpDirectory.name});
        await copy(rulesDir, tmpDirectory.name);

        const scriptPath = path.join(tmpDirectory.name, 'setup-rules.sh');
@@ -55,7 +69,7 @@ export class SudoService {
            if (error) {
                this.logService.error('[SudoService] Error when set privilege: ', error);
                response.success = false;
-                response.error = error;
+                response.error = {message: error.message};
            } else {
                response.success = true;
            }
--- a/packages/uhk-agent/src/util/backup-user-confoguration.ts
+++ b/packages/uhk-agent/src/util/backup-user-confoguration.ts
@@ -0,0 +1,32 @@
+import { app } from 'electron';
+import { LogService, UserConfiguration, SaveUserConfigurationData } from 'uhk-common';
+import * as path from 'path';
+import * as fs from 'fs-extra';
+
+export const getBackupUserConfigurationPath = (uniqueId: number): string => {
+    const appDataDir = app.getPath('userData');
+
+    return path.join(appDataDir, `${uniqueId}.json`);
+};
+
+export const backupUserConfiguration = (data: SaveUserConfigurationData): Promise<void> => {
+    const backupFilePath = getBackupUserConfigurationPath(data.uniqueId);
+    return fs.writeJSON(backupFilePath, data.configuration, {spaces: 2});
+};
+
+export const getBackupUserConfigurationContent = async (logService: LogService, uniqueId: number): Promise<UserConfiguration> => {
+    try {
+        const backupFilePath = getBackupUserConfigurationPath(uniqueId);
+
+        if (await fs.pathExists(backupFilePath)) {
+            const json = await fs.readJSON(backupFilePath);
+            new UserConfiguration().fromJsonObject(json);
+
+            return json;
+        }
+
+        return null;
+    } catch (error) {
+        logService.error('Can not load backup user configuration for device', {uniqueId, error});
+    }
+};
--- a/packages/uhk-agent/src/util/get-package-json-from-path-async.ts
+++ b/packages/uhk-agent/src/util/get-package-json-from-path-async.ts
@@ -0,0 +1,13 @@
+import * as fs from 'fs';
+
+export const getPackageJsonFromPathAsync = async (filePath: string): Promise<any> => {
+    return new Promise((resolve, reject) => {
+        fs.readFile(filePath, {encoding: 'utf-8'}, (err, data) => {
+            if (err) {
+                return reject(err);
+            }
+
+            resolve(JSON.parse(data));
+        });
+    });
+};
--- a/packages/uhk-agent/src/util/index.ts
+++ b/packages/uhk-agent/src/util/index.ts
@@ -0,0 +1,3 @@
+export * from './backup-user-confoguration';
+export * from './get-package-json-from-path-async';
+export * from './save-extract-firmware';
--- a/packages/uhk-agent/src/util/save-extract-firmware.ts
+++ b/packages/uhk-agent/src/util/save-extract-firmware.ts
@@ -16,8 +16,8 @@ export async function saveTmpFirmware(data: string): Promise<TmpFirmware> {
    return {
        tmpDirectory,
        rightFirmwarePath: path.join(tmpDirectory.name, 'devices/uhk60-right/firmware.hex'),
-        leftFirmwarePath: path.join(tmpDirectory.name, 'modules/uhk60-left.bin')
-
+        leftFirmwarePath: path.join(tmpDirectory.name, 'modules/uhk60-left.bin'),
+        packageJsonPath: path.join(tmpDirectory.name, 'package.json')
    };
 }

--- a/packages/uhk-common/package-lock.json
+++ b/packages/uhk-common/package-lock.json
@@ -18,11 +18,11 @@
 			"integrity": "sha1-w7M6te42DYbg5ijwRorn7yfWVN8="
 		},
 		"ansi-styles": {
-			"version": "3.2.0",
-			"resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-3.2.0.tgz",
-			"integrity": "sha512-NnSOmMEYtVR2JVMIGTzynRkkaxtiq1xnFBcdQD/DnNCYPoEPsVJhM98BDyaoNOQIi7p4okdi3E27eN7GQbsUug==",
+			"version": "3.2.1",
+			"resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-3.2.1.tgz",
+			"integrity": "sha512-VT0ZI6kZRdTh8YyJw3SMbYm/u+NqfsAxEpWO0Pf9sq8/e94WxxOpPKx9FR1FlyCtOVDNOQ+8ntlqFxiRc+r5qA==",
 			"requires": {
-				"color-convert": "1.9.0"
+				"color-convert": "1.9.1"
 			}
 		},
 		"arrify": {
@@ -36,9 +36,9 @@
 			"integrity": "sha1-ibTRmasr7kneFk6gK4nORi1xt2c="
 		},
 		"brace-expansion": {
-			"version": "1.1.8",
-			"resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.8.tgz",
-			"integrity": "sha1-wHshHHyVLsH479Uad+8NHTmQopI=",
+			"version": "1.1.11",
+			"resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
+			"integrity": "sha512-iCuPHDFgrHX7H2vEI/5xpz07zSHB00TpugqhmYtVmMO6518mCuRMoOYFldEBl0g187ufozdaHgWKcYFb61qGiA==",
 			"requires": {
 				"balanced-match": "1.0.0",
 				"concat-map": "0.0.1"
@@ -55,13 +55,13 @@
 			"integrity": "sha1-1UVjW+HjPFQmScaRc+Xeas+uNN0="
 		},
 		"chalk": {
-			"version": "2.1.0",
-			"resolved": "https://registry.npmjs.org/chalk/-/chalk-2.1.0.tgz",
-			"integrity": "sha512-LUHGS/dge4ujbXMJrnihYMcL4AoOweGnw9Tp3kQuqy1Kx5c1qKjqvMJZ6nVJPMWJtKCTN72ZogH3oeSO9g9rXQ==",
+			"version": "2.3.2",
+			"resolved": "https://registry.npmjs.org/chalk/-/chalk-2.3.2.tgz",
+			"integrity": "sha512-ZM4j2/ld/YZDc3Ma8PgN7gyAk+kHMMMyzLNryCPGhWrsfAuDVeuid5bpRFTDgMH9JBK2lA4dyyAkkZYF/WcqDQ==",
 			"requires": {
-				"ansi-styles": "3.2.0",
+				"ansi-styles": "3.2.1",
 				"escape-string-regexp": "1.0.5",
-				"supports-color": "4.4.0"
+				"supports-color": "5.3.0"
 			}
 		},
 		"cliui": {
@@ -100,9 +100,9 @@
 			}
 		},
 		"color-convert": {
-			"version": "1.9.0",
-			"resolved": "https://registry.npmjs.org/color-convert/-/color-convert-1.9.0.tgz",
-			"integrity": "sha1-Gsz5fdc5uYO/mU1W/sj5WFNkG3o=",
+			"version": "1.9.1",
+			"resolved": "https://registry.npmjs.org/color-convert/-/color-convert-1.9.1.tgz",
+			"integrity": "sha512-mjGanIiwQJskCC18rPR6OmrZ6fm2Lc7PeGFYwCmy5J34wC6F1PzdGL6xeMfmgicfYcNLGuVFA3WzXtIDCQSZxQ==",
 			"requires": {
 				"color-name": "1.1.3"
 			}
@@ -122,15 +122,15 @@
 			"resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-5.1.0.tgz",
 			"integrity": "sha1-6L0O/uWPz/b4+UUQoKVUu/ojVEk=",
 			"requires": {
-				"lru-cache": "4.1.1",
+				"lru-cache": "4.1.2",
 				"shebang-command": "1.2.0",
 				"which": "1.3.0"
 			},
 			"dependencies": {
 				"lru-cache": {
-					"version": "4.1.1",
-					"resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-4.1.1.tgz",
-					"integrity": "sha512-q4spe4KTfsAS1SUHLO0wz8Qiyf1+vMIAgpRYioFYDMNqKfHQbg+AVDH3i4fvpl71/P1L0dBl+fQi+P37UYf0ew==",
+					"version": "4.1.2",
+					"resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-4.1.2.tgz",
+					"integrity": "sha512-wgeVXhrDwAWnIF/yZARsFnMBtdFXOg1b8RIrhilp+0iDYN4mdQcNZElDZ0e4B64BhaxeQ5zN7PMyvu7we1kPeQ==",
 					"requires": {
 						"pseudomap": "1.0.2",
 						"yallist": "2.1.2"
@@ -144,9 +144,9 @@
 			"integrity": "sha1-9lNNFRSCabIDUue+4m9QH5oZEpA="
 		},
 		"diff": {
-			"version": "3.4.0",
-			"resolved": "https://registry.npmjs.org/diff/-/diff-3.4.0.tgz",
-			"integrity": "sha512-QpVuMTEoJMF7cKzi6bvWhRulU1fZqZnvyVQgNhPaxxuTYwyjn/j1v9falseQ/uXWwPnO56RBfwtg4h/EQXmucA=="
+			"version": "3.5.0",
+			"resolved": "https://registry.npmjs.org/diff/-/diff-3.5.0.tgz",
+			"integrity": "sha512-A46qtFgd+g7pDZinpnwiRJtxbC1hpgf0uzP3iG89scHk0AUC7A1TGxf5OiiOUv/JMZR8GOt8hL900hV0bOy5xA=="
 		},
 		"error-ex": {
 			"version": "1.3.1",
@@ -271,9 +271,9 @@
 			"integrity": "sha1-3i1mE20ALhErpw8/EMMc98NQsto="
 		},
 		"has-flag": {
-			"version": "2.0.0",
-			"resolved": "https://registry.npmjs.org/has-flag/-/has-flag-2.0.0.tgz",
-			"integrity": "sha1-6CB68cx7MNRGzHC3NLXovhj4jVE="
+			"version": "3.0.0",
+			"resolved": "https://registry.npmjs.org/has-flag/-/has-flag-3.0.0.tgz",
+			"integrity": "sha1-tdRU3CGZriJWmfNGfloH87lVuv0="
 		},
 		"homedir-polyfill": {
 			"version": "1.0.1",
@@ -284,9 +284,9 @@
 			}
 		},
 		"hosted-git-info": {
-			"version": "2.5.0",
-			"resolved": "https://registry.npmjs.org/hosted-git-info/-/hosted-git-info-2.5.0.tgz",
-			"integrity": "sha512-pNgbURSuab90KbTqvRPsseaTxOJCZBD0a7t+haSN33piP9cCM4l0CqdzAif2hUqm716UovKB2ROmiabGAKVXyg=="
+			"version": "2.6.0",
+			"resolved": "https://registry.npmjs.org/hosted-git-info/-/hosted-git-info-2.6.0.tgz",
+			"integrity": "sha512-lIbgIIQA3lz5XaB6vxakj6sDHADJiZadYEJB+FgA+C4nubM1NwcuvUr9EJPmnH1skZqpqUzWborWo8EIUi0Sdw=="
 		},
 		"inflight": {
 			"version": "1.0.6",
@@ -382,7 +382,7 @@
 			"requires": {
 				"jasmine": "2.8.0",
 				"ts-node": "3.3.0",
-				"typescript": "2.5.3",
+				"typescript": "2.8.1",
 				"yargs": "8.0.2"
 			}
 		},
@@ -432,29 +432,29 @@
 			"integrity": "sha1-bUUk6LlV+V1PW1iFHOId1y+06VI="
 		},
 		"make-error": {
-			"version": "1.3.0",
-			"resolved": "https://registry.npmjs.org/make-error/-/make-error-1.3.0.tgz",
-			"integrity": "sha1-Uq06M5zPEM5itAQLcI/nByRLi5Y="
+			"version": "1.3.4",
+			"resolved": "https://registry.npmjs.org/make-error/-/make-error-1.3.4.tgz",
+			"integrity": "sha512-0Dab5btKVPhibSalc9QGXb559ED7G7iLjFXBaj9Wq8O3vorueR5K5jaE3hkG6ZQINyhA/JgG6Qk4qdFQjsYV6g=="
 		},
 		"mem": {
 			"version": "1.1.0",
 			"resolved": "https://registry.npmjs.org/mem/-/mem-1.1.0.tgz",
 			"integrity": "sha1-Xt1StIXKHZAP5kiVUFOZoN+kX3Y=",
 			"requires": {
-				"mimic-fn": "1.1.0"
+				"mimic-fn": "1.2.0"
 			}
 		},
 		"mimic-fn": {
-			"version": "1.1.0",
-			"resolved": "https://registry.npmjs.org/mimic-fn/-/mimic-fn-1.1.0.tgz",
-			"integrity": "sha1-5md4PZLonb00KBi1IwudYqZyrRg="
+			"version": "1.2.0",
+			"resolved": "https://registry.npmjs.org/mimic-fn/-/mimic-fn-1.2.0.tgz",
+			"integrity": "sha512-jf84uxzwiuiIVKiOLpfYk7N46TSy8ubTonmneY9vrpHNAnp0QBt2BxWV9dO3/j+BoVAb+a5G6YDPW3M5HOdMWQ=="
 		},
 		"minimatch": {
 			"version": "3.0.4",
 			"resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.0.4.tgz",
 			"integrity": "sha512-yJHVQEhyqPLUTgt9B83PXu6W3rx4MvvHvSUvToogpwoGDOUQ+yDrR0HRot+yOCdCO7u4hX3pWft6kWBBcqh0UA==",
 			"requires": {
-				"brace-expansion": "1.1.8"
+				"brace-expansion": "1.1.11"
 			}
 		},
 		"minimist": {
@@ -472,10 +472,10 @@
 			"resolved": "https://registry.npmjs.org/normalize-package-data/-/normalize-package-data-2.4.0.tgz",
 			"integrity": "sha512-9jjUFbTPfEy3R/ad/2oNbKtW9Hgovl5O1FvFWKkKblNXoN/Oou6+9+KKohPK13Yc3/TyunyWhJp6gvRNR/PPAw==",
 			"requires": {
-				"hosted-git-info": "2.5.0",
+				"hosted-git-info": "2.6.0",
 				"is-builtin-module": "1.0.0",
-				"semver": "5.4.1",
-				"validate-npm-package-license": "3.0.1"
+				"semver": "5.5.0",
+				"validate-npm-package-license": "3.0.3"
 			}
 		},
 		"npm-run-path": {
@@ -1942,18 +1942,26 @@
 			"integrity": "sha1-P7z7FbiZpEEjs0ttzBi3JDNqLK4="
 		},
 		"p-limit": {
-			"version": "1.1.0",
-			"resolved": "https://registry.npmjs.org/p-limit/-/p-limit-1.1.0.tgz",
-			"integrity": "sha1-sH/y2aXYi+yAYDWJWiurZqJ5iLw="
+			"version": "1.2.0",
+			"resolved": "https://registry.npmjs.org/p-limit/-/p-limit-1.2.0.tgz",
+			"integrity": "sha512-Y/OtIaXtUPr4/YpMv1pCL5L5ed0rumAaAeBSj12F+bSlMdys7i8oQF/GUJmfpTS/QoaRrS/k6pma29haJpsMng==",
+			"requires": {
+				"p-try": "1.0.0"
+			}
 		},
 		"p-locate": {
 			"version": "2.0.0",
 			"resolved": "https://registry.npmjs.org/p-locate/-/p-locate-2.0.0.tgz",
 			"integrity": "sha1-IKAQOyIqcMj9OcwuWAaA893l7EM=",
 			"requires": {
-				"p-limit": "1.1.0"
+				"p-limit": "1.2.0"
 			}
 		},
+		"p-try": {
+			"version": "1.0.0",
+			"resolved": "https://registry.npmjs.org/p-try/-/p-try-1.0.0.tgz",
+			"integrity": "sha1-y8ec26+P1CKOE/Yh8rGiN8GyB7M="
+		},
 		"parse-json": {
 			"version": "2.2.0",
 			"resolved": "https://registry.npmjs.org/parse-json/-/parse-json-2.2.0.tgz",
@@ -2030,9 +2038,9 @@
 			"integrity": "sha1-l/cXtp1IeE9fUmpsWqj/3aBVpNE="
 		},
 		"semver": {
-			"version": "5.4.1",
-			"resolved": "https://registry.npmjs.org/semver/-/semver-5.4.1.tgz",
-			"integrity": "sha512-WfG/X9+oATh81XtllIo/I8gOiY9EXRdv1cQdyykeXK17YcUW3EXUAi2To4pcH6nZtJPr7ZOpM5OMyWJZm+8Rsg=="
+			"version": "5.5.0",
+			"resolved": "https://registry.npmjs.org/semver/-/semver-5.5.0.tgz",
+			"integrity": "sha512-4SJ3dm0WAwWy/NVeioZh5AntkdJoWKxHxcmyP622fOkgHa4z3R0TdBJICINyaSDE6uNwVc8gZr+ZinwZAH4xIA=="
 		},
 		"set-blocking": {
 			"version": "2.0.0",
@@ -2076,22 +2084,32 @@
 			}
 		},
 		"spdx-correct": {
-			"version": "1.0.2",
-			"resolved": "https://registry.npmjs.org/spdx-correct/-/spdx-correct-1.0.2.tgz",
-			"integrity": "sha1-SzBz2TP/UfORLwOsVRlJikFQ20A=",
+			"version": "3.0.0",
+			"resolved": "https://registry.npmjs.org/spdx-correct/-/spdx-correct-3.0.0.tgz",
+			"integrity": "sha512-N19o9z5cEyc8yQQPukRCZ9EUmb4HUpnrmaL/fxS2pBo2jbfcFRVuFZ/oFC+vZz0MNNk0h80iMn5/S6qGZOL5+g==",
 			"requires": {
-				"spdx-license-ids": "1.2.2"
+				"spdx-expression-parse": "3.0.0",
+				"spdx-license-ids": "3.0.0"
 			}
 		},
+		"spdx-exceptions": {
+			"version": "2.1.0",
+			"resolved": "https://registry.npmjs.org/spdx-exceptions/-/spdx-exceptions-2.1.0.tgz",
+			"integrity": "sha512-4K1NsmrlCU1JJgUrtgEeTVyfx8VaYea9J9LvARxhbHtVtohPs/gFGG5yy49beySjlIMhhXZ4QqujIZEfS4l6Cg=="
+		},
 		"spdx-expression-parse": {
-			"version": "1.0.4",
-			"resolved": "https://registry.npmjs.org/spdx-expression-parse/-/spdx-expression-parse-1.0.4.tgz",
-			"integrity": "sha1-m98vIOH0DtRH++JzJmGR/O1RYmw="
+			"version": "3.0.0",
+			"resolved": "https://registry.npmjs.org/spdx-expression-parse/-/spdx-expression-parse-3.0.0.tgz",
+			"integrity": "sha512-Yg6D3XpRD4kkOmTpdgbUiEJFKghJH03fiC1OPll5h/0sO6neh2jqRDVHOQ4o/LMea0tgCkbMgea5ip/e+MkWyg==",
+			"requires": {
+				"spdx-exceptions": "2.1.0",
+				"spdx-license-ids": "3.0.0"
+			}
 		},
 		"spdx-license-ids": {
-			"version": "1.2.2",
-			"resolved": "https://registry.npmjs.org/spdx-license-ids/-/spdx-license-ids-1.2.2.tgz",
-			"integrity": "sha1-yd96NCRZSt5r0RkA1ZZpbcBrrFc="
+			"version": "3.0.0",
+			"resolved": "https://registry.npmjs.org/spdx-license-ids/-/spdx-license-ids-3.0.0.tgz",
+			"integrity": "sha512-2+EPwgbnmOIl8HjGBXXMd9NAu02vLjOO1nWw4kmeRDFyHn+M/ETfHxQUK0oXg8ctgVnl9t3rosNVsZ1jG61nDA=="
 		},
 		"string-width": {
 			"version": "2.1.1",
@@ -2146,11 +2164,11 @@
 			"integrity": "sha1-PFMZQukIwml8DsNEhYwobHygpgo="
 		},
 		"supports-color": {
-			"version": "4.4.0",
-			"resolved": "https://registry.npmjs.org/supports-color/-/supports-color-4.4.0.tgz",
-			"integrity": "sha512-rKC3+DyXWgK0ZLKwmRsrkyHVZAjNkfzeehuFWdGGcqGDTZFH73+RH6S/RDAAxl9GusSjZSUWYLmT9N5pzXFOXQ==",
+			"version": "5.3.0",
+			"resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.3.0.tgz",
+			"integrity": "sha512-0aP01LLIskjKs3lq52EC0aGBAJhLq7B2Rd8HC/DR/PtNNpcLilNmHC12O+hu0usQpo7wtHNRqtrhBwtDb0+dNg==",
 			"requires": {
-				"has-flag": "2.0.0"
+				"has-flag": "3.0.0"
 			}
 		},
 		"ts-node": {
@@ -2159,14 +2177,14 @@
 			"integrity": "sha1-wTxqMCTjC+EYDdUwOPwgkonUv2k=",
 			"requires": {
 				"arrify": "1.0.1",
-				"chalk": "2.1.0",
-				"diff": "3.4.0",
-				"make-error": "1.3.0",
+				"chalk": "2.3.2",
+				"diff": "3.5.0",
+				"make-error": "1.3.4",
 				"minimist": "1.2.0",
 				"mkdirp": "0.5.1",
 				"source-map-support": "0.4.18",
 				"tsconfig": "6.0.0",
-				"v8flags": "3.0.1",
+				"v8flags": "3.0.2",
 				"yn": "2.0.0"
 			},
 			"dependencies": {
@@ -2202,9 +2220,9 @@
 			}
 		},
 		"typescript": {
-			"version": "2.5.3",
-			"resolved": "https://registry.npmjs.org/typescript/-/typescript-2.5.3.tgz",
-			"integrity": "sha512-ptLSQs2S4QuS6/OD1eAKG+S5G8QQtrU5RT32JULdZQtM1L3WTi34Wsu48Yndzi8xsObRAB9RPt/KhA9wlpEF6w=="
+			"version": "2.8.1",
+			"resolved": "https://registry.npmjs.org/typescript/-/typescript-2.8.1.tgz",
+			"integrity": "sha512-Ao/f6d/4EPLq0YwzsQz8iXflezpTkQzqAyenTiw4kCUGr1uPiFLC3+fZ+gMZz6eeI/qdRUqvC+HxIJzUAzEFdg=="
 		},
 		"underscore": {
 			"version": "1.6.0",
@@ -2212,20 +2230,20 @@
 			"integrity": "sha1-izixDKze9jM3uLJOT/htRa6lKag="
 		},
 		"v8flags": {
-			"version": "3.0.1",
-			"resolved": "https://registry.npmjs.org/v8flags/-/v8flags-3.0.1.tgz",
-			"integrity": "sha1-3Oj8N5wX2fLJ6e142JzgAFKxt2s=",
+			"version": "3.0.2",
+			"resolved": "https://registry.npmjs.org/v8flags/-/v8flags-3.0.2.tgz",
+			"integrity": "sha512-6sgSKoFw1UpUPd3cFdF7QGnrH6tDeBgW1F3v9gy8gLY0mlbiBXq8soy8aQpY6xeeCjH5K+JvC62Acp7gtl7wWA==",
 			"requires": {
 				"homedir-polyfill": "1.0.1"
 			}
 		},
 		"validate-npm-package-license": {
-			"version": "3.0.1",
-			"resolved": "https://registry.npmjs.org/validate-npm-package-license/-/validate-npm-package-license-3.0.1.tgz",
-			"integrity": "sha1-KAS6vnEq0zeUWaz74kdGqywwP7w=",
+			"version": "3.0.3",
+			"resolved": "https://registry.npmjs.org/validate-npm-package-license/-/validate-npm-package-license-3.0.3.tgz",
+			"integrity": "sha512-63ZOUnL4SIXj4L0NixR3L1lcjO38crAbgrTpl28t8jjrfuiOBL5Iygm+60qPs/KsZGzPNg6Smnc/oY16QTjF0g==",
 			"requires": {
-				"spdx-correct": "1.0.2",
-				"spdx-expression-parse": "1.0.4"
+				"spdx-correct": "3.0.0",
+				"spdx-expression-parse": "3.0.0"
 			}
 		},
 		"walkdir": {
--- a/packages/uhk-common/package.json
+++ b/packages/uhk-common/package.json
@@ -3,14 +3,18 @@
  "private": true,
  "version": "1.0.0",
  "description": "Common Library contains the common code for uhk-agent (electron-main) and web (electron-renderer) modules",
-  "main": "dist/index.js",
+  "main": "dist/src/index.js",
+  "types": "dist/src/index.d.ts",
  "author": "Ultimate Gadget Laboratories",
  "repository": {
    "type": "git",
    "url": "git@github.com:UltimateHackingKeyboard/agent.git"
  },
  "scripts": {
-    "build": "tsc",
+    "build": "run-s tsc copy:*",
+    "tsc": "tsc",
+    "copy:scancodes": "copyfiles ./src/config-serializer/config-items/scancodes.json dist",
+    "copy:secondary-roles": "copyfiles ./src/config-serializer/config-items/secondaryRole.json dist",
    "test": "jasmine-ts --config=jasmine.json",
    "coverage": "nyc jasmine-ts --config=jasmine.json"
  },
--- a/packages/uhk-common/src/config-serializer/config-items/hardware-configuration.ts
+++ b/packages/uhk-common/src/config-serializer/config-items/hardware-configuration.ts
@@ -41,16 +41,20 @@ export class HardwareConfiguration {
    }

    fromBinary(buffer: UhkBuffer): HardwareConfiguration {
-        this.signature = buffer.readString();
-        this.majorVersion = buffer.readUInt8();
-        this.minorVersion = buffer.readUInt8();
-        this.patchVersion = buffer.readUInt8();
-        this.brandId = buffer.readUInt8();
-        this.deviceId = buffer.readUInt8();
-        this.uniqueId = buffer.readUInt32();
-        this.isVendorModeOn = buffer.readBoolean();
-        this.isIso = buffer.readBoolean();
-        return this;
+        try {
+            this.signature = buffer.readString();
+            this.majorVersion = buffer.readUInt8();
+            this.minorVersion = buffer.readUInt8();
+            this.patchVersion = buffer.readUInt8();
+            this.brandId = buffer.readUInt8();
+            this.deviceId = buffer.readUInt8();
+            this.uniqueId = buffer.readUInt32();
+            this.isVendorModeOn = buffer.readBoolean();
+            this.isIso = buffer.readBoolean();
+            return this;
+        } catch (e) {
+            throw new Error('Please power cycle your keyboard (Invalid hardware configuration: Index out of bounds)');
+        }
    }

    toJsonObject(): any {
--- a/packages/uhk-common/src/config-serializer/config-items/index.ts
+++ b/packages/uhk-common/src/config-serializer/config-items/index.ts
@@ -9,3 +9,6 @@ export * from './macro';
 export * from './module';
 export * from './module-configuration';
 export * from './user-configuration';
+
+export const SCANCODES = require('./scancodes.json');
+export const SECONDARY_ROLES = require('./secondaryRole.json');
--- a/packages/uhk-common/src/config-serializer/config-items/key-action/helper.ts
+++ b/packages/uhk-common/src/config-serializer/config-items/key-action/helper.ts
@@ -8,6 +8,7 @@ import { SwitchKeymapAction, UnresolvedSwitchKeymapAction } from './switch-keyma
 import { MouseAction } from './mouse-action';
 import { PlayMacroAction } from './play-macro-action';
 import { NoneAction } from './none-action';
+import { isScancodeExists } from '../scancode-checker';

 export class Helper {

@@ -26,7 +27,12 @@ export class Helper {
        buffer.backtrack();

        if (keyActionFirstByte >= KeyActionId.KeystrokeAction && keyActionFirstByte < KeyActionId.LastKeystrokeAction) {
-            return new KeystrokeAction().fromBinary(buffer);
+            const keystrokeAction = new KeystrokeAction().fromBinary(buffer);
+            if (isValidKeystrokeAction(keystrokeAction)) {
+                return keystrokeAction;
+            }
+
+            return new NoneAction();
        }

        switch (keyActionFirstByte) {
@@ -68,8 +74,14 @@ export class Helper {
        }

        switch (keyAction.keyActionType) {
-            case keyActionType.KeystrokeAction:
-                return new KeystrokeAction().fromJsonObject(keyAction);
+            case keyActionType.KeystrokeAction: {
+                const keystrokeAction = new KeystrokeAction().fromJsonObject(keyAction);
+                if (isValidKeystrokeAction(keystrokeAction)) {
+                    return keystrokeAction;
+                }
+
+                return new NoneAction();
+            }
            case keyActionType.SwitchLayerAction:
                return new SwitchLayerAction().fromJsonObject(keyAction);
            case keyActionType.SwitchKeymapAction:
@@ -85,3 +97,9 @@ export class Helper {
        }
    }
 }
+
+function isValidKeystrokeAction(keystrokeAction: KeystrokeAction): boolean {
+    return keystrokeAction.hasSecondaryRoleAction() ||
+        keystrokeAction.hasActiveModifier() ||
+        keystrokeAction.hasScancode() && isScancodeExists(keystrokeAction.scancode);
+}
--- a/packages/uhk-common/src/config-serializer/config-items/key-action/keystroke-action.ts
+++ b/packages/uhk-common/src/config-serializer/config-items/key-action/keystroke-action.ts
@@ -13,7 +13,7 @@ export enum KeystrokeActionFlag {

 const KEYSTROKE_ACTION_FLAG_LENGTH = 3;

-interface JsonObjectKeystrokeAction {
+export interface JsonObjectKeystrokeAction {
    keyActionType: string;
    scancode?: number;
    modifierMask?: number;
--- a/packages/uhk-common/src/config-serializer/config-items/key-action/switch-layer-action.spec.ts
+++ b/packages/uhk-common/src/config-serializer/config-items/key-action/switch-layer-action.spec.ts
@@ -1,17 +1,18 @@
 import { binaryDefaultHelper, jsonDefaultHelper } from '../../../../test/serializer-test-helper';
-import { SwitchLayerAction } from './switch-layer-action';
+import { SwitchLayerAction, SwitchLayerMode } from './switch-layer-action';
+import { keyActionType } from './key-action';

 // TODO: Add null, undefined, empty object, empty buffer test cases
 describe('switch-layer-action', () => {
-    const action = new SwitchLayerAction(<SwitchLayerAction>{layer: 0, isLayerToggleable: false});
+    const action = new SwitchLayerAction(<SwitchLayerAction>{layer: 0, switchLayerMode: SwitchLayerMode.hold});

    it('should be instantiate', () => {
        expect(new SwitchLayerAction()).toBeTruthy();
    });

    describe('toString', () => {
-        it('should return <SwitchLayerAction layer="0" toggle="false">', () => {
-            expect(action.toString()).toEqual('<SwitchLayerAction layer="0" toggle="false">');
+        it('should return <SwitchLayerAction layer="0" switchLayerMode="hold">', () => {
+            expect(action.toString()).toEqual('<SwitchLayerAction layer="0" switchLayerMode="hold">');
        });
    });

@@ -30,4 +31,20 @@ describe('switch-layer-action', () => {
            binaryDefaultHelper(action);
        });
    });
+
+    describe('backward compatibility of the "toggle" property ', () => {
+        it('should map toggle=false to SwitchLayerMode.holdAndDoubleTapToggle', () => {
+            const oldAction = new SwitchLayerAction();
+            oldAction.fromJsonObject({keyActionType: keyActionType.SwitchLayerAction, layer: 0, toggle: false});
+
+            expect(oldAction.switchLayerMode).toEqual(SwitchLayerMode.holdAndDoubleTapToggle);
+        });
+
+        it('should map toggle=true to SwitchLayerMode.toggle', () => {
+            const oldAction = new SwitchLayerAction();
+            oldAction.fromJsonObject({keyActionType: keyActionType.SwitchLayerAction, layer: 0, toggle: true});
+
+            expect(oldAction.switchLayerMode).toEqual(SwitchLayerMode.toggle);
+        });
+    });
 });
--- a/packages/uhk-common/src/config-serializer/config-items/key-action/switch-layer-action.ts
+++ b/packages/uhk-common/src/config-serializer/config-items/key-action/switch-layer-action.ts
@@ -8,9 +8,48 @@ export enum LayerName {
    mouse
 }

+export enum SwitchLayerMode {
+    holdAndDoubleTapToggle = 'holdAndDoubleTapToggle',
+    toggle = 'toggle',
+    hold = 'hold'
+}
+
+export const mapSwitchLayerModeToNumber = (switchLayerMode: SwitchLayerMode): number => {
+    switch (switchLayerMode) {
+        case SwitchLayerMode.holdAndDoubleTapToggle:
+            return 0;
+
+        case SwitchLayerMode.toggle:
+            return 1;
+
+        case SwitchLayerMode.hold:
+            return 2;
+
+        default:
+            throw new Error(`Can not map ${switchLayerMode} to number`);
+    }
+};
+
+export const mapNumberToSwitchLayerMode = (value: number): SwitchLayerMode => {
+    switch (value) {
+        case 0:
+            return SwitchLayerMode.holdAndDoubleTapToggle;
+
+        case 1:
+            return SwitchLayerMode.toggle;
+
+        case 2:
+            return SwitchLayerMode.hold;
+
+        default:
+            throw new Error(`Can not map "${value}" to SwitchLayerMode`);
+    }
+};
+
 export class SwitchLayerAction extends KeyAction {

-    isLayerToggleable: boolean;
+    @assertEnum(SwitchLayerMode)
+    switchLayerMode: SwitchLayerMode;

    @assertEnum(LayerName)
    layer: LayerName;
@@ -20,21 +59,29 @@ export class SwitchLayerAction extends KeyAction {
        if (!other) {
            return;
        }
-        this.isLayerToggleable = other.isLayerToggleable;
+        this.switchLayerMode = other.switchLayerMode;
        this.layer = other.layer;
    }

    fromJsonObject(jsonObject: any): SwitchLayerAction {
        this.assertKeyActionType(jsonObject);
        this.layer = LayerName[<string>jsonObject.layer];
-        this.isLayerToggleable = jsonObject.toggle;
+
+        // Backward compatibility when "switchLayerMode" was a boolean type as "toggle"
+        if (typeof jsonObject.toggle === 'boolean') {
+            this.switchLayerMode = jsonObject.toggle ? SwitchLayerMode.toggle : SwitchLayerMode.holdAndDoubleTapToggle;
+        }
+        else {
+            this.switchLayerMode = jsonObject.switchLayerMode;
+        }
+
        return this;
    }

    fromBinary(buffer: UhkBuffer): SwitchLayerAction {
        this.readAndAssertKeyActionId(buffer);
        this.layer = buffer.readUInt8();
-        this.isLayerToggleable = buffer.readBoolean();
+        this.switchLayerMode = mapNumberToSwitchLayerMode(buffer.readUInt8());
        return this;
    }

@@ -42,18 +89,18 @@ export class SwitchLayerAction extends KeyAction {
        return {
            keyActionType: keyActionType.SwitchLayerAction,
            layer: LayerName[this.layer],
-            toggle: this.isLayerToggleable
+            switchLayerMode: this.switchLayerMode
        };
    }

    toBinary(buffer: UhkBuffer) {
        buffer.writeUInt8(KeyActionId.SwitchLayerAction);
        buffer.writeUInt8(this.layer);
-        buffer.writeBoolean(this.isLayerToggleable);
+        buffer.writeUInt8(mapSwitchLayerModeToNumber(this.switchLayerMode));
    }

    toString(): string {
-        return `<SwitchLayerAction layer="${this.layer}" toggle="${this.isLayerToggleable}">`;
+        return `<SwitchLayerAction layer="${this.layer}" switchLayerMode="${this.switchLayerMode}">`;
    }

    public getName(): string {
--- a/packages/uhk-common/src/config-serializer/config-items/keymap.ts
+++ b/packages/uhk-common/src/config-serializer/config-items/keymap.ts
@@ -127,7 +127,7 @@ export class Keymap {
                        if (currentLayerId - 1 === baseKeyAction.layer) {
                            if (currentKeyAction instanceof SwitchLayerAction) {
                                if (currentKeyAction.layer === baseKeyAction.layer &&
-                                    currentKeyAction.isLayerToggleable === baseKeyAction.isLayerToggleable) {
+                                    currentKeyAction.switchLayerMode === baseKeyAction.switchLayerMode) {
                                    continue;
                                }
                                // tslint:disable-next-line: max-line-length
--- a/packages/uhk-common/src/config-serializer/config-items/macro-action/key-macro-action.ts
+++ b/packages/uhk-common/src/config-serializer/config-items/macro-action/key-macro-action.ts
@@ -1,10 +1,10 @@
-import { assertEnum, assertUInt8 } from '../../assert';
+import { assertEnum, assertUInt8, assertUInt16 } from '../../assert';
 import { UhkBuffer } from '../../uhk-buffer';
 import { KeyModifiers } from '../key-modifiers';
 import { MacroAction, MacroActionId, MacroKeySubAction, macroActionType } from './macro-action';
 import { KeystrokeType } from '../key-action';

-interface JsObjectKeyMacroAction {
+export interface JsObjectKeyMacroAction {
    macroActionType: string;
    action: string;
    type?: string;
@@ -20,12 +20,24 @@ export class KeyMacroAction extends MacroAction {
    @assertEnum(KeystrokeType)
    type: KeystrokeType;

-    @assertUInt8
-    scancode: number;
-
    @assertUInt8
    modifierMask: number;

+    @assertUInt16
+    private _scancode: number;
+
+    set scancode(scancode: number) {
+        this._scancode = scancode;
+        if (this.type !== KeystrokeType.shortMedia && this.type !== KeystrokeType.longMedia) {
+            return;
+        }
+        this.type = scancode < 256 ? KeystrokeType.shortMedia : KeystrokeType.longMedia;
+    }
+
+    get scancode() {
+        return this._scancode;
+    }
+
    constructor(other?: KeyMacroAction) {
        super();
        if (!other) {
@@ -33,7 +45,7 @@ export class KeyMacroAction extends MacroAction {
        }
        this.action = other.action;
        this.type = other.type;
-        this.scancode = other.scancode;
+        this._scancode = other._scancode;
        this.modifierMask = other.modifierMask;
    }

@@ -45,7 +57,7 @@ export class KeyMacroAction extends MacroAction {
        } else {
            this.type = KeystrokeType[jsObject.type];
        }
-        this.scancode = jsObject.scancode;
+        this._scancode = jsObject.scancode;
        this.modifierMask = jsObject.modifierMask;
        return this;
    }
@@ -58,7 +70,7 @@ export class KeyMacroAction extends MacroAction {
        this.type = keyMacroType & 0b11;
        keyMacroType >>= 2;
        if (keyMacroType & 0b10) {
-            this.scancode = buffer.readUInt8();
+            this._scancode = this.type === KeystrokeType.longMedia ? buffer.readUInt16() : buffer.readUInt8();
        }
        if (keyMacroType & 0b01) {
            this.modifierMask = buffer.readUInt8();
@@ -78,7 +90,7 @@ export class KeyMacroAction extends MacroAction {
            } else {
                jsObject.type = KeystrokeType[this.type];
            }
-            jsObject.scancode = this.scancode;
+            jsObject.scancode = this._scancode;
        }

        if (this.hasModifiers()) {
@@ -98,7 +110,11 @@ export class KeyMacroAction extends MacroAction {

        buffer.writeUInt8(keyMacroType);
        if (this.hasScancode()) {
-            buffer.writeUInt8(this.scancode);
+            if (this.type === KeystrokeType.longMedia) {
+                buffer.writeUInt16(this.scancode);
+            } else {
+                buffer.writeUInt8(this.scancode);
+            }
        }
        if (this.hasModifiers()) {
            buffer.writeUInt8(this.modifierMask);
@@ -106,7 +122,7 @@ export class KeyMacroAction extends MacroAction {
    }

    toString(): string {
-        return `<KeyMacroAction action="${this.action}" scancode="${this.scancode}" modifierMask="${this.modifierMask}">`;
+        return `<KeyMacroAction action="${this.action}" scancode="${this._scancode}" modifierMask="${this.modifierMask}">`;
    }

    isModifierActive(modifier: KeyModifiers): boolean {
@@ -114,7 +130,7 @@ export class KeyMacroAction extends MacroAction {
    }

    hasScancode(): boolean {
-        return !!this.scancode;
+        return !!this._scancode;
    }

    hasModifiers(): boolean {
--- a/packages/uhk-common/src/config-serializer/config-items/macro-action/keymap.spec.ts
+++ b/packages/uhk-common/src/config-serializer/config-items/macro-action/keymap.spec.ts
@@ -109,7 +109,7 @@ describe('keymap', () => {
                                    {
                                        keyActionType: 'switchLayer',
                                        layer: 'mod',
-                                        toggle: false
+                                        switchLayerMode: 'holdAndDoubleTapToggle'
                                    }
                                ]
                            }]
@@ -121,7 +121,7 @@ describe('keymap', () => {
                                    {
                                        keyActionType: 'switchLayer',
                                        layer: 'mod',
-                                        toggle: false
+                                        switchLayerMode: 'holdAndDoubleTapToggle'
                                    }
                                ]
                            }]
@@ -151,7 +151,7 @@ describe('keymap', () => {

        expect(inputUserConfig.toJsonObject()).toEqual(expectedJsonConfig);
        // tslint:disable-next-line: max-line-length
-        expect(console.warn).toHaveBeenCalledWith('QWERTY.layers[1]modules[0].keyActions[0] is not switch layer. <KeystrokeAction type="basic" scancode="44"> will be override with <SwitchLayerAction layer="0" toggle="false">');
+        expect(console.warn).toHaveBeenCalledWith('QWERTY.layers[1]modules[0].keyActions[0] is not switch layer. <KeystrokeAction type="basic" scancode="44"> will be override with <SwitchLayerAction layer="0" switchLayerMode="holdAndDoubleTapToggle">');
    });

    it('should normalize SwitchLayerAction if non base layer action is other SwitchLayerAction', () => {
@@ -262,7 +262,7 @@ describe('keymap', () => {
                                    {
                                        keyActionType: 'switchLayer',
                                        layer: 'mod',
-                                        toggle: false
+                                        switchLayerMode: 'holdAndDoubleTapToggle'
                                    }
                                ]
                            }]
@@ -274,7 +274,7 @@ describe('keymap', () => {
                                    {
                                        keyActionType: 'switchLayer',
                                        layer: 'mod',
-                                        toggle: false
+                                        switchLayerMode: 'holdAndDoubleTapToggle'
                                    }
                                ]
                            }]
@@ -304,6 +304,6 @@ describe('keymap', () => {

        expect(inputUserConfig.toJsonObject()).toEqual(expectedJsonConfig);
        // tslint:disable-next-line: max-line-length
-        expect(console.warn).toHaveBeenCalledWith('QWERTY.layers[1]modules[0].keyActions[0] is different switch layer. <SwitchLayerAction layer="1" toggle="false"> will be override with <SwitchLayerAction layer="0" toggle="false">');
+        expect(console.warn).toHaveBeenCalledWith('QWERTY.layers[1]modules[0].keyActions[0] is different switch layer. <SwitchLayerAction layer="1" switchLayerMode="holdAndDoubleTapToggle"> will be override with <SwitchLayerAction layer="0" switchLayerMode="holdAndDoubleTapToggle">');
    });
 });
--- a/packages/uhk-common/src/config-serializer/config-items/macro-action/mouse-button-macro-action.ts
+++ b/packages/uhk-common/src/config-serializer/config-items/macro-action/mouse-button-macro-action.ts
@@ -8,7 +8,7 @@ export enum MouseButtons {
    Right = 1 << 2
 }

-interface JsObjectMouseButtonMacroAction {
+export interface JsObjectMouseButtonMacroAction {
    macroActionType: string;
    action: string;
    mouseButtonsMask?: number;
--- a/packages/uhk-common/src/config-serializer/config-items/module.ts
+++ b/packages/uhk-common/src/config-serializer/config-items/module.ts
@@ -54,15 +54,12 @@ export class Module {

        const noneAction = new NoneAction();

-        const keyActions: KeyAction[] = this.keyActions.map(keyAction => {
+        buffer.writeArray(this.keyActions, (uhkBuffer: UhkBuffer, keyAction: KeyAction) => {
            if (keyAction) {
-                return keyAction;
+                keyAction.toBinary(uhkBuffer, userConfiguration);
+            } else {
+                noneAction.toBinary(uhkBuffer);
            }
-            return noneAction;
-        });
-
-        buffer.writeArray(keyActions, (uhkBuffer: UhkBuffer, keyAction: KeyAction) => {
-            keyAction.toBinary(uhkBuffer, userConfiguration);
        });
    }

--- a/packages/uhk-common/src/config-serializer/config-items/scancode-checker.ts
+++ b/packages/uhk-common/src/config-serializer/config-items/scancode-checker.ts
@@ -0,0 +1,26 @@
+import { SCANCODES } from './';
+
+let scancodeMap: Map<number, any>;
+
+export function isScancodeExists(scancode: number): boolean {
+    if (!scancodeMap) {
+        fillScancodeMap();
+    }
+
+    return scancodeMap.has(scancode);
+}
+
+function fillScancodeMap(): void {
+    scancodeMap = new Map<number, any>();
+
+    for (const scanGroup of SCANCODES) {
+        for (const child of scanGroup.children) {
+            if (child.additional && child.additional.scancode) {
+                scancodeMap.set(child.additional.scancode, child);
+            }
+            else {
+                scancodeMap.set(Number.parseInt(child.id), child);
+            }
+        }
+    }
+}
--- a/packages/uhk-web/src/app/components/popover/tab/keypress/scancodes.json
+++ b/packages/uhk-web/src/app/components/popover/tab/keypress/scancodes.json
@@ -105,6 +105,10 @@
            {
                "id": "29",
                "text": "Z"
+            },
+            {
+              "id": "100",
+              "text": "| ISO"
            }
        ]
    },
@@ -242,7 +246,7 @@
                "text": "Delete"
            },
            {
-                "id": "118",
+                "id": "101",
                "text": "Menu"
            },
            {
@@ -314,10 +318,6 @@
                "id": "69",
                "text": "F12"
            },
-            {
-              "id": "100",
-              "text": "| ISO"
-            },
            {
                "id": "104",
                "text": "F13"
--- a/packages/uhk-web/src/app/components/popover/tab/keypress/secondaryRole.json
+++ b/packages/uhk-web/src/app/components/popover/tab/keypress/secondaryRole.json
--- a/packages/uhk-common/src/models/app-start-info.ts
+++ b/packages/uhk-common/src/models/app-start-info.ts
@@ -4,4 +4,7 @@ export interface AppStartInfo {
    commandLineArgs: CommandLineArgs;
    deviceConnected: boolean;
    hasPermission: boolean;
+    bootloaderActive: boolean;
+    platform: string;
+    osVersion: string;
 }
--- a/packages/uhk-common/src/models/command-line-args.ts
+++ b/packages/uhk-common/src/models/command-line-args.ts
@@ -1,3 +1,15 @@
 export interface CommandLineArgs {
-    addons: boolean;
+    /**
+     * addons menu visible or not
+     */
+    addons?: boolean;
+    /**
+     * simulate privilege escalation error
+     */
+    spe?: boolean;
+    /**
+     * show 'Lock layer when double tapping this key' checkbox on 'Layer' tab of the config popover
+     * if it false the checkbox invisible and the value of the checkbox = true
+     */
+    layerDoubleTap?: boolean;
 }
--- a/packages/uhk-common/src/models/configuration-reply.ts
+++ b/packages/uhk-common/src/models/configuration-reply.ts
@@ -1,6 +1,11 @@
+import { HardwareModules } from './hardware-modules';
+import { UserConfiguration } from '../config-serializer/config-items';
+
 export interface ConfigurationReply {
    success: boolean;
    userConfiguration?: string;
    hardwareConfiguration?: string;
+    modules?: HardwareModules;
    error?: string;
+    backupConfiguration?: UserConfiguration;
 }
--- a/packages/uhk-common/src/models/device-connection-state.ts
+++ b/packages/uhk-common/src/models/device-connection-state.ts
@@ -1,4 +1,5 @@
 export interface DeviceConnectionState {
    connected: boolean;
    hasPermission: boolean;
+    bootloaderActive: boolean;
 }
--- a/packages/uhk-common/src/models/hardware-module-info.ts
+++ b/packages/uhk-common/src/models/hardware-module-info.ts
@@ -0,0 +1,4 @@
+export interface HardwareModuleInfo {
+    firmwareVersion?: string;
+    moduleProtocolVersion?: string;
+}
--- a/packages/uhk-common/src/models/hardware-modules.ts
+++ b/packages/uhk-common/src/models/hardware-modules.ts
@@ -0,0 +1,6 @@
+import { HardwareModuleInfo } from './hardware-module-info';
+
+export interface HardwareModules {
+    leftModuleInfo?: HardwareModuleInfo;
+    rightModuleInfo?: HardwareModuleInfo;
+}
--- a/packages/uhk-common/src/models/index.ts
+++ b/packages/uhk-common/src/models/index.ts
@@ -5,3 +5,6 @@ export * from './app-start-info';
 export * from './configuration-reply';
 export * from './version-information';
 export * from './device-connection-state';
+export * from './hardware-modules';
+export * from './hardware-module-info';
+export * from './save-user-configuration-data';
--- a/packages/uhk-common/src/models/ipc-response.ts
+++ b/packages/uhk-common/src/models/ipc-response.ts
@@ -1,4 +1,10 @@
+import { HardwareModules } from './hardware-modules';
+
 export class IpcResponse {
    success: boolean;
    error?: { message: string };
 }
+
+export class FirmwareUpgradeIpcResponse extends IpcResponse {
+    modules?: HardwareModules;
+}
--- a/packages/uhk-common/src/models/save-user-configuration-data.ts
+++ b/packages/uhk-common/src/models/save-user-configuration-data.ts
@@ -0,0 +1,4 @@
+export interface SaveUserConfigurationData {
+    uniqueId: number;
+    configuration: string;
+}
--- a/packages/uhk-common/src/util/constants.ts
+++ b/packages/uhk-common/src/util/constants.ts
@@ -1,3 +1,4 @@
 export namespace Constants {
    export const AGENT_GITHUB_URL = 'https://github.com/UltimateHackingKeyboard/agent';
+    export const FIRMWARE_GITHUB_ISSUE_URL = 'https://github.com/UltimateHackingKeyboard/agent/issues/new';
 }
--- a/packages/uhk-common/src/util/helpers.ts
+++ b/packages/uhk-common/src/util/helpers.ts
@@ -0,0 +1,38 @@
+import { HardwareConfiguration, UhkBuffer, UserConfiguration } from '../config-serializer';
+
+export const getHardwareConfigFromDeviceResponse = (json: string): HardwareConfiguration => {
+    const data = JSON.parse(json);
+    const hardwareConfig = new HardwareConfiguration();
+    hardwareConfig.fromBinary(UhkBuffer.fromArray(data));
+
+    if (hardwareConfig.signature === 'FTY') {
+        throw Error('The device is in factory reset mode. Power-cycle the device to use it with Agent!');
+    }
+
+    if (hardwareConfig.signature !== 'UHK') {
+        throw Error('Please power cycle your keyboard (Invalid hardware configuration: Invalid signature)');
+    }
+
+    return hardwareConfig;
+};
+
+export const getUserConfigFromDeviceResponse = (json: string): UserConfiguration => {
+    const data = JSON.parse(json);
+    const userConfig = new UserConfiguration();
+    userConfig.fromBinary(UhkBuffer.fromArray(data));
+
+    if (userConfig.userConfigMajorVersion > 0) {
+        return userConfig;
+    }
+
+    throw Error('Invalid user configuration');
+};
+
+export const mapObjectToUserConfigBinaryBuffer = (obj: any): Buffer => {
+    const configuration = new UserConfiguration();
+    configuration.fromJsonObject(obj);
+    const buffer = new UhkBuffer();
+    configuration.toBinary(buffer);
+
+    return buffer.getBufferContent();
+};
--- a/packages/uhk-common/src/util/index.ts
+++ b/packages/uhk-common/src/util/index.ts
@@ -1,6 +1,8 @@
 export { IpcEvents } from './ipcEvents';
 export * from './log';
 export * from './constants';
+export * from './helpers';
+export * from './is-equal-array';

 // Source: http://stackoverflow.com/questions/13720256/javascript-regex-camelcase-to-sentence
 export function camelCaseToSentence(camelCasedText: string): string {
--- a/packages/uhk-common/src/util/ipcEvents.ts
+++ b/packages/uhk-common/src/util/ipcEvents.ts
@@ -1,4 +1,4 @@
-class App {
+export class App {
    public static readonly appStarted = 'app-started';
    public static readonly getAppStartInfo = 'app-get-start-info';
    public static readonly getAppStartInfoReply = 'app-get-start-info-reply';
@@ -6,7 +6,7 @@ class App {
    public static readonly openUrl = 'open-url';
 }

-class AutoUpdate {
+export class AutoUpdate {
    public static readonly checkingForUpdate = 'checking-for-update';
    public static readonly updateAvailable = 'update-available';
    public static readonly updateNotAvailable = 'update-not-available';
@@ -18,7 +18,7 @@ class AutoUpdate {
    public static readonly checkForUpdateNotAvailable = 'check-for-update-not-available';
 }

-class Device {
+export class Device {
    public static readonly setPrivilegeOnLinux = 'set-privilege-on-linux';
    public static readonly setPrivilegeOnLinuxReply = 'set-privilege-on-linux-reply';
    public static readonly deviceConnectionStateChanged = 'device-connection-state-changed';
@@ -29,6 +29,8 @@ class Device {
    public static readonly updateFirmware = 'device-update-firmware';
    public static readonly updateFirmwareReply = 'device-update-firmware-reply';
    public static readonly startConnectionPoller = 'device-start-connection-poller';
+    public static readonly recoveryDevice = 'device-recovery';
+    public static readonly enableUsbStackTest = 'enable-usb-stack-test';
 }

 export class IpcEvents {
--- a/packages/uhk-common/src/util/is-equal-array.ts
+++ b/packages/uhk-common/src/util/is-equal-array.ts
@@ -0,0 +1,15 @@
+import { isEqual } from 'lodash';
+
+export const isEqualArray = (arr1: Array<any>, arr2: Array<any>): boolean => {
+    if (arr1.length !== arr2.length) {
+        return false;
+    }
+
+    for (const a of arr1) {
+        if (!arr2.some(b => isEqual(a, b))) {
+            return false;
+        }
+    }
+
+    return true;
+};
--- a/packages/uhk-common/tsconfig.json
+++ b/packages/uhk-common/tsconfig.json
@@ -3,7 +3,7 @@
  "compilerOptions": {
    "sourceMap": true,
    "outDir": "./dist",
-    "declaration": false,
+    "declaration": true,
    "module": "commonjs",
    "moduleResolution": "node",
    "emitDecoratorMetadata": true,
--- a/packages/uhk-usb/package-lock.json
+++ b/packages/uhk-usb/package-lock.json
@@ -23,7 +23,7 @@
 			"integrity": "sha1-u13KOCu5TwXhUZQ3PRb9O6HKEQ0=",
 			"requires": {
 				"delegates": "1.0.0",
-				"readable-stream": "2.3.3"
+				"readable-stream": "2.3.6"
 			}
 		},
 		"bindings": {
@@ -32,11 +32,12 @@
 			"integrity": "sha512-DpLh5EzMR2kzvX1KIlVC0VkC3iZtHKTgdtZ0a3pglBZdaQFjt5S9g9xd1lE+YvXyfd6mtCeRnrUfOLYiTMlNSw=="
 		},
 		"bl": {
-			"version": "1.2.1",
-			"resolved": "https://registry.npmjs.org/bl/-/bl-1.2.1.tgz",
-			"integrity": "sha1-ysMo977kVzDUBLaSID/LWQ4XLV4=",
+			"version": "1.2.2",
+			"resolved": "https://registry.npmjs.org/bl/-/bl-1.2.2.tgz",
+			"integrity": "sha512-e8tQYnZodmebYDWGH7KMRvtzKXaJHx3BbilrgZCfvyLUYdKpK1t5PSPmpkny/SgiTSCnjfLW7v5rlONXVFkQEA==",
 			"requires": {
-				"readable-stream": "2.3.3"
+				"readable-stream": "2.3.6",
+				"safe-buffer": "5.1.1"
 			}
 		},
 		"chownr": {
@@ -59,6 +60,14 @@
 			"resolved": "https://registry.npmjs.org/core-util-is/-/core-util-is-1.0.2.tgz",
 			"integrity": "sha1-tf1UIgqivFq1eqtxQMlAdUUDwac="
 		},
+		"decompress-response": {
+			"version": "3.3.0",
+			"resolved": "https://registry.npmjs.org/decompress-response/-/decompress-response-3.3.0.tgz",
+			"integrity": "sha1-gKTdMjdIOEv6JICDYirt7Jgq3/M=",
+			"requires": {
+				"mimic-response": "1.0.0"
+			}
+		},
 		"deep-extend": {
 			"version": "0.4.2",
 			"resolved": "https://registry.npmjs.org/deep-extend/-/deep-extend-0.4.2.tgz",
@@ -69,10 +78,15 @@
 			"resolved": "https://registry.npmjs.org/delegates/-/delegates-1.0.0.tgz",
 			"integrity": "sha1-hMbhWbgZBP3KWaDvRM2HDTElD5o="
 		},
+		"detect-libc": {
+			"version": "1.0.3",
+			"resolved": "https://registry.npmjs.org/detect-libc/-/detect-libc-1.0.3.tgz",
+			"integrity": "sha1-+hN8S9aY7fVc1c0CrFWfkaTEups="
+		},
 		"end-of-stream": {
-			"version": "1.4.0",
-			"resolved": "https://registry.npmjs.org/end-of-stream/-/end-of-stream-1.4.0.tgz",
-			"integrity": "sha1-epDYM+/abPpurA9JSduw+tOmMgY=",
+			"version": "1.4.1",
+			"resolved": "https://registry.npmjs.org/end-of-stream/-/end-of-stream-1.4.1.tgz",
+			"integrity": "sha512-1MkrZNvWTKCaigbn+W15elq2BB/L22nqrSY5DKlo3X6+vclJm8Bb5djXJBmEX6fS3+zCh/F4VBK5Z2KxJt4s2Q==",
 			"requires": {
 				"once": "1.4.0"
 			}
@@ -113,9 +127,9 @@
 			"integrity": "sha1-Yzwsg+PaQqUC9SRmAiSA9CCCYd4="
 		},
 		"ini": {
-			"version": "1.3.4",
-			"resolved": "https://registry.npmjs.org/ini/-/ini-1.3.4.tgz",
-			"integrity": "sha1-BTfLedr1m1mhpRff9wbIbsA5Fi4="
+			"version": "1.3.5",
+			"resolved": "https://registry.npmjs.org/ini/-/ini-1.3.5.tgz",
+			"integrity": "sha512-RZY5huIKCMRWDUqZlEi72f/lmXKMvuszcMBduliQ3nnWbx9X/ZBQO7DijMEYS9EhHBb2qacRUMtC7svLwe0lcw=="
 		},
 		"is-fullwidth-code-point": {
 			"version": "1.0.0",
@@ -130,6 +144,11 @@
 			"resolved": "https://registry.npmjs.org/isarray/-/isarray-1.0.0.tgz",
 			"integrity": "sha1-u5NdSFgsuhaMBoNJV6VKPgcSTxE="
 		},
+		"mimic-response": {
+			"version": "1.0.0",
+			"resolved": "https://registry.npmjs.org/mimic-response/-/mimic-response-1.0.0.tgz",
+			"integrity": "sha1-3z02Uqc/3ta5sLJBRub9BSNTRY4="
+		},
 		"minimist": {
 			"version": "1.2.0",
 			"resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz",
@@ -151,14 +170,17 @@
 			}
 		},
 		"nan": {
-			"version": "2.7.0",
-			"resolved": "https://registry.npmjs.org/nan/-/nan-2.7.0.tgz",
-			"integrity": "sha1-2Vv3IeyHfgjbJ27T/G63j5CDrUY="
+			"version": "2.10.0",
+			"resolved": "https://registry.npmjs.org/nan/-/nan-2.10.0.tgz",
+			"integrity": "sha512-bAdJv7fBLhWC+/Bls0Oza+mvTaNQtP+1RyhhhvD95pgUJz6XM5IzgmxOkItJ9tkoCiplvAnXI1tNmmUD/eScyA=="
 		},
 		"node-abi": {
-			"version": "2.1.1",
-			"resolved": "https://registry.npmjs.org/node-abi/-/node-abi-2.1.1.tgz",
-			"integrity": "sha512-6oxV13poCOv7TfGvhsSz6XZWpXeKkdGVh72++cs33OfMh3KAX8lN84dCvmqSETyDXAFcUHtV7eJrgFBoOqZbNQ=="
+			"version": "2.3.0",
+			"resolved": "https://registry.npmjs.org/node-abi/-/node-abi-2.3.0.tgz",
+			"integrity": "sha512-zwm6vU3SsVgw3e9fu48JBaRBCJGIvAgysDsqtf5+vEexFE71bEOtaMWb5zr/zODZNzTPtQlqUUpC79k68Hspow==",
+			"requires": {
+				"semver": "5.5.0"
+			}
 		},
 		"node-hid": {
 			"version": "0.5.7",
@@ -166,8 +188,8 @@
 			"integrity": "sha512-dwwpOetL2+MGYgivbO22ML+45ieCGbueWv1rYxRgBoEc2QMp6UF6ZucEkYts1IA3YPWJNkmpGh6dqQ85n19szw==",
 			"requires": {
 				"bindings": "1.3.0",
-				"nan": "2.7.0",
-				"prebuild-install": "2.3.0"
+				"nan": "2.10.0",
+				"prebuild-install": "2.5.1"
 			}
 		},
 		"noop-logger": {
@@ -210,62 +232,63 @@
 			"integrity": "sha1-/7xJiDNuDoM94MFox+8VISGqf7M="
 		},
 		"prebuild-install": {
-			"version": "2.3.0",
-			"resolved": "https://registry.npmjs.org/prebuild-install/-/prebuild-install-2.3.0.tgz",
-			"integrity": "sha512-gzjq2oHB8oMbzJSsSh9MQ64zrXZGt092/uT4TLZlz2qnrPxpWqp4vYB7LZrDxnlxf5RfbCjkgDI/z0EIVuYzAw==",
+			"version": "2.5.1",
+			"resolved": "https://registry.npmjs.org/prebuild-install/-/prebuild-install-2.5.1.tgz",
+			"integrity": "sha512-3DX9L6pzwc1m1ksMkW3Ky2WLgPQUBiySOfXVl3WZyAeJSyJb4wtoH9OmeRGcubAWsMlLiL8BTHbwfm/jPQE9Ag==",
 			"requires": {
+				"detect-libc": "1.0.3",
 				"expand-template": "1.1.0",
 				"github-from-package": "0.0.0",
 				"minimist": "1.2.0",
 				"mkdirp": "0.5.1",
-				"node-abi": "2.1.1",
+				"node-abi": "2.3.0",
 				"noop-logger": "0.1.1",
 				"npmlog": "4.1.2",
 				"os-homedir": "1.0.2",
-				"pump": "1.0.2",
-				"rc": "1.2.2",
-				"simple-get": "1.4.3",
+				"pump": "2.0.1",
+				"rc": "1.2.6",
+				"simple-get": "2.7.0",
 				"tar-fs": "1.16.0",
 				"tunnel-agent": "0.6.0",
-				"xtend": "4.0.1"
+				"which-pm-runs": "1.0.0"
 			}
 		},
 		"process-nextick-args": {
-			"version": "1.0.7",
-			"resolved": "https://registry.npmjs.org/process-nextick-args/-/process-nextick-args-1.0.7.tgz",
-			"integrity": "sha1-FQ4gt1ZZCtP5EJPyWk8q2L/zC6M="
+			"version": "2.0.0",
+			"resolved": "https://registry.npmjs.org/process-nextick-args/-/process-nextick-args-2.0.0.tgz",
+			"integrity": "sha512-MtEC1TqN0EU5nephaJ4rAtThHtC86dNN9qCuEhtshvpVBkAW5ZO7BASN9REnF9eoXGcRub+pFuKEpOHE+HbEMw=="
 		},
 		"pump": {
-			"version": "1.0.2",
-			"resolved": "https://registry.npmjs.org/pump/-/pump-1.0.2.tgz",
-			"integrity": "sha1-Oz7mUS+U8OV1U4wXmV+fFpkKXVE=",
+			"version": "2.0.1",
+			"resolved": "https://registry.npmjs.org/pump/-/pump-2.0.1.tgz",
+			"integrity": "sha512-ruPMNRkN3MHP1cWJc9OWr+T/xDP0jhXYCLfJcBuX54hhfIBnaQmAUMfDcG4DM5UMWByBbJY69QSphm3jtDKIkA==",
 			"requires": {
-				"end-of-stream": "1.4.0",
+				"end-of-stream": "1.4.1",
 				"once": "1.4.0"
 			}
 		},
 		"rc": {
-			"version": "1.2.2",
-			"resolved": "https://registry.npmjs.org/rc/-/rc-1.2.2.tgz",
-			"integrity": "sha1-2M6ctX6NZNnHut2YdsfDTL48cHc=",
+			"version": "1.2.6",
+			"resolved": "https://registry.npmjs.org/rc/-/rc-1.2.6.tgz",
+			"integrity": "sha1-6xiYnG1PTxYsOZ953dKfODVWgJI=",
 			"requires": {
 				"deep-extend": "0.4.2",
-				"ini": "1.3.4",
+				"ini": "1.3.5",
 				"minimist": "1.2.0",
 				"strip-json-comments": "2.0.1"
 			}
 		},
 		"readable-stream": {
-			"version": "2.3.3",
-			"resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.3.tgz",
-			"integrity": "sha512-m+qzzcn7KUxEmd1gMbchF+Y2eIUbieUaxkWtptyHywrX0rE8QEYqPC07Vuy4Wm32/xE16NcdBctb8S0Xe/5IeQ==",
+			"version": "2.3.6",
+			"resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.6.tgz",
+			"integrity": "sha512-tQtKA9WIAhBF3+VLAseyMqZeBjW0AHJoxOtYqSUZNJxauErmLbVm2FW1y+J/YA9dUrAC39ITejlZWhVIwawkKw==",
 			"requires": {
 				"core-util-is": "1.0.2",
 				"inherits": "2.0.3",
 				"isarray": "1.0.0",
-				"process-nextick-args": "1.0.7",
+				"process-nextick-args": "2.0.0",
 				"safe-buffer": "5.1.1",
-				"string_decoder": "1.0.3",
+				"string_decoder": "1.1.1",
 				"util-deprecate": "1.0.2"
 			}
 		},
@@ -274,6 +297,11 @@
 			"resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.1.tgz",
 			"integrity": "sha512-kKvNJn6Mm93gAczWVJg7wH+wGYWNrDHdWvpUmHyEsgCtIwwo3bqPtV4tR5tuPaUhTOo/kvhVwd8XwwOllGYkbg=="
 		},
+		"semver": {
+			"version": "5.5.0",
+			"resolved": "https://registry.npmjs.org/semver/-/semver-5.5.0.tgz",
+			"integrity": "sha512-4SJ3dm0WAwWy/NVeioZh5AntkdJoWKxHxcmyP622fOkgHa4z3R0TdBJICINyaSDE6uNwVc8gZr+ZinwZAH4xIA=="
+		},
 		"set-blocking": {
 			"version": "2.0.0",
 			"resolved": "https://registry.npmjs.org/set-blocking/-/set-blocking-2.0.0.tgz",
@@ -284,14 +312,19 @@
 			"resolved": "https://registry.npmjs.org/signal-exit/-/signal-exit-3.0.2.tgz",
 			"integrity": "sha1-tf3AjxKH6hF4Yo5BXiUTK3NkbG0="
 		},
+		"simple-concat": {
+			"version": "1.0.0",
+			"resolved": "https://registry.npmjs.org/simple-concat/-/simple-concat-1.0.0.tgz",
+			"integrity": "sha1-c0TLuLbib7J9ZrL8hvn21Zl1IcY="
+		},
 		"simple-get": {
-			"version": "1.4.3",
-			"resolved": "https://registry.npmjs.org/simple-get/-/simple-get-1.4.3.tgz",
-			"integrity": "sha1-6XVe2kB+ltpAxeUVjJ6jezO+y+s=",
+			"version": "2.7.0",
+			"resolved": "https://registry.npmjs.org/simple-get/-/simple-get-2.7.0.tgz",
+			"integrity": "sha512-RkE9rGPHcxYZ/baYmgJtOSM63vH0Vyq+ma5TijBcLla41SWlh8t6XYIGMR/oeZcmr+/G8k+zrClkkVrtnQ0esg==",
 			"requires": {
+				"decompress-response": "3.3.0",
 				"once": "1.4.0",
-				"unzip-response": "1.0.2",
-				"xtend": "4.0.1"
+				"simple-concat": "1.0.0"
 			}
 		},
 		"string-width": {
@@ -305,9 +338,9 @@
 			}
 		},
 		"string_decoder": {
-			"version": "1.0.3",
-			"resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.0.3.tgz",
-			"integrity": "sha512-4AH6Z5fzNNBcH+6XDMfA/BTt87skxqJlO0lAh3Dker5zThcAxG6mKz+iGu308UKoPPQ8Dcqx/4JhujzltRa+hQ==",
+			"version": "1.1.1",
+			"resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
+			"integrity": "sha512-n/ShnvDi6FHbbVfviro+WojiFzv+s8MPMHBczVePfUpDJLwoLT0ht1l4YwBCbi8pJAveEEdnkHyPyTP/mzRfwg==",
 			"requires": {
 				"safe-buffer": "5.1.1"
 			}
@@ -332,18 +365,29 @@
 			"requires": {
 				"chownr": "1.0.1",
 				"mkdirp": "0.5.1",
-				"pump": "1.0.2",
-				"tar-stream": "1.5.4"
+				"pump": "1.0.3",
+				"tar-stream": "1.5.5"
+			},
+			"dependencies": {
+				"pump": {
+					"version": "1.0.3",
+					"resolved": "https://registry.npmjs.org/pump/-/pump-1.0.3.tgz",
+					"integrity": "sha512-8k0JupWme55+9tCVE+FS5ULT3K6AbgqrGa58lTT49RpyfwwcGedHqaC5LlQNdEAumn/wFsu6aPwkuPMioy8kqw==",
+					"requires": {
+						"end-of-stream": "1.4.1",
+						"once": "1.4.0"
+					}
+				}
 			}
 		},
 		"tar-stream": {
-			"version": "1.5.4",
-			"resolved": "https://registry.npmjs.org/tar-stream/-/tar-stream-1.5.4.tgz",
-			"integrity": "sha1-NlSc8E7RrumyowwBQyUiONr5QBY=",
+			"version": "1.5.5",
+			"resolved": "https://registry.npmjs.org/tar-stream/-/tar-stream-1.5.5.tgz",
+			"integrity": "sha512-mQdgLPc/Vjfr3VWqWbfxW8yQNiJCbAZ+Gf6GDu1Cy0bdb33ofyiNGBtAY96jHFhDuivCwgW1H9DgTON+INiXgg==",
 			"requires": {
-				"bl": "1.2.1",
-				"end-of-stream": "1.4.0",
-				"readable-stream": "2.3.3",
+				"bl": "1.2.2",
+				"end-of-stream": "1.4.1",
+				"readable-stream": "2.3.6",
 				"xtend": "4.0.1"
 			}
 		},
@@ -355,16 +399,16 @@
 				"safe-buffer": "5.1.1"
 			}
 		},
-		"unzip-response": {
-			"version": "1.0.2",
-			"resolved": "https://registry.npmjs.org/unzip-response/-/unzip-response-1.0.2.tgz",
-			"integrity": "sha1-uYTwh3/AqJwsdzzB73tbIytbBv4="
-		},
 		"util-deprecate": {
 			"version": "1.0.2",
 			"resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
 			"integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8="
 		},
+		"which-pm-runs": {
+			"version": "1.0.0",
+			"resolved": "https://registry.npmjs.org/which-pm-runs/-/which-pm-runs-1.0.0.tgz",
+			"integrity": "sha1-Zws6+8VS4LVd9rd4DKdGFfI60cs="
+		},
 		"wide-align": {
 			"version": "1.1.2",
 			"resolved": "https://registry.npmjs.org/wide-align/-/wide-align-1.1.2.tgz",
--- a/packages/uhk-usb/src/constants.ts
+++ b/packages/uhk-usb/src/constants.ts
@@ -1,6 +1,7 @@
 export namespace Constants {
    export const VENDOR_ID = 0x1D50;
    export const PRODUCT_ID = 0x6122;
+    export const BOOTLOADER_ID = 0x6120;
    export const MAX_PAYLOAD_SIZE = 64;
 }

@@ -22,7 +23,12 @@ export enum UsbCommand {
    GetDebugBuffer           = 0x0b,
    GetAdcValue              = 0x0c,
    SetLedPwmBrightness      = 0x0d,
-    GetModuleProperties      = 0x0e
+    GetModuleProperty        = 0x0e,
+    GetSlaveI2cErrors        = 0x0f,
+    SetI2cBaudRate           = 0x10,
+    SwitchKeymap             = 0x11,
+    GetVariable              = 0x12,
+    SetVariable              = 0x13
 }

 export enum EepromOperation {
@@ -81,3 +87,14 @@ export enum KbootCommands {
    ping = 1,
    reset = 2
 }
+
+export enum ModulePropertyId {
+    protocolVersions = 0
+}
+
+export enum UsbVariables {
+    testSwitches = 0,
+    testUsbStack = 1,
+    debounceTimePress = 2,
+    debounceTimeRelease = 3
+}
--- a/packages/uhk-usb/src/uhk-blhost.ts
+++ b/packages/uhk-usb/src/uhk-blhost.ts
@@ -49,7 +49,7 @@ export class UhkBlhost {

                self.logService.debug(`[blhost] FINISHED: ${code}`);

-                if (code !== null && code !== 0) {
+                if (code !== 0) {
                    return reject(new Error(`blhost error code:${code}`));
                }

--- a/packages/uhk-usb/src/uhk-hid-device.ts
+++ b/packages/uhk-usb/src/uhk-hid-device.ts
@@ -1,5 +1,5 @@
 import { Device, devices, HID } from 'node-hid';
-import { LogService } from 'uhk-common';
+import { CommandLineArgs, DeviceConnectionState, isEqualArray, LogService } from 'uhk-common';

 import {
    ConfigBufferId,
@@ -10,9 +10,10 @@ import {
    KbootCommands,
    ModuleSlotToI2cAddress,
    ModuleSlotToId,
-    UsbCommand
+    UsbCommand,
+    UsbVariables
 } from './constants';
-import { bufferToString, getTransferData, retry, snooze } from './util';
+import { bufferToString, getTransferData, isUhkDevice, retry, snooze } from './util';

 export const BOOTLOADER_TIMEOUT_MS = 5000;

@@ -24,10 +25,12 @@ export class UhkHidDevice {
     * Internal variable that represent the USB UHK device
     * @private
     */
+    private _prevDevices = [];
    private _device: HID;
    private _hasPermission = false;

-    constructor(private logService: LogService) {
+    constructor(private logService: LogService,
+                private options: CommandLineArgs) {
    }

    /**
@@ -38,17 +41,25 @@ export class UhkHidDevice {
     * @returns {boolean}
     */
    public hasPermission(): boolean {
+        if (this.options.spe) {
+            return false;
+        }
+
        try {
            if (this._hasPermission) {
                return true;
            }

-            if (!this.deviceConnected()) {
+            const dev = devices().find((x: Device) => isUhkDevice(x) || x.productId === Constants.BOOTLOADER_ID);
+
+            if (!dev) {
                return true;
            }

-            this._hasPermission = this.getDevice() !== null;
-            this.close();
+            const device = new HID(dev.path);
+            device.close();
+
+            this._hasPermission = true;

            return this._hasPermission;
        } catch (err) {
@@ -62,15 +73,24 @@ export class UhkHidDevice {
     * Return with true is an UHK Device is connected to the computer.
     * @returns {boolean}
     */
-    public deviceConnected(): boolean {
-        const connected = devices().some((dev: Device) => dev.vendorId === Constants.VENDOR_ID &&
-            dev.productId === Constants.PRODUCT_ID);
+    public getDeviceConnectionState(): DeviceConnectionState {
+        const devs = devices();
+        const result: DeviceConnectionState = {
+            bootloaderActive: false,
+            connected: false,
+            hasPermission: this.hasPermission()
+        };

-        if (!connected) {
-            this._hasPermission = false;
+        for (const dev of devs) {
+            if (isUhkDevice(dev)) {
+                result.connected = true;
+            } else if (dev.vendorId === Constants.VENDOR_ID &&
+                dev.productId === Constants.BOOTLOADER_ID) {
+                result.bootloaderActive = true;
+            }
        }

-        return connected;
+        return result;
    }

    /**
@@ -90,6 +110,7 @@ export class UhkHidDevice {
            device.read((err: any, receivedData: Array<number>) => {
                if (err) {
                    this.logService.error('[UhkHidDevice] Transfer error: ', err);
+                    this.close();
                    return reject(err);
                }
                const logString = bufferToString(receivedData);
@@ -113,6 +134,11 @@ export class UhkHidDevice {
        await this.waitUntilKeyboardBusy();
    }

+    public async enableUsbStackTest(): Promise<void> {
+        await this.write(new Buffer([UsbCommand.SetVariable, UsbVariables.testUsbStack, 1]));
+        await this.waitUntilKeyboardBusy();
+    }
+
    /**
     * Close the communication chanel with UHK Device
     */
@@ -137,6 +163,10 @@ export class UhkHidDevice {
        }
    }

+    public resetDeviceCache(): void {
+        this._prevDevices = [];
+    }
+
    async reenumerate(enumerationMode: EnumerationModes): Promise<void> {
        const reenumMode = EnumerationModes[enumerationMode].toString();
        this.logService.debug(`[UhkHidDevice] Start reenumeration, mode: ${reenumMode}`);
@@ -192,7 +222,7 @@ export class UhkHidDevice {

    async sendKbootCommandToModule(module: ModuleSlotToI2cAddress, command: KbootCommands, maxTry = 1): Promise<any> {
        let transfer;
-        const moduleName = kbootKommandName(module);
+        const moduleName = kbootCommandName(module);
        this.logService.debug(`[UhkHidDevice] USB[T]: Send KbootCommand ${moduleName} ${KbootCommands[command].toString()}`);
        if (command === KbootCommands.idle) {
            transfer = new Buffer([UsbCommand.SendKbootCommandToModule, command]);
@@ -228,19 +258,24 @@ export class UhkHidDevice {
    private connectToDevice(): HID {
        try {
            const devs = devices();
-            this.logService.debug('[UhkHidDevice] Available devices:', devs);
+            if (!isEqualArray(this._prevDevices, devs)) {
+                this.logService.debug('[UhkHidDevice] Available devices:');
+                for (const logDevice of devs) {
+                    this.logService.debug(JSON.stringify(logDevice));
+                }
+                this._prevDevices = devs;
+            } else {
+                this.logService.debug('[UhkHidDevice] Available devices unchanged');
+            }

-            const dev = devs.find((x: Device) =>
-                x.vendorId === Constants.VENDOR_ID &&
-                x.productId === Constants.PRODUCT_ID &&
-                ((x.usagePage === 128 && x.usage === 129) || x.interface === 0));
+            const dev = devs.find(isUhkDevice);

            if (!dev) {
                this.logService.debug('[UhkHidDevice] UHK Device not found:');
                return null;
            }
            const device = new HID(dev.path);
-            this.logService.debug('[UhkHidDevice] Used device:', dev);
+            this.logService.debug('[UhkHidDevice] Used device:', JSON.stringify(dev));
            return device;
        }
        catch (err) {
@@ -251,7 +286,7 @@ export class UhkHidDevice {
    }
 }

-function kbootKommandName(module: ModuleSlotToI2cAddress): string {
+function kbootCommandName(module: ModuleSlotToI2cAddress): string {
    switch (module) {
        case ModuleSlotToI2cAddress.leftHalf:
            return 'leftHalf';
@@ -262,7 +297,7 @@ function kbootKommandName(module: ModuleSlotToI2cAddress): string {
        case ModuleSlotToI2cAddress.rightAddon:
            return 'rightAddon';

-        default :
+        default:
            return 'Unknown';
    }
 }
--- a/packages/uhk-usb/src/uhk-operations.ts
+++ b/packages/uhk-usb/src/uhk-operations.ts
@@ -1,7 +1,15 @@
-import { LogService } from 'uhk-common';
-import { EnumerationModes, EnumerationNameToProductId, KbootCommands, ModuleSlotToI2cAddress, ModuleSlotToId } from './constants';
+import { HardwareModuleInfo, LogService, UhkBuffer } from 'uhk-common';
+import {
+    EnumerationModes,
+    EnumerationNameToProductId,
+    KbootCommands,
+    ModulePropertyId,
+    ModuleSlotToI2cAddress,
+    ModuleSlotToId
+} from './constants';
 import * as path from 'path';
 import * as fs from 'fs';
+import * as os from 'os';
 import { UhkBlhost } from './uhk-blhost';
 import { UhkHidDevice } from './uhk-hid-device';
 import { snooze } from './util';
@@ -22,6 +30,7 @@ export class UhkOperations {
    }

    public async updateRightFirmware(firmwarePath = this.getFirmwarePath()) {
+        this.logService.debug(`[UhkOperations] Operating system: ${os.type()} ${os.release()} ${os.arch()}`);
        this.logService.debug('[UhkOperations] Start flashing right firmware');
        const prefix = [`--usb 0x1d50,0x${EnumerationNameToProductId.bootloader.toString(16)}`];

@@ -50,8 +59,9 @@ export class UhkOperations {

        const leftModuleBricked = await this.waitForKbootIdle();
        if (!leftModuleBricked) {
-            this.logService.error('[UhkOperations] Couldn\'t connect to the left keyboard half.');
-            return;
+            const msg = '[UhkOperations] Couldn\'t connect to the left keyboard half.';
+            this.logService.error(msg);
+            throw new Error(msg);
        }

        await this.device.reenumerate(EnumerationModes.Buspal);
@@ -98,8 +108,6 @@ export class UhkOperations {
     * @returns {Promise<Buffer>}
     */
    public async loadConfiguration(configBufferId: ConfigBufferId): Promise<string> {
-        let response = [];
-
        const configBufferIdToName = ['HardwareConfig', 'StagingUserConfig', 'ValidatedUserConfig'];
        const configName = configBufferIdToName[configBufferId];

@@ -133,7 +141,8 @@ export class UhkOperations {
                    }
                }
            }
-            response = convertBufferToIntArray(configBuffer);
+            const response = convertBufferToIntArray(configBuffer);
+
            return Promise.resolve(JSON.stringify(response));
        } catch (error) {
            const errMsg = `[DeviceOperation] ${configName} from eeprom error`;
@@ -158,10 +167,10 @@ export class UhkOperations {
        return configSize;
    }

-    public async saveUserConfiguration(json: string): Promise<void> {
+    public async saveUserConfiguration(buffer: Buffer): Promise<void> {
        try {
            this.logService.debug('[DeviceOperation] USB[T]: Write user configuration to keyboard');
-            await this.sendUserConfigToKeyboard(json);
+            await this.sendUserConfigToKeyboard(buffer);
            this.logService.debug('[DeviceOperation] USB[T]: Write user configuration to EEPROM');
            await this.device.writeConfigToEeprom(ConfigBufferId.validatedUserConfig);
        }
@@ -193,14 +202,57 @@ export class UhkOperations {
        return false;
    }

+    public async getLeftModuleVersionInfo(): Promise<HardwareModuleInfo> {
+        try {
+            this.logService.debug('[DeviceOperation] USB[T]: Read left module version information');
+
+            const command = new Buffer([
+                UsbCommand.GetModuleProperty,
+                ModuleSlotToId.leftHalf,
+                ModulePropertyId.protocolVersions
+            ]);
+
+            const buffer = await this.device.write(command);
+            const uhkBuffer = UhkBuffer.fromArray(convertBufferToIntArray(buffer));
+            // skip the first 2 byte
+            uhkBuffer.readUInt16();
+
+            return {
+                moduleProtocolVersion: `${uhkBuffer.readUInt16()}.${uhkBuffer.readUInt16()}.${uhkBuffer.readUInt16()}`,
+                firmwareVersion: `${uhkBuffer.readUInt16()}.${uhkBuffer.readUInt16()}.${uhkBuffer.readUInt16()}`
+            };
+        }
+        catch (error) {
+            this.logService.error('[DeviceOperation] Could not read left module version information', error);
+        }
+
+        return {
+            moduleProtocolVersion: '',
+            firmwareVersion: ''
+        };
+    }
+
+    public async getRightModuleVersionInfo(): Promise<HardwareModuleInfo> {
+        this.logService.debug('[DeviceOperation] USB[T]: Read right module version information');
+
+        const command = new Buffer([UsbCommand.GetProperty, DevicePropertyIds.ProtocolVersions]);
+        const buffer = await this.device.write(command);
+        const uhkBuffer = UhkBuffer.fromArray(convertBufferToIntArray(buffer));
+        // skip the first byte
+        uhkBuffer.readUInt8();
+
+        return {
+            firmwareVersion: `${uhkBuffer.readUInt16()}.${uhkBuffer.readUInt16()}.${uhkBuffer.readUInt16()}`
+        };
+    }
+
    /**
     * IpcMain handler. Send the UserConfiguration to the UHK Device and send a response with the result.
-     * @param {string} json - UserConfiguration in JSON format
+     * @param {Buffer} buffer - UserConfiguration buffer
     * @returns {Promise<void>}
     * @private
     */
-    private async sendUserConfigToKeyboard(json: string): Promise<void> {
-        const buffer: Buffer = new Buffer(JSON.parse(json).data);
+    private async sendUserConfigToKeyboard(buffer: Buffer): Promise<void> {
        const fragments = getTransferBuffers(UsbCommand.WriteStagingUserConfig, buffer);
        for (const fragment of fragments) {
            await this.device.write(fragment);
--- a/packages/uhk-usb/src/util.ts
+++ b/packages/uhk-usb/src/util.ts
@@ -1,5 +1,7 @@
+import { Device } from 'node-hid';
+import { DeviceConnectionState, LogService } from 'uhk-common';
+
 import { Constants, UsbCommand } from './constants';
-import { LogService } from 'uhk-common';

 export const snooze = ms => new Promise(resolve => setTimeout(resolve, ms));

@@ -75,7 +77,6 @@ export async function retry(command: Function, maxTry = 3, logService?: LogServi
        try {
            // logService.debug(`[retry] try to run FUNCTION:\n ${command}, \n retry: ${retryCount}`);
            await command();
-            await snooze(100);
            // logService.debug(`[retry] success FUNCTION:\n ${command}, \n retry: ${retryCount}`);
            return;
        } catch (err) {
@@ -91,7 +92,23 @@ export async function retry(command: Function, maxTry = 3, logService?: LogServi
                if (logService) {
                    logService.info(`[retry] failed, but try run FUNCTION:\n ${command}, \n retry: ${retryCount}`);
                }
+                await snooze(100);
            }
        }
    }
 }
+
+export const deviceConnectionStateComparer = (a: DeviceConnectionState, b: DeviceConnectionState): boolean => {
+    return a.hasPermission === b.hasPermission
+        && a.connected === b.connected
+        && a.bootloaderActive === b.bootloaderActive;
+};
+
+export const isUhkDevice = (dev: Device): boolean => {
+    return dev.vendorId === Constants.VENDOR_ID &&
+    dev.productId === Constants.PRODUCT_ID &&
+    // hidapi can not read the interface number on Mac, so check the usage page and usage
+    ((dev.usagePage === 128 && dev.usage === 129) || // Old firmware
+        (dev.usagePage === (0xFF00 | 0x00) && dev.usage === 0x01) || // New firmware
+        dev.interface === 0);
+};
--- a/packages/uhk-web/.angular-cli.json
+++ b/packages/uhk-web/.angular-cli.json
@@ -26,7 +26,6 @@
      ],
      "scripts": [
        "../node_modules/bootstrap/dist/js/bootstrap.js",
-        "../node_modules/select2/dist/js/select2.full.js",
        "../node_modules/nouislider/distribute/nouislider.js"
      ],
      "environmentSource": "environments/environment.ts",
--- a/packages/uhk-web/package-lock.json
+++ b/packages/uhk-web/package-lock.json
--- a/packages/uhk-web/package.json
+++ b/packages/uhk-web/package.json
@@ -10,22 +10,24 @@
    "lint": "ng lint",
    "e2e": "ng e2e",
    "build:renderer": "webpack --config webpack.config.js",
-    "server:renderer": "webpack --config webpack.config.js --watch"
+    "server:renderer": "webpack --config webpack.config.js --watch",
+    "pree2e": "webdriver-manager update --standalone false --gecko false --quiet"
  },
  "private": true,
  "devDependencies": {
-    "@angular/animations": "4.4.5",
-    "@angular/cli": "1.4.7",
-    "@angular/common": "4.4.5",
-    "@angular/compiler": "4.4.5",
-    "@angular/compiler-cli": "4.4.5",
-    "@angular/core": "4.4.5",
-    "@angular/forms": "4.4.5",
-    "@angular/http": "4.4.5",
-    "@angular/language-service": "4.4.5",
-    "@angular/platform-browser": "4.4.5",
-    "@angular/platform-browser-dynamic": "4.4.5",
-    "@angular/router": "4.4.5",
+    "@angular/animations": "5.2.9",
+    "@angular/cli": "1.7.4",
+    "@angular/common": "5.2.9",
+    "@angular/compiler": "5.2.9",
+    "@angular/compiler-cli": "5.2.9",
+    "@angular/core": "5.2.9",
+    "@angular-devkit/build-optimizer": "0.3.2",
+    "@angular/forms": "5.2.9",
+    "@angular/http": "5.2.9",
+    "@angular/language-service": "5.2.9",
+    "@angular/platform-browser": "5.2.9",
+    "@angular/platform-browser-dynamic": "5.2.9",
+    "@angular/router": "5.2.9",
    "@ngrx/effects": "4.0.5",
    "@ngrx/router-store": "4.0.4",
    "@ngrx/store": "4.0.3",
@@ -37,65 +39,42 @@
    "@types/jasmine": "2.5.53",
    "@types/jasminewd2": "2.0.2",
    "@types/jquery": "3.2.9",
-    "@types/lodash-es": "4.17.0",
-    "@types/node-hid": "0.5.2",
    "@types/usb": "1.1.3",
    "angular-confirmation-popover": "3.2.0",
    "angular-notifier": "2.0.0",
-    "autoprefixer": "6.5.3",
+    "autoprefixer": "^7.2.3",
    "bootstrap": "3.3.7",
    "buffer": "5.0.6",
-    "circular-dependency-plugin": "3.0.0",
+    "circular-dependency-plugin": "^4.2.1",
    "codelyzer": "3.0.1",
-    "copy-webpack-plugin": "4.0.1",
-    "css-loader": "0.28.1",
-    "cssnano": "3.10.0",
    "dragula": "3.7.2",
-    "exports-loader": "0.6.3",
-    "file-loader": "0.10.0",
-    "file-saver": "1.3.3",
    "font-awesome": "4.7.0",
-    "html-webpack-plugin": "2.29.0",
-    "istanbul-instrumenter-loader": "2.0.0",
+    "html-webpack-plugin": "^2.29.0",
    "jasmine-core": "2.6.2",
    "jasmine-spec-reporter": "4.1.0",
    "jquery": "3.2.1",
    "jsonfile": "3.0.1",
    "karma": "1.7.0",
    "karma-chrome-launcher": "2.1.1",
-    "karma-cli": "1.0.1",
    "karma-coverage-istanbul-reporter": "1.2.1",
    "karma-jasmine": "1.1.0",
    "karma-jasmine-html-reporter": "0.2.2",
-    "less-loader": "4.0.5",
-    "lodash-es": "4.17.4",
    "ng2-dragula": "1.5.0",
-    "ng2-nouislider": "^1.7.6",
-    "ng2-select2": "1.0.0-beta.10",
+    "ng2-nouislider": "^1.7.7",
+    "ngx-clipboard": "10.0.0",
+    "@ert78gb/ngx-select-ex": "3.7.0",
    "ngrx-store-freeze": "0.1.9",
-    "node-hid": "0.5.4",
-    "nouislider": "^10.1.0",
-    "postcss-loader": "1.3.3",
-    "postcss-url": "5.1.2",
+    "nouislider": "^11.1.0",
+    "postcss-url": "^7.1.2",
    "protractor": "5.1.2",
-    "raw-loader": "0.5.1",
    "reselect": "3.0.1",
-    "sass-loader": "6.0.3",
-    "script-loader": "0.7.0",
-    "select2": "4.0.3",
-    "source-map-loader": "0.2.0",
-    "style-loader": "0.13.1",
-    "stylus-loader": "3.0.1",
-    "sudo-prompt": "7.1.1",
-    "ts-loader": "2.3.1",
-    "ts-node": "3.0.4",
+    "rxjs": "5.5.8",
+    "typescript": "2.6.2",
    "uhk-common": "1.0.0",
-    "url-loader": "0.5.7",
-    "webpack": "3.4.1",
-    "webpack-dev-server": "2.5.1",
-    "webpack-svgstore-plugin": "4.0.1",
    "xml-loader": "1.2.1",
-    "zone.js": "0.8.14"
+    "zone.js": "0.8.26",
+    "@angular-devkit/core": "0.3.2",
+    "@ngtools/webpack": "1.10.2"
  },
  "dependencies": {
    "classlist.js": "1.1.20150312",
--- a/packages/uhk-web/src/app/app.component.html
+++ b/packages/uhk-web/src/app/app.component.html
@@ -9,7 +9,7 @@
 </div>
 <notifier-container></notifier-container>
 <progress-button class="save-to-keyboard-button"
-                 *ngIf="(saveToKeyboardState$ | async).showButton"
+                 *ngIf="saveToKeyboardState.showButton"
                 [@showSaveToKeyboardButton]
-                 [state]="saveToKeyboardState$ | async"
+                 [state]="saveToKeyboardState"
                 (clicked)="clickedOnProgressButton($event)"></progress-button>
--- a/packages/uhk-web/src/app/app.component.ts
+++ b/packages/uhk-web/src/app/app.component.ts
@@ -1,11 +1,13 @@
-import { Component, HostListener, ViewEncapsulation } from '@angular/core';
+import { Component, HostListener, ViewEncapsulation, OnDestroy } from '@angular/core';
 import { animate, style, transition, trigger } from '@angular/animations';
 import { Observable } from 'rxjs/Observable';
+import { Subscription } from 'rxjs/Subscription';
 import { Action, Store } from '@ngrx/store';

 import 'rxjs/add/operator/last';

 import { DoNotUpdateAppAction, UpdateAppAction } from './store/actions/app-update.action';
+import { EnableUsbStackTestAction } from './store/actions/device';
 import {
    AppState,
    getShowAppUpdateAvailable,
@@ -14,7 +16,6 @@ import {
    saveToKeyboardState
 } from './store';
 import { ProgressButtonState } from './store/reducers/progress-button-state';
-import { SaveUserConfigInBinaryFileAction, SaveUserConfigInJsonFileAction } from './store/actions/user-config';

@Component({
    selector: 'main-app',
@@ -35,17 +36,44 @@ import { SaveUserConfigInBinaryFileAction, SaveUserConfigInJsonFileAction } from
            ])
    ]
 })
-export class MainAppComponent {
+export class MainAppComponent implements OnDestroy {
    showUpdateAvailable$: Observable<boolean>;
    deviceConfigurationLoaded$: Observable<boolean>;
    runningInElectron$: Observable<boolean>;
-    saveToKeyboardState$: Observable<ProgressButtonState>;
+    saveToKeyboardState: ProgressButtonState;
+
+    private saveToKeyboardStateSubscription: Subscription;

    constructor(private store: Store<AppState>) {
        this.showUpdateAvailable$ = store.select(getShowAppUpdateAvailable);
        this.deviceConfigurationLoaded$ = store.select(deviceConfigurationLoaded);
        this.runningInElectron$ = store.select(runningInElectron);
-        this.saveToKeyboardState$ = store.select(saveToKeyboardState);
+        this.saveToKeyboardStateSubscription = store.select(saveToKeyboardState)
+            .subscribe(data => this.saveToKeyboardState = data);
+    }
+
+    ngOnDestroy(): void {
+        this.saveToKeyboardStateSubscription.unsubscribe();
+    }
+
+    @HostListener('document:keydown', ['$event'])
+    onKeyDown(event: KeyboardEvent) {
+        if (this.saveToKeyboardState.showButton &&
+            event.ctrlKey &&
+            event.key === 's' &&
+            !event.defaultPrevented) {
+            this.clickedOnProgressButton(this.saveToKeyboardState.action);
+            event.preventDefault();
+        }
+
+        if (event.shiftKey &&
+            event.ctrlKey &&
+            event.metaKey &&
+            event.key === '|' &&
+            !event.defaultPrevented) {
+            this.enableUsbStackTest();
+            event.preventDefault();
+        }
    }

    updateApp() {
@@ -59,4 +87,8 @@ export class MainAppComponent {
    clickedOnProgressButton(action: Action) {
        return this.store.dispatch(action);
    }
+
+    enableUsbStackTest() {
+        this.store.dispatch(new EnableUsbStackTestAction());
+    }
 }
--- a/packages/uhk-web/src/app/app.routes.ts
+++ b/packages/uhk-web/src/app/app.routes.ts
@@ -5,17 +5,19 @@ import { deviceRoutes } from './components/device';
 import { addOnRoutes } from './components/add-on';
 import { keymapRoutes } from './components/keymap';
 import { macroRoutes } from './components/macro';
-import { PrivilegeCheckerComponent } from './components/privilege-checker/privilege-checker.component';
-import { MissingDeviceComponent } from './components/missing-device/missing-device.component';
+import { PrivilegeCheckerComponent } from './components/privilege-checker';
+import { MissingDeviceComponent } from './components/missing-device';
 import { UhkDeviceDisconnectedGuard } from './services/uhk-device-disconnected.guard';
 import { UhkDeviceConnectedGuard } from './services/uhk-device-connected.guard';
 import { UhkDeviceUninitializedGuard } from './services/uhk-device-uninitialized.guard';
 import { UhkDeviceInitializedGuard } from './services/uhk-device-initialized.guard';
 import { MainPage } from './pages/main-page/main.page';
-import { agentRoutes } from './components/agent/agent.routes';
+import { agentRoutes } from './components/agent';
 import { LoadingDevicePageComponent } from './pages/loading-page/loading-device.page';
 import { UhkDeviceLoadingGuard } from './services/uhk-device-loading.guard';
 import { UhkDeviceLoadedGuard } from './services/uhk-device-loaded.guard';
+import { RecoveryModeComponent } from './components/device';
+import { UhkDeviceBootloaderNotActiveGuard } from './services/uhk-device-bootloader-not-active.guard';

 const appRoutes: Routes = [
    {
@@ -33,6 +35,11 @@ const appRoutes: Routes = [
        component: LoadingDevicePageComponent,
        canActivate: [UhkDeviceLoadedGuard]
    },
+    {
+        path: 'recovery-device',
+        component: RecoveryModeComponent,
+        canActivate: [UhkDeviceBootloaderNotActiveGuard]
+    },
    {
        path: '',
        component: MainPage,
--- a/packages/uhk-web/src/app/components/agent/about/about.component.html
+++ b/packages/uhk-web/src/app/components/agent/about/about.component.html
@@ -4,7 +4,7 @@
        <span>About</span>
    </h1>
    <div class="col-xs-12">
-        <div class="agent-version">Agent version: <span class="text-bold">{{version}}</span></div>
-        <div><a class="link-github" (click)="openAgentGitHubPage($event)">Agent on GitHub</a></div>
+        <div class="agent-version">Agent version: <span class="text-bold">{{ version }}</span></div>
+        <div><a class="link-github" [href]="agentGithubUrl" externalUrl>Agent on GitHub</a></div>
    </div>
 </div>
--- a/packages/uhk-web/src/app/components/agent/about/about.component.ts
+++ b/packages/uhk-web/src/app/components/agent/about/about.component.ts
@@ -1,10 +1,7 @@
 import { Component } from '@angular/core';
-import { Store } from '@ngrx/store';
 import { Constants } from 'uhk-common';

-import { AppState } from '../../../store';
 import { getVersions } from '../../../util';
-import { OpenUrlInNewWindowAction } from '../../../store/actions/app';

@Component({
    selector: 'about-page',
@@ -16,12 +13,5 @@ import { OpenUrlInNewWindowAction } from '../../../store/actions/app';
 })
 export class AboutComponent {
    version: string = getVersions().version;
-
-    constructor(private store: Store<AppState>) {
-    }
-
-    openAgentGitHubPage(event) {
-        event.preventDefault();
-        this.store.dispatch(new OpenUrlInNewWindowAction(Constants.AGENT_GITHUB_URL));
-    }
+    agentGithubUrl = Constants.AGENT_GITHUB_URL;
 }
--- a/packages/uhk-web/src/app/components/agent/agent.routes.ts
+++ b/packages/uhk-web/src/app/components/agent/agent.routes.ts
@@ -2,12 +2,17 @@ import { Routes } from '@angular/router';

 import { SettingsComponent } from './settings/settings.component';
 import { AboutComponent } from './about/about.component';
+import { HelpPageComponent } from './help-page/help-page.component';

 export const agentRoutes: Routes = [
    {
        path: 'settings',
        component: SettingsComponent
    },
+    {
+        path: 'help',
+        component: HelpPageComponent
+    },
    {
        path: 'about',
        component: AboutComponent
--- a/packages/uhk-web/src/app/components/agent/help-page/help-page.component.html
+++ b/packages/uhk-web/src/app/components/agent/help-page/help-page.component.html
@@ -0,0 +1,28 @@
+<div class="row">
+    <h1 class="col-xs-12 pane-title">
+        <i class="fa fa-question-circle"></i>
+        <span class="macro__name pane-title__name">Help</span>
+    </h1>
+</div>
+
+<div class="row">
+    <div class="col-xs-12">
+        Frequently asked questions
+        <ul>
+            <li><a href="https://ultimatehackingkeyboard.com/blog/2018/06/23/how-can-i-type-accented-characters-with-my-uhk" externalUrl>How can I type accented characters with my UHK?</a></li>
+        </ul>
+    </div>
+</div>
+
+<div class="row">
+    <div class="col-xs-12">
+        Keyboard shortcuts
+        <ul>
+            <li><kbd>CTRL</kbd> + <kbd>Enter</kbd> = Remap key</li>
+            <li><kbd>CTRL</kbd> + <kbd>S</kbd> = Save to keyboard</li>
+            <li>Right click on a key = Capture key</li>
+            <li>Hold Shift while clicking on a key = Remap on all keymaps</li>
+            <li>Hold Alt while clicking on a key = Remap on all layers</li>
+        </ul>
+    </div>
+</div>
--- a/packages/uhk-web/src/app/components/agent/help-page/help-page.component.scss
+++ b/packages/uhk-web/src/app/components/agent/help-page/help-page.component.scss
@@ -0,0 +1,5 @@
+:host {
+    width: 100%;
+    height: 100%;
+    display: block;
+}
--- a/packages/uhk-web/src/app/components/agent/help-page/help-page.component.ts
+++ b/packages/uhk-web/src/app/components/agent/help-page/help-page.component.ts
@@ -0,0 +1,13 @@
+import { ChangeDetectionStrategy, Component } from '@angular/core';
+
+@Component({
+    selector: 'help-page',
+    changeDetection: ChangeDetectionStrategy.OnPush,
+    templateUrl: './help-page.component.html',
+    styleUrls: ['./help-page.component.scss'],
+    host: {
+        'class': 'container-fluid'
+    }
+})
+export class HelpPageComponent {
+}
--- a/packages/uhk-web/src/app/components/auto-grow-input/auto-grow-input.component.html
+++ b/packages/uhk-web/src/app/components/auto-grow-input/auto-grow-input.component.html
@@ -0,0 +1,10 @@
+<input #inputControl
+       cancelable
+       [class]="css"
+       type="text"
+       [disabled]="disabled"
+       [(ngModel)]="model"
+       (blur)="blur()"
+       (focus)="focus()"
+       (keyup.enter)="keyEnter($event)"
+       (keyup)="calculateTextWidth($event.target.value)">
--- a/packages/uhk-web/src/app/components/auto-grow-input/auto-grow-input.component.ts
+++ b/packages/uhk-web/src/app/components/auto-grow-input/auto-grow-input.component.ts
@@ -0,0 +1,118 @@
+import {
+    ChangeDetectionStrategy,
+    ChangeDetectorRef,
+    Component,
+    ElementRef,
+    forwardRef, HostListener,
+    Input,
+    Renderer2,
+    ViewChild
+} from '@angular/core';
+import { ControlValueAccessor, NG_VALUE_ACCESSOR } from '@angular/forms';
+import * as util from '../../util';
+
+const noop = (_: any) => {
+};
+
+@Component({
+    selector: 'auto-grow-input',
+    templateUrl: './auto-grow-input.component.html',
+    changeDetection: ChangeDetectionStrategy.OnPush,
+    providers: [
+        {
+            provide: NG_VALUE_ACCESSOR,
+            useExisting: forwardRef(() => AutoGrowInputComponent),
+            multi: true
+        }
+    ]
+})
+export class AutoGrowInputComponent implements ControlValueAccessor {
+    @Input() maxParentWidthPercent = 1;
+    @Input() css: string;
+
+    @ViewChild('inputControl') inputControl: ElementRef;
+
+    disabled: boolean;
+
+    get model(): string {
+        return this._model;
+    }
+
+    set model(value: string) {
+        if (this._model === value) {
+            return;
+        }
+
+        this._model = value;
+    }
+
+    private _model: string;
+    private _originalModel: string;
+    private _onChanged = noop;
+    private _onTouched = noop;
+
+    constructor(private _cdRef: ChangeDetectorRef,
+                private _renderer: Renderer2) {
+    }
+
+    registerOnChange(fn: any): void {
+        this._onChanged = fn;
+    }
+
+    registerOnTouched(fn: any): void {
+        this._onTouched = fn;
+    }
+
+    setDisabledState(isDisabled: boolean): void {
+        if (this.disabled === isDisabled) {
+            return;
+        }
+
+        this.disabled = isDisabled;
+        this._cdRef.markForCheck();
+    }
+
+    @HostListener('window:resize')
+    windowResize(): void {
+        this.calculateTextWidth(this._model);
+    }
+
+    writeValue(obj: any): void {
+        console.log('write', new Date());
+        if (this.model === obj) {
+            return;
+        }
+
+        this._model = obj;
+        this._originalModel = obj;
+        this.calculateTextWidth(this._model);
+        this._cdRef.markForCheck();
+    }
+
+    focus(): void {
+        this._onTouched(this);
+    }
+
+    blur(): void {
+        if (!util.isValidName(this._model) || this._model.trim() === this._originalModel) {
+            this._model = this._originalModel;
+            this.calculateTextWidth(this._model);
+            this._cdRef.markForCheck();
+            return;
+        }
+
+        this._originalModel = this._model;
+        this._onChanged(this._model);
+    }
+
+    keyEnter(event): void {
+        event.target.blur();
+    }
+
+    calculateTextWidth(text: string): void {
+        const htmlInput = this.inputControl.nativeElement as HTMLInputElement;
+        const maxWidth = htmlInput.parentElement.parentElement.offsetWidth * this.maxParentWidthPercent;
+        const textWidth = util.getContentWidth(window.getComputedStyle(htmlInput), text);
+        this._renderer.setStyle(htmlInput, 'width', Math.min(maxWidth, textWidth) + 'px');
+    }
+}
--- a/packages/uhk-web/src/app/components/auto-grow-input/index.ts
+++ b/packages/uhk-web/src/app/components/auto-grow-input/index.ts
@@ -0,0 +1 @@
+export * from './auto-grow-input.component';
--- a/packages/uhk-web/src/app/components/device/configuration/device-configuration.component.html
+++ b/packages/uhk-web/src/app/components/device/configuration/device-configuration.component.html
@@ -9,16 +9,14 @@

 <ul class="list-unstyled btn-list">
    <li>
-        Download device configuration in
-        <span role="button" class="btn-link" (click)="saveConfigurationInJSONFormat()">JSON</span> or
-        <span role="button" class="btn-link" (click)="saveConfigurationInBINFormat()">binary</span> format.
+        <button class="btn btn-primary"
+                (click)="exportUserConfiguration($event)">Export device configuration
+        </button>
    </li>
    <li>
-        <label class="btn btn-default btn-file">
-            Upload device configuration
-            <input type="file"
-                   (change)="changeFile($event)">
-        </label>
+        <file-upload (fileChanged)="changeFile($event)"
+                     label="Import device configuration">
+        </file-upload>
    </li>
    <li>
        <button class="btn btn-danger"
--- a/packages/uhk-web/src/app/components/device/configuration/device-configuration.component.ts
+++ b/packages/uhk-web/src/app/components/device/configuration/device-configuration.component.ts
@@ -8,6 +8,7 @@ import {
    SaveUserConfigInBinaryFileAction,
    SaveUserConfigInJsonFileAction
 } from '../../../store/actions/user-config';
+import { UploadFileData } from '../../../models/upload-file-data';

@Component({
    selector: 'device-settings',
@@ -34,16 +35,15 @@ export class DeviceConfigurationComponent {
        this.store.dispatch(new SaveUserConfigInBinaryFileAction());
    }

-    changeFile(event): void {
-        const files = event.srcElement.files;
-        const fileReader = new FileReader();
-        fileReader.onloadend = function () {
-            const arrayBuffer = new Uint8Array(fileReader.result);
-            this.store.dispatch(new LoadUserConfigurationFromFileAction({
-                filename: event.srcElement.value,
-                data: Array.from(arrayBuffer)
-            }));
-        }.bind(this);
-        fileReader.readAsArrayBuffer(files[0]);
+    exportUserConfiguration(event: MouseEvent) {
+        if (event.shiftKey) {
+            this.saveConfigurationInBINFormat();
+        } else {
+            this.saveConfigurationInJSONFormat();
+        }
+    }
+
+    changeFile(data: UploadFileData): void {
+        this.store.dispatch(new LoadUserConfigurationFromFileAction(data));
    }
 }
--- a/packages/uhk-web/src/app/components/device/device.routes.ts
+++ b/packages/uhk-web/src/app/components/device/device.routes.ts
@@ -4,6 +4,8 @@ import { DeviceConfigurationComponent } from './configuration/device-configurati
 import { DeviceFirmwareComponent } from './firmware/device-firmware.component';
 import { MouseSpeedComponent } from './mouse-speed/mouse-speed.component';
 import { LEDBrightnessComponent } from './led-brightness/led-brightness.component';
+import { RestoreConfigurationComponent } from './restore-configuration/restore-configuration.component';
+import { RecoveryModeComponent } from './recovery-mode/recovery-mode.component';

 export const deviceRoutes: Routes = [
    {
@@ -29,6 +31,14 @@ export const deviceRoutes: Routes = [
            {
                path: 'firmware',
                component: DeviceFirmwareComponent
+            },
+            {
+                path: 'restore-user-configuration',
+                component: RestoreConfigurationComponent
+            },
+            {
+                path: 'recovery-mode',
+                component: RecoveryModeComponent
            }
        ]
    }
--- a/packages/uhk-web/src/app/components/device/firmware/device-firmware.component.html
+++ b/packages/uhk-web/src/app/components/device/firmware/device-firmware.component.html
@@ -6,35 +6,46 @@
                <i class="fa fa-sliders"></i>
                <span>Firmware</span>
            </h1>
-            <p>
-                Flash firmware {{ (getAgentVersionInfo$ | async).firmwareVersion }} (bundled with Agent)
-                <button class="btn btn-primary"
-                        [disabled]="flashFirmwareButtonDisbabled$ | async"
-                        (click)="onUpdateFirmware()">Flash firmware
-                </button>
-            </p>

            <p>
-                Flash firmware file <input id="firmware-file-select"
-                                           type="file"
-                                           [disabled]="flashFirmwareButtonDisbabled$ | async"
-                                           (change)="changeFile($event)">
+                Firmware {{ hardwareModules.leftModuleInfo.firmwareVersion }} is running on the left keyboard half.<br>
+                Firmware {{ hardwareModules.rightModuleInfo.firmwareVersion }} is running on the right keyboard half.
+            </p>
+
+            <p *ngIf="runningOnNotSupportedWindows$ | async">Firmware update doesn't work on Windows 7, Windows Vista,
+                and Windows XP. Use Windows 10, Windows 8, Linux, or OSX instead.</p>
+
+            <p *ngIf="firmwareUpgradeAllowed$ | async">
                <button class="btn btn-primary"
                        [disabled]="flashFirmwareButtonDisbabled$ | async"
-                        (click)="onUpdateFirmwareWithFile()">Flash firmware
+                        (click)="onUpdateFirmware()">
+                    Flash firmware {{ (getAgentVersionInfo$ | async).firmwareVersion }} (bundled with Agent)
                </button>
+                <file-upload [disabled]="flashFirmwareButtonDisbabled$ | async"
+                             (fileChanged)="changeFile($event)"
+                             accept=".tar.bz2"
+                             label="Choose firmware file and flash it"></file-upload>
            </p>
+
+            <div *ngIf="firmwareUpgradeFailed$ | async"
+                 class="alert alert-danger"
+                 role="alert">
+                <p>Firmware update failed. Disconnect every USB device from your computer (including USB hubs, KVM switches, USB dongles, and everything else), then connect only your UHK and retry.</p>
+
+                <p>If you've tried the above and the update still keeps failing, please <a class="link-github" (click)="openFirmwareGitHubIssuePage($event)">create a GitHub issue</a>, and attach the update log.</p>
+            </div>
+
+            <div *ngIf="firmwareUpgradeSuccess$ | async"
+                 class="alert alert-success"
+                 role="alert">
+                <p>Firmware update succeeded.</p>
+            </div>
        </div>

-        <div class="flex-grow" #scrollMe>
+        <div class="flex-grow" *ngIf="firmwareUpgradeAllowed$ | async">
            <xterm [logs]="xtermLog$ | async"></xterm>
        </div>
-        <div class="footer">
-            <button type="button"
-                    class="btn btn-primary ok-button"
-                    [disabled]="firmwareOkButtonDisabled$ | async"
-                    (click)="onOkButtonClick()">OK
-            </button>
+        <div class="flex-footer">
        </div>
    </div>
 </div>
--- a/packages/uhk-web/src/app/components/device/firmware/device-firmware.component.scss
+++ b/packages/uhk-web/src/app/components/device/firmware/device-firmware.component.scss
@@ -6,24 +6,6 @@
    width: 100%;
 }

-.flex-container {
-    height: 100%;
-    max-height: 100%;
-    display: flex;
-    flex-direction: column;
-}
-
-.flex-grow {
-    background-color: black;
-    overflow: auto;
-    flex: 1;
-}
-
-.footer {
-    margin-top: 0.5em;
-    margin-bottom: 0.5em;
-}
-
-.ok-button {
-    min-width: 100px;
+.link-github {
+    cursor: pointer;
 }
--- a/packages/uhk-web/src/app/components/device/firmware/device-firmware.component.ts
+++ b/packages/uhk-web/src/app/components/device/firmware/device-firmware.component.ts
@@ -1,12 +1,24 @@
-import { Component, ElementRef, OnDestroy, ViewChild } from '@angular/core';
+import { Component, OnDestroy } from '@angular/core';
 import { Store } from '@ngrx/store';
 import { Observable } from 'rxjs/Observable';
 import { Subscription } from 'rxjs/Subscription';
-import { VersionInformation } from 'uhk-common';
+import { Constants, HardwareModules, VersionInformation } from 'uhk-common';

-import { AppState, firmwareOkButtonDisabled, flashFirmwareButtonDisbabled, getAgentVersionInfo, xtermLog } from '../../../store';
-import { UpdateFirmwareAction, UpdateFirmwareOkButtonAction, UpdateFirmwareWithAction } from '../../../store/actions/device';
+import { OpenUrlInNewWindowAction } from '../../../store/actions/app';
+import {
+    AppState,
+    firmwareUpgradeAllowed,
+    firmwareUpgradeFailed,
+    firmwareUpgradeSuccess,
+    flashFirmwareButtonDisbabled,
+    getAgentVersionInfo,
+    getHardwareModules,
+    runningOnNotSupportedWindows,
+    xtermLog
+} from '../../../store';
+import { UpdateFirmwareAction, UpdateFirmwareWithAction } from '../../../store/actions/device';
 import { XtermLog } from '../../../models/xterm-log';
+import { UploadFileData } from '../../../models/upload-file-data';

@Component({
    selector: 'device-firmware',
@@ -19,60 +31,41 @@ import { XtermLog } from '../../../models/xterm-log';
 export class DeviceFirmwareComponent implements OnDestroy {
    flashFirmwareButtonDisbabled$: Observable<boolean>;
    xtermLog$: Observable<Array<XtermLog>>;
-    xtermLogSubscription: Subscription;
    getAgentVersionInfo$: Observable<VersionInformation>;
-    firmwareOkButtonDisabled$: Observable<boolean>;
-
-    arrayBuffer: Uint8Array;
-    @ViewChild('scrollMe') divElement: ElementRef;
+    hardwareModulesSubscription: Subscription;
+    hardwareModules: HardwareModules;
+    runningOnNotSupportedWindows$: Observable<boolean>;
+    firmwareUpgradeAllowed$: Observable<boolean>;
+    firmwareUpgradeFailed$: Observable<boolean>;
+    firmwareUpgradeSuccess$: Observable<boolean>;

    constructor(private store: Store<AppState>) {
        this.flashFirmwareButtonDisbabled$ = store.select(flashFirmwareButtonDisbabled);
        this.xtermLog$ = store.select(xtermLog);
-        this.xtermLogSubscription = this.xtermLog$.subscribe(() => {
-            if (this.divElement && this.divElement.nativeElement) {
-                setTimeout(() => {
-                    this.divElement.nativeElement.scrollTop = this.divElement.nativeElement.scrollHeight;
-                });
-            }
-        });
        this.getAgentVersionInfo$ = store.select(getAgentVersionInfo);
-        this.firmwareOkButtonDisabled$ = store.select(firmwareOkButtonDisabled);
+        this.hardwareModulesSubscription = store.select(getHardwareModules).subscribe(data => {
+            this.hardwareModules = data;
+        });
+        this.runningOnNotSupportedWindows$ = store.select(runningOnNotSupportedWindows);
+        this.firmwareUpgradeAllowed$ = store.select(firmwareUpgradeAllowed);
+        this.firmwareUpgradeFailed$ = store.select(firmwareUpgradeFailed);
+        this.firmwareUpgradeSuccess$ = store.select(firmwareUpgradeSuccess);
    }

    ngOnDestroy(): void {
-        this.xtermLogSubscription.unsubscribe();
+        this.hardwareModulesSubscription.unsubscribe();
    }

    onUpdateFirmware(): void {
        this.store.dispatch(new UpdateFirmwareAction());
    }

-    onUpdateFirmwareWithFile(): void {
-        if (!this.arrayBuffer) {
-            return;
-        }
-
-        this.store.dispatch(new UpdateFirmwareWithAction(Array.prototype.slice.call(this.arrayBuffer)));
+    changeFile(data: UploadFileData): void {
+        this.store.dispatch(new UpdateFirmwareWithAction(data.data));
    }

-    onOkButtonClick(): void {
-        this.store.dispatch(new UpdateFirmwareOkButtonAction());
-    }
-
-    changeFile(event): void {
-        const files = event.srcElement.files;
-
-        if (files.length === 0) {
-            this.arrayBuffer = null;
-
-            return;
-        }
-
-        const fileReader = new FileReader();
-        fileReader.onloadend = function () {
-            this.arrayBuffer = new Uint8Array(fileReader.result);
-        }.bind(this);
-        fileReader.readAsArrayBuffer(files[0]);
+    openFirmwareGitHubIssuePage(event): void {
+        event.preventDefault();
+        this.store.dispatch(new OpenUrlInNewWindowAction(Constants.FIRMWARE_GITHUB_ISSUE_URL));
    }
 }
--- a/packages/uhk-web/src/app/components/device/index.ts
+++ b/packages/uhk-web/src/app/components/device/index.ts
@@ -2,4 +2,6 @@ export * from './configuration/device-configuration.component';
 export * from './firmware/device-firmware.component';
 export * from './mouse-speed/mouse-speed.component';
 export * from './led-brightness/led-brightness.component';
+export * from './restore-configuration/restore-configuration.component';
+export * from './recovery-mode/recovery-mode.component';
 export * from './device.routes';
--- a/packages/uhk-web/src/app/components/device/recovery-mode/recovery-mode.component.html
+++ b/packages/uhk-web/src/app/components/device/recovery-mode/recovery-mode.component.html
@@ -0,0 +1,26 @@
+<div class="full-height">
+    <div class="flex-container">
+        <div>
+
+            <h1>
+                <i class="fa fa-wrench"></i>
+                <span>Fix device</span>
+            </h1>
+            <p>
+                Your device seems to be broken. No worries, Agent can fix it.
+            </p>
+            <p>
+                <button class="btn btn-primary"
+                        type="button"
+                        [disabled]="flashFirmwareButtonDisbabled$ | async"
+                        (click)="onRecoveryDevice()">Fix device
+                </button>
+            </p>
+        </div>
+        <div class="flex-grow">
+            <xterm [logs]="xtermLog$ | async"></xterm>
+        </div>
+        <div class="flex-footer">
+        </div>
+    </div>
+</div>
--- a/packages/uhk-web/src/app/components/device/recovery-mode/recovery-mode.component.scss
+++ b/packages/uhk-web/src/app/components/device/recovery-mode/recovery-mode.component.scss
@@ -0,0 +1,10 @@
+:host {
+    overflow-y: auto;
+    display: block;
+    height: 100%;
+    width: 100%;
+
+    p {
+        margin: 1.5rem 0;
+    }
+}
--- a/packages/uhk-web/src/app/components/device/recovery-mode/recovery-mode.component.ts
+++ b/packages/uhk-web/src/app/components/device/recovery-mode/recovery-mode.component.ts
@@ -0,0 +1,34 @@
+import { ChangeDetectionStrategy, Component, OnInit } from '@angular/core';
+import { Store } from '@ngrx/store';
+import { Observable } from 'rxjs/Observable';
+
+import { XtermLog } from '../../../models/xterm-log';
+import { AppState, flashFirmwareButtonDisbabled, xtermLog } from '../../../store';
+import { RecoveryDeviceAction } from '../../../store/actions/device';
+
+@Component({
+    selector: 'device-recovery-mode',
+    changeDetection: ChangeDetectionStrategy.OnPush,
+    templateUrl: './recovery-mode.component.html',
+    styleUrls: ['./recovery-mode.component.scss'],
+    host: {
+        'class': 'container-fluid'
+    }
+})
+export class RecoveryModeComponent implements OnInit {
+    flashFirmwareButtonDisbabled$: Observable<boolean>;
+
+    xtermLog$: Observable<Array<XtermLog>>;
+
+    constructor(private store: Store<AppState>) {
+    }
+
+    ngOnInit(): void {
+        this.flashFirmwareButtonDisbabled$ = this.store.select(flashFirmwareButtonDisbabled);
+        this.xtermLog$ = this.store.select(xtermLog);
+    }
+
+    onRecoveryDevice(): void {
+        this.store.dispatch(new RecoveryDeviceAction());
+    }
+}
--- a/packages/uhk-web/src/app/components/device/restore-configuration/restore-configuration.component.html
+++ b/packages/uhk-web/src/app/components/device/restore-configuration/restore-configuration.component.html
@@ -0,0 +1,19 @@
+<h1>
+    <i class="fa fa-exclamation-circle"></i>
+    <span>Fix configuration</span>
+</h1>
+
+<p>
+    Your on-board device configuration is invalid.
+</p>
+<button class="btn btn-primary"
+        *ngIf="state.hasBackupUserConfiguration"
+        [disabled]="state.restoringUserConfiguration"
+        (click)="restoreUserConfiguration()"> Restore the last valid device configuration
+</button>
+
+<button class="btn btn-danger"
+        *ngIf="!state.hasBackupUserConfiguration"
+        [disabled]="state.restoringUserConfiguration"
+        (click)="resetUserConfiguration()">Reset device configuration
+</button>
--- a/packages/uhk-web/src/app/components/device/restore-configuration/restore-configuration.component.scss
+++ b/packages/uhk-web/src/app/components/device/restore-configuration/restore-configuration.component.scss
@@ -0,0 +1,10 @@
+:host {
+    overflow-y: auto;
+    display: block;
+    height: 100%;
+    width: 100%;
+
+    p {
+        margin: 1.5rem 0;
+    }
+}
--- a/packages/uhk-web/src/app/components/device/restore-configuration/restore-configuration.component.ts
+++ b/packages/uhk-web/src/app/components/device/restore-configuration/restore-configuration.component.ts
@@ -0,0 +1,48 @@
+import { ChangeDetectorRef, Component, OnDestroy, OnInit } from '@angular/core';
+import { Store } from '@ngrx/store';
+import { Subscription } from 'rxjs/Subscription';
+
+import { AppState, getBackupUserConfigurationState } from '../../../store';
+import { ResetUserConfigurationAction, RestoreUserConfigurationFromBackupAction } from '../../../store/actions/device';
+import { RestoreConfigurationState } from '../../../models/restore-configuration-state';
+
+@Component({
+    selector: 'restore-configuration',
+    templateUrl: './restore-configuration.component.html',
+    styleUrls: ['./restore-configuration.component.scss'],
+    host: {
+        'class': 'container-fluid'
+    }
+})
+export class RestoreConfigurationComponent implements OnInit, OnDestroy {
+    state: RestoreConfigurationState;
+
+    private stateSubscription: Subscription;
+
+    constructor(private store: Store<AppState>,
+                private cdRef: ChangeDetectorRef) {
+    }
+
+    ngOnDestroy(): void {
+        if (this.stateSubscription) {
+            this.stateSubscription.unsubscribe();
+        }
+    }
+
+    ngOnInit(): void {
+        this.stateSubscription = this.store
+            .select(getBackupUserConfigurationState)
+            .subscribe(data => {
+                this.state = data;
+                this.cdRef.markForCheck();
+            });
+    }
+
+    resetUserConfiguration() {
+        this.store.dispatch(new ResetUserConfigurationAction());
+    }
+
+    restoreUserConfiguration(): void {
+        this.store.dispatch(new RestoreUserConfigurationFromBackupAction());
+    }
+}
--- a/packages/uhk-web/src/app/components/file-upload/file-upload.component.html
+++ b/packages/uhk-web/src/app/components/file-upload/file-upload.component.html
@@ -0,0 +1,9 @@
+<label class="btn btn-primary btn-file"
+       [class.disabled]="disabled">
+    {{ label }}
+    <input #inputControl
+           type="file"
+           [accept]="accept"
+           [disabled]="disabled"
+           (change)="changeFile($event)">
+</label>
--- a/packages/uhk-web/src/app/components/file-upload/file-upload.component.ts
+++ b/packages/uhk-web/src/app/components/file-upload/file-upload.component.ts
@@ -0,0 +1,36 @@
+import { ChangeDetectionStrategy, Component, EventEmitter, Input, Output } from '@angular/core';
+
+import { UploadFileData } from '../../models/upload-file-data';
+
+@Component({
+    selector: 'file-upload',
+    templateUrl: './file-upload.component.html',
+    changeDetection: ChangeDetectionStrategy.OnPush
+})
+export class FileUploadComponent {
+    @Input() label = 'Select file';
+    @Input() disabled: boolean;
+    @Input() accept: string;
+
+    @Output() fileChanged = new EventEmitter<UploadFileData>();
+
+    changeFile(event): void {
+        const files = event.srcElement.files;
+
+        if (files.length === 0) {
+            return;
+        }
+
+        const fileReader = new FileReader();
+        fileReader.onloadend = function () {
+            const arrayBuffer = new Uint8Array(fileReader.result);
+            const target = event.target || event.srcElement || event.currentTarget;
+            target.value = null;
+            this.fileChanged.emit({
+                filename: event.srcElement.value,
+                data: Array.from(arrayBuffer)
+            });
+        }.bind(this);
+        fileReader.readAsArrayBuffer(files[0]);
+    }
+}
--- a/packages/uhk-web/src/app/components/file-upload/index.ts
+++ b/packages/uhk-web/src/app/components/file-upload/index.ts
@@ -0,0 +1 @@
+export * from './file-upload.component';
--- a/Show More
+++ b/Show More
@@ -1 +1 @@
 .9.4
 .11.2
				`@@ -0,0 +1 @@`
				`export * from './auto-grow-input.component';`