diff --git a/usb/blink-test-led.js b/usb/blink-test-led.js
index bef0fcf6..13bf8868 100755
--- a/usb/blink-test-led.js
+++ b/usb/blink-test-led.js
@@ -2,10 +2,11 @@
 'use strict';
 
 var usb = require('usb');
+var util = require('./util');
 
 var vid = 0x16d3;
 var pid = 0x05ea;
-var test_led_command_id = 1;
+var test_led_command_id = 2;
 
 var device = usb.findByIds(vid, pid);
 device.open();
@@ -22,13 +23,19 @@ var endpointOut = usbInterface.endpoints[1];
 var state = 1;
 
 setInterval(function() {
-    console.log('Sending ', state);
     state = state ? 0 : 1
-    console.log(state)
+    console.log('Sending ', state);
     endpointOut.transfer(new Buffer([test_led_command_id, state]), function(err) {
         if (err) {
             console.error("USB error: %s", err);
             process.exit(1);
         }
+        endpointIn.transfer(64, function(err2, receivedBuffer) {
+            if (err2) {
+                console.error("USB error: %s", err2);
+                process.exit(2);
+            }
+            console.log('Received', util.bufferToString(receivedBuffer));
+        })
     });
 }, 500)
diff --git a/usb/pulse-leds.js b/usb/pulse-leds.js
new file mode 100755
index 00000000..737fd1a2
--- /dev/null
+++ b/usb/pulse-leds.js
@@ -0,0 +1,214 @@
+#!/usr/bin/env node
+'use strict';
+
+var usb = require('usb');
+var util = require('./util');
+
+var vid = 0x16d3;
+var pid = 0x05ea;
+var ledMatrixSize = 144;
+var ledCountToUpdatePerCommand = ledMatrixSize / 3;
+var writeLedDriverCommandId = 3;
+var leftLedDriverAddress = 0b1110100;
+var rightLedDriverAddress = 0b1110111;
+
+var device = usb.findByIds(vid, pid);
+device.open();
+
+var usbInterface = device.interface(0);
+if (usbInterface.isKernelDriverActive()) {
+    usbInterface.detachKernelDriver();
+}
+usbInterface.claim();
+
+var endpointIn = usbInterface.endpoints[0];
+var endpointOut = usbInterface.endpoints[1];
+
+var state = 1;
+
+var ledsLeft = new Buffer(ledMatrixSize);
+var ledsRight = new Buffer(ledMatrixSize);
+ledsLeft.fill(0xff)
+ledsRight.fill(0xff)
+
+var ledIndex = 0;
+var matrixId = 0;
+
+var initLedCommands = [
+    [ // only enable the LEDs that are actually in the matrix
+        writeLedDriverCommandId,
+        leftLedDriverAddress,
+        19,
+        0,
+        0b00000001, 0b00111111,
+        0, 0b00111111,
+        0, 0b00111111,
+        0, 0b00011111,
+        0, 0b00011111,
+        0, 0b00011111,
+        0, 0b00011111,
+        0, 0b00011111,
+        0, 0b00011111,
+    ],
+    [ // only enable the LEDs that are actually in the matrix
+        writeLedDriverCommandId,
+        rightLedDriverAddress,
+        19,
+        0,
+        0b00000001, 0,
+        0, 0,
+        0, 0,
+        0, 0,
+        0, 0,
+        0, 0,
+        0, 0,
+        0, 0,
+        0, 0,
+    ],
+    [writeLedDriverCommandId, leftLedDriverAddress, 2, 0xfd, 0x0b], // switch to function page
+    [writeLedDriverCommandId, leftLedDriverAddress, 2, 0xc2, 0xff], // enable the ghost image prevention bit
+    [writeLedDriverCommandId, leftLedDriverAddress, 2, 0xfd, 0x00], // switch to page 0
+]
+
+var ledCommandId = 0;
+
+function initLeds() {
+    var ledCommand = initLedCommands[ledCommandId++];
+    console.log('initLeds', ledCommand);
+    var buffer = new Buffer(ledCommand);
+
+    endpointOut.transfer(buffer, function(err) {
+        if (err) {
+            console.error("USB error: %s", err);
+            process.exit(1);
+        }
+        if (ledCommandId < initLedCommands.length) {
+            initLeds();
+        } else {
+            updateLeds();
+        }
+    });
+}
+
+function updateLeds() {
+//    console.log('update')
+    var buffer = Buffer.concat([
+        new Buffer([
+            writeLedDriverCommandId,
+            matrixId ? rightLedDriverAddress : leftLedDriverAddress,
+            ledCountToUpdatePerCommand,
+            0x24 + ledIndex
+        ]),
+        (matrixId ? ledsRight : ledsLeft).slice(ledIndex, ledIndex + ledCountToUpdatePerCommand)
+    ]);
+    console.log('iter: '+letterIdx+' out:', util.bufferToString(buffer))
+    endpointOut.transfer(buffer, function(err) {
+        if (err) {
+            console.error("USB error: %s", err);
+            process.exit(1);
+        }
+//        console.log('update success')
+        endpointIn.transfer(64, function(err2, receivedBuffer) {
+            if (err2) {
+                console.error("USB error: %s", err2);
+                process.exit(2);
+            }
+//            console.log('Received', util.bufferToString(receivedBuffer));
+
+            ledIndex += ledCountToUpdatePerCommand;
+            if (ledIndex >= ledMatrixSize) {
+                ledIndex = 0;
+                matrixId = matrixId ? 0 : 1;
+            }
+
+            updateLeds();
+        })
+    });
+}
+
+initLeds();
+
+var letterIdx = 0;
+
+var lettersLeds = {
+    0: [1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1],
+    1: [0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0],
+    2: [1, 0, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 1],
+    3: [1, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 1, 1],
+    4: [0, 1, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 1, 0],
+    5: [1, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 1],
+    6: [1, 1, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 1, 1],
+    7: [1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0],
+    8: [1, 1, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 1, 1],
+    9: [1, 1, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 1, 1],
+    A: [1, 1, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 1, 0],
+    B: [1, 0, 0, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 1],
+    C: [1, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1],
+    D: [1, 0, 0, 1, 0, 1, 0, 0, 0, 0, 1, 0, 1, 1],
+    E: [1, 1, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 1],
+    F: [1, 1, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0],
+    G: [1, 1, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 1, 1],
+    H: [0, 1, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 1, 0],
+    I: [0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0],
+    J: [0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 1],
+    K: [0, 1, 0, 0, 1, 0, 1, 0, 1, 0, 0, 1, 0, 0],
+    L: [0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1],
+    M: [0, 1, 1, 0, 1, 1, 0, 0, 1, 0, 0, 0, 1, 0],
+    N: [0, 1, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 1, 0],
+    O: [1, 1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 1],
+    P: [1, 1, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0],
+    Q: [1, 1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 1, 1, 1],
+    R: [1, 1, 0, 0, 0, 1, 1, 1, 1, 0, 0, 1, 0, 0],
+    S: [1, 1, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 1, 1],
+    T: [1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0],
+    U: [0, 1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 1],
+    V: [0, 1, 0, 0, 1, 0, 0, 0, 1, 1, 0, 0, 0, 0],
+    W: [0, 1, 0, 0, 0, 1, 0, 0, 1, 1, 0, 1, 1, 0],
+    X: [0, 0, 1, 0, 1, 0, 0, 0, 0, 1, 0, 1, 0, 0],
+    Y: [0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0],
+    Z: [1, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 1],
+}
+
+var iconLedsToLedMatrix = [0x08, 0x09, 0x0a];
+var layerLedsToLedMatrix = [0x0d, 0x1d, 0x2d];
+
+var characterLedsToLedMatrix = [
+    [0x0b, 0x1b, 0x29, 0x2a, 0x2b, 0x0c, 0x1c, 0x28, 0x1a, 0x2c, 0x38, 0x39, 0x18, 0x19],
+    [0x3a, 0x4a, 0x58, 0x59, 0x5a, 0x3b, 0x4b, 0x4c, 0x49, 0x5b, 0x5c, 0x68, 0x3c, 0x48],
+    [0x69, 0x79, 0x7c, 0x88, 0x89, 0x6a, 0x7a, 0x7b, 0x78, 0x8a, 0x8b, 0x8c, 0x6b, 0x6c]
+]
+
+function setIcons(iconStates) {
+    for (var i=0; i<iconStates.length; i++) {
+        ledsLeft[iconLedsToLedMatrix[i]] = iconStates[i] ? 0xff : 0;
+    }
+}
+
+function setLayerLed(layerIdx) {
+    for (var i=0; i<layerLedsToLedMatrix.length; i++) {
+        ledsLeft[layerLedsToLedMatrix[i]] = i == layerIdx ? 0xff : 0;
+    }
+}
+
+function setLetter(letterLeds, position) {
+    for (var i=0; i<14; i++) {
+        ledsLeft[characterLedsToLedMatrix[position][i]] = letterLeds[i] ? 0xff : 0;
+    }
+}
+
+var digitsAndLetters = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ';
+
+
+var letterIdx = 0;
+var layerLedIdx = 0;
+setInterval(function() {
+setIcons([1, 1, 1]);
+    for (var i=0; i<3; i++) {
+        setLetter(lettersLeds[digitsAndLetters[(letterIdx+i) % digitsAndLetters.length]], i);
+    }
+    setLayerLed(layerLedIdx);
+    if (++letterIdx >= digitsAndLetters.length) {
+        letterIdx = 0;
+    }
+    layerLedIdx = ++layerLedIdx % layerLedsToLedMatrix.length;
+}, 200);
diff --git a/usb/read-eeprom.js b/usb/read-eeprom.js
new file mode 100755
index 00000000..48d48b0f
--- /dev/null
+++ b/usb/read-eeprom.js
@@ -0,0 +1,37 @@
+#!/usr/bin/env node
+'use strict';
+
+var usb = require('usb');
+var util = require('./util');
+
+var vid = 0x16d3;
+var pid = 0x05ea;
+var readEepromCommandId = 6;
+
+var device = usb.findByIds(vid, pid);
+device.open();
+
+var usbInterface = device.interface(0);
+if (usbInterface.isKernelDriverActive()) {
+    usbInterface.detachKernelDriver();
+}
+usbInterface.claim();
+
+var endpointIn = usbInterface.endpoints[0];
+var endpointOut = usbInterface.endpoints[1];
+
+var payload = new Buffer([readEepromCommandId, 63, 0x00, 0x00]);
+console.log('Sending ', util.bufferToString(payload));
+endpointOut.transfer(payload, function(err) {
+    if (err) {
+        console.error("USB error: %s", err);
+        process.exit(1);
+    }
+    endpointIn.transfer(64, function(err2, receivedBuffer) {
+        if (err2) {
+            console.error("USB error: %s", err2);
+            process.exit(2);
+        }
+        console.log('Received', util.bufferToString(receivedBuffer));
+    })
+});
diff --git a/usb/read-iso-jumper.js b/usb/read-iso-jumper.js
new file mode 100755
index 00000000..91ae11ba
--- /dev/null
+++ b/usb/read-iso-jumper.js
@@ -0,0 +1,44 @@
+#!/usr/bin/env node
+'use strict';
+
+var usb = require('usb');
+var util = require('./util');
+
+var vid = 0x16d3;
+var pid = 0x05ea;
+var readIsoJumperCommandId = 9;
+
+var device = usb.findByIds(vid, pid);
+device.open();
+
+var usbInterface = device.interface(0);
+if (usbInterface.isKernelDriverActive()) {
+    usbInterface.detachKernelDriver();
+}
+usbInterface.claim();
+
+var endpointIn = usbInterface.endpoints[0];
+var endpointOut = usbInterface.endpoints[1];
+
+function readLedJumper() {
+    var payload = new Buffer([readIsoJumperCommandId]);
+    console.log('Sending ', util.bufferToString(payload));
+    endpointOut.transfer(payload, function(err) {
+        if (err) {
+            console.error("USB error: %s", err);
+            process.exit(1);
+        }
+        endpointIn.transfer(64, function(err2, receivedBuffer) {
+            if (err2) {
+                console.error("USB error: %s", err2);
+                process.exit(2);
+            }
+            console.log('Received', util.bufferToString(receivedBuffer));
+            var isIso = receivedBuffer[1] === 0;
+            console.log('ISO jumper is ' + (isIso ? 'closed' : 'open') + ' so the detected layout is ' + (isIso ? 'ISO' : 'ANSI'));
+            console.log('Restart the UHK after switching the switch for the change to take effect!');
+        })
+    });
+}
+
+readLedJumper();
diff --git a/usb/read-led-jumper.js b/usb/read-led-jumper.js
new file mode 100755
index 00000000..fd442a7d
--- /dev/null
+++ b/usb/read-led-jumper.js
@@ -0,0 +1,44 @@
+#!/usr/bin/env node
+'use strict';
+
+var usb = require('usb');
+var util = require('./util');
+
+var vid = 0x16d3;
+var pid = 0x05ea;
+var readLedJumperCommandId = 8;
+
+var device = usb.findByIds(vid, pid);
+device.open();
+
+var usbInterface = device.interface(0);
+if (usbInterface.isKernelDriverActive()) {
+    usbInterface.detachKernelDriver();
+}
+usbInterface.claim();
+
+var endpointIn = usbInterface.endpoints[0];
+var endpointOut = usbInterface.endpoints[1];
+
+function readLedJumper() {
+    var payload = new Buffer([readLedJumperCommandId]);
+    console.log('Sending ', util.bufferToString(payload));
+    endpointOut.transfer(payload, function(err) {
+        if (err) {
+            console.error("USB error: %s", err);
+            process.exit(1);
+        }
+        endpointIn.transfer(64, function(err2, receivedBuffer) {
+            if (err2) {
+                console.error("USB error: %s", err2);
+                process.exit(2);
+            }
+            console.log('Received', util.bufferToString(receivedBuffer));
+            var isLedJumperOn = receivedBuffer[1] === 0;
+            console.log('LED jumper is ' + (isLedJumperOn ? 'on' : 'off'))
+            setTimeout(readLedJumper, 500)
+        })
+    });
+}
+
+readLedJumper();
diff --git a/usb/read-merge-sensor.js b/usb/read-merge-sensor.js
new file mode 100755
index 00000000..56ffe182
--- /dev/null
+++ b/usb/read-merge-sensor.js
@@ -0,0 +1,46 @@
+#!/usr/bin/env node
+'use strict';
+
+var usb = require('usb');
+var util = require('./util');
+
+var vid = 0x16d3;
+var pid = 0x05ea;
+var readMergeSensorCommandId = 7;
+
+var device = usb.findByIds(vid, pid);
+device.open();
+
+var usbInterface = device.interface(0);
+if (usbInterface.isKernelDriverActive()) {
+    usbInterface.detachKernelDriver();
+}
+usbInterface.claim();
+
+var endpointIn = usbInterface.endpoints[0];
+var endpointOut = usbInterface.endpoints[1];
+var arg = process.argv[2] || '';
+
+
+function readMergeSensor() {
+    var payload = new Buffer([readMergeSensorCommandId]);
+    console.log('Sending ', util.bufferToString(payload));
+    endpointOut.transfer(payload, function(err) {
+        if (err) {
+            console.error("USB error: %s", err);
+            process.exit(1);
+        }
+        endpointIn.transfer(64, function(err2, receivedBuffer) {
+            if (err2) {
+                console.error("USB error: %s", err2);
+                process.exit(2);
+            }
+            console.log('Received', util.bufferToString(receivedBuffer));
+            setTimeout(readMergeSensor, 500)
+            var areHalvesMerged = receivedBuffer[1] === 1;
+            console.log('The keyboards halves are ' + (areHalvesMerged ? 'merged' : 'split'))
+        })
+    });
+}
+
+readMergeSensor();
diff --git a/usb/util.js b/usb/util.js
new file mode 100755
index 00000000..b9da78e0
--- /dev/null
+++ b/usb/util.js
@@ -0,0 +1,13 @@
+exports = module.exports = {
+    bufferToString: function(buffer) {
+        var str = '';
+        for (var i = 0; i < buffer.length; i++) {
+            var hex = buffer[i].toString(16) + ' ';
+            if (hex.length <= 2) {
+                hex = '0' + hex;
+            }
+            str += hex;
+        };
+        return str;
+    }
+}
diff --git a/usb/write-eeprom.js b/usb/write-eeprom.js
new file mode 100755
index 00000000..8db73e8e
--- /dev/null
+++ b/usb/write-eeprom.js
@@ -0,0 +1,43 @@
+#!/usr/bin/env node
+'use strict';
+
+var usb = require('usb');
+var util = require('./util');
+
+var vid = 0x16d3;
+var pid = 0x05ea;
+var writeEepromCommandId = 5;
+
+var device = usb.findByIds(vid, pid);
+device.open();
+
+var usbInterface = device.interface(0);
+if (usbInterface.isKernelDriverActive()) {
+    usbInterface.detachKernelDriver();
+}
+usbInterface.claim();
+
+var endpointIn = usbInterface.endpoints[0];
+var endpointOut = usbInterface.endpoints[1];
+var arg = process.argv[2] || '';
+
+if (arg.length === 0) {
+    console.log('Gotta specify a string to be written to the EEPROM as the argument of this script');
+    process.exit(1);
+}
+
+var payload = Buffer.concat([new Buffer([writeEepromCommandId, arg.length+2, 0x00, 0x00]), new Buffer(arg, 'utf8')]);
+console.log('Sending ', util.bufferToString(payload));
+endpointOut.transfer(payload, function(err) {
+    if (err) {
+        console.error("USB error: %s", err);
+        process.exit(1);
+    }
+    endpointIn.transfer(64, function(err2, receivedBuffer) {
+        if (err2) {
+            console.error("USB error: %s", err2);
+            process.exit(2);
+        }
+        console.log('Received', util.bufferToString(receivedBuffer));
+    })
+});