diff --git a/usb/set-led-values.js b/usb/set-led-values.js
new file mode 100755
index 00000000..9f4c2d0c
--- /dev/null
+++ b/usb/set-led-values.js
@@ -0,0 +1,36 @@
+#!/usr/bin/env node
+let uhk = require('./uhk');
+
+let programName = process.argv[1];
+
+if (process.argv.length !== 6) {
+    console.log(`Usage: ${programName} [display 0-255] [left keys 0-255] [unused 0-255] [right keys 0-255]`);
+    process.exit(1);
+}
+
+let pwmOffset = 0;
+let ledDriverAddresses = [uhk.leftLedDriverAddress, uhk.rightLedDriverAddress];
+let ledDriverAddress;
+const FRAME_REGISTER_PWM_FIRST = 0x24;
+
+uhk.sendUsbPacketsByCallback(() => {
+    if (pwmOffset === 0) {
+        ledDriverAddress = ledDriverAddresses.shift();
+    }
+    if (!ledDriverAddress) {
+        return;
+    }
+
+    let isMatrixA = pwmOffset % 16;
+    let argIndex = 2 + (ledDriverAddress == uhk.leftLedDriverAddress ? 0 : 2) + (isMatrixA ? 0 : 1);
+    let val = +process.argv[argIndex];
+    let buffer = new Buffer([uhk.usbCommands.writeLedDriver, ledDriverAddress,
+                             9, FRAME_REGISTER_PWM_FIRST+pwmOffset, val, val, val, val, val, val, val, val]);
+    pwmOffset += 8;
+
+    if (pwmOffset >= 144) {
+        pwmOffset = 0;
+    }
+
+    return buffer;
+});
diff --git a/usb/uhk.js b/usb/uhk.js
index 981305ea..742f019d 100755
--- a/usb/uhk.js
+++ b/usb/uhk.js
@@ -104,4 +104,6 @@ exports = module.exports = {
         applyConfig: 9,
         setLedPwm: 10
     },
+    leftLedDriverAddress: 0b1110100,
+    rightLedDriverAddress: 0b1110111
 }