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DarkNikGr/rc-car-remote.html

Last active April 1, 2024 12:57
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Shell Rc Car remote
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rc-car-remote.html
<!DOCTYPE html>
<html>
<head>
<title>Bluetooth RC Remote</title>
<script src="https://cdnjs.cloudflare.com/ajax/libs/crypto-js/4.2.0/crypto-js.min.js" integrity="sha512-a+SUDuwNzXDvz4XrIcXHuCf089/iJAoN4lmrXJg18XnduKK6YlDHNRalv4yd1N40OKI80tFidF+rqTFKGPoWFQ==" crossorigin="anonymous" referrerpolicy="no-referrer"></script>
</head>
<body>
<button id="connect_device" onclick="connectButton()">Connect to device</button>
<div>
<input type="checkbox" id="turbo_mode"> Turbo
</div>
<div>
<input type="checkbox" id="light_mode"> Lights
</div>
<div>
Battery: <span id="battery_status">0</span>%
</div>
<script>
var bluetooth = null;
const CONTROL_SERVICE_UUID = '0000fff0-0000-1000-8000-00805f9b34fb'
const BATTERY_SERVICE_UUID = '0000fff0-0000-1000-8000-00805f9b34fb'
const CONTROL_CHARACTERISTICS_UUID = 'd44bc439-abfd-45a2-b575-925416129600'
const BATTERY_CHARACTERISTICS_UUID = 'd44bc439-abfd-45a2-b575-925416129601'
const DECRYPT_KEY = "34522a5b7a6e492c08090a9d8d2a23f8";
let bt_up = false;
let bt_down = false;
let bt_left = false;
let bt_right = false;
let lastIdleStateSend = false;
const turboEl = document.getElementById('turbo_mode')
const lightEl = document.getElementById('light_mode')
const batteryEl = document.getElementById('battery_status')
function connectButton()
{
requestDevice();
}
async function requestDevice() {
console.log('Requesting any Bluetooth Device...');
var device = await navigator.bluetooth.requestDevice({
filters: [
{ namePrefix: "QCAR-" },
],
// acceptAllDevices: true,
optionalServices: [
CONTROL_SERVICE_UUID,
BATTERY_SERVICE_UUID,
CONTROL_CHARACTERISTICS_UUID,
BATTERY_CHARACTERISTICS_UUID,
]
});
await connectDevice(device);
console.log("Device connected");
}
async function onDisconnected() {
console.log('> Bluetooth Device disconnected');
bluetooth = null;
}
function decryptAES(cipherText) {
const encryptedHex = CryptoJS.enc.Hex.parse(cipherText.tohex());
const keyHex = CryptoJS.enc.Hex.parse(DECRYPT_KEY);
const decrypted = CryptoJS.AES.decrypt({ ciphertext: encryptedHex }, keyHex, {
mode: CryptoJS.mode.ECB,
padding: CryptoJS.pad.NoPadding
});
return decrypted.toString().toUint8Array();
}
function encryptAES(cipherText) {
const valueHex = CryptoJS.enc.Hex.parse(cipherText.tohex());
const keyHex = CryptoJS.enc.Hex.parse(DECRYPT_KEY);
const encrypted = CryptoJS.AES.encrypt(valueHex, keyHex, {
mode: CryptoJS.mode.ECB,
padding: CryptoJS.pad.NoPadding
});
return encrypted.ciphertext.toString().toUint8Array();
}
async function sendMessage() {
const cmd = calculateMove();
const encryptCmd = encryptAES(cmd);
var service = await bluetooth.getPrimaryService(CONTROL_SERVICE_UUID);
var characteristic = await service.getCharacteristic(CONTROL_CHARACTERISTICS_UUID);
await characteristic.writeValue(encryptCmd);
}
async function connectDevice(device) {
device.addEventListener('gattserverdisconnected', onDisconnected);
bluetooth = await device.gatt.connect();
return new Promise(async (resolve) => {
const BatteryService = await bluetooth.getPrimaryService(BATTERY_SERVICE_UUID);
const BatteryCharacteristic = await BatteryService.getCharacteristic(BATTERY_CHARACTERISTICS_UUID);
await BatteryCharacteristic.startNotifications();
BatteryCharacteristic.addEventListener('characteristicvaluechanged', handleNotificationsBattary);
});
}
function isIdle() {
return !(bt_up || bt_down || bt_right || bt_left);
}
ArrayBuffer.prototype.tohex = function () {
return [...new Uint8Array(this)]
.map(x => x.toString(16).padStart(2, '0'))
.join('');
}
Uint8Array.prototype.tohex = function () {
return [...new Uint8Array(this)]
.map(x => x.toString(16).padStart(2, '0'))
.join('');
}
String.prototype.toUint8Array = function () {
return Uint8Array.from(this.match(/.{1,2}/g).map((byte) => parseInt(byte, 16)));
}
function calculateMove() {
const turbo = turboEl.checked || false;
const light = lightEl.checked || false;
const up = bt_up;
const down = bt_down;
const left = bt_left;
const right = bt_right;
const cmd = new Uint8Array(16);
cmd[1] = 0x43;
cmd[2] = 0x54;
cmd[3] = 0x4c;
cmd[8] = 1;
cmd[9] = 0x50;
if (up) cmd[4] = 1;
if (down) cmd[5] = 1;
if (left) cmd[6] = 1;
if (right) cmd[7] = 1;
if (light) cmd[8] = 0;
if (turbo) cmd[9] = 0x64;
// console.log(cmd.tohex());
return cmd
}
function handleNotificationsBattary(event) {
let value = event.target.value;
let decrypt = decryptAES(value.buffer)
batteryEl.innerHTML = decrypt[4];
}
setInterval(async function () {
if (!bluetooth) return;
await sendMessage();
}, 100);
window.addEventListener("keydown", function(event) {
switch (event.key) {
case "ArrowUp": {
bt_up = true;
break
}
case "ArrowDown": {
bt_down = true;
break;
}
case "ArrowLeft": {
bt_left = true;
break
}
case "ArrowRight": {
bt_right = true;
break
}
}
});
window.addEventListener("keyup", function (event) {
switch (event.key) {
case "ArrowUp": {
bt_up = false;
break
}
case "ArrowDown": {
bt_down = false;
break;
}
case "ArrowLeft": {
bt_left = false;
break
}
case "ArrowRight": {
bt_right = false;
break
}
}
})
</script>
</body>
</html>
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