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<html>
<head>
<title>Setup AIRMX device</title>
</head>
<body>
<h1>Setup your AIRMX device</h1>
<div>
<button id="connect" type="button">
Connect
</button>
</div>
<script>
const DEVICE_NAME = 'AIRMX Pro'
const MAIN_SERVICE_UUID = '22210000-554a-4546-5542-46534450464d'
const WRITE_CHAR_UUID = '22210001-554a-4546-5542-46534450464d'
const NOTIFY_CHAR_UUID = '22210002-554a-4546-5542-46534450464d'
class Dispatcher {
#characteristic
#sequenceNumber = 1
#chunkSize = 16
constructor(characteristic) {
this.#characteristic = characteristic
}
async dispatch(command) {
const data = this.#chunk(command.payload, command)
for (let chunk of data) {
console.log(`Sending chunk: ${Array.from(chunk).map(b => b.toString(16).padStart(2, '0')).join(' ')}`)
await this.#characteristic.writeValueWithResponse(chunk)
await delay(500)
}
}
#chunk(data, command) {
const packets = this.#chunked(data, this.#chunkSize)
const total = packets.length
if (total === 0) {
return [
this.#packetHeader(
this.#sequenceNumber++, 1, 1, // 1 of 1 packet
command.commandId
)
]
}
return packets.map((chunk, index) => {
return new Uint8Array([
...this.#packetHeader(
this.#sequenceNumber++, index + 1, total,
command.commandId
),
...chunk
])
})
}
/**
* Splits an array into chunks of `size`.
*
* @param {Uint8Array} data - The array of 8-bit unsigned integers.
* @param {number} size - The size of each chunk.
*/
#chunked(data, size) {
const packets = []
for (let i = 0; i < data.length; i += size) {
packets.push(data.slice(i, i + size))
}
return packets
}
#packetHeader(sequenceNumber, currentPacket, totalPacket, commandId) {
return new Uint8Array([
sequenceNumber,
currentPacket << 4 | totalPacket,
0x00, // Unencrypted flag
commandId
])
}
}
class Command {
get commandId() {
throw new Error('The command ID does not exist.')
}
get payload() {
throw new Error('The payload does not exist.')
}
}
class HandshakeCommand extends Command {
get commandId() {
return 0x0b
}
get payload() {
return new Uint8Array([
0x08, // The storage size of the token
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // Token: 0
0x05, // The length of the version
0x31, 0x2e, 0x30, 0x2e, 0x30 // Version: 1.0.0
])
}
}
class ConfigureWifiCommand extends Command {
#ssid
#password
constructor(ssid, password) {
super()
this.#ssid = ssid
this.#password = password
}
get commandId() {
return 0x15
}
get payload() {
const encoder = new TextEncoder()
const ssid = encoder.encode(this.#ssid)
const password = encoder.encode(this.#password)
return new Uint8Array([
ssid.length, ...ssid,
password.length, ...password
])
}
}
class RequestIdentityCommand extends Command {
get commandId() {
return 0x16
}
get payload() {
return new Uint8Array([
//
])
}
}
async function delay(ms) {
return new Promise(resolve => setTimeout(resolve, ms))
}
async function connectToDevice() {
const device = await navigator.bluetooth.requestDevice({
filters: [{ name: DEVICE_NAME }],
optionalServices: [MAIN_SERVICE_UUID]
})
const server = await device.gatt.connect()
const service = await server.getPrimaryService(MAIN_SERVICE_UUID)
const writeChar = await service.getCharacteristic(WRITE_CHAR_UUID)
const notifyChar = await service.getCharacteristic(NOTIFY_CHAR_UUID)
await notifyChar.startNotifications()
notifyChar.addEventListener('characteristicvaluechanged', handleDeviceResponse)
const dispatcher = new Dispatcher(writeChar)
await dispatcher.dispatch(new HandshakeCommand())
await dispatcher.dispatch(new ConfigureWifiCommand('<ssid>', '<password>'))
await dispatcher.dispatch(new RequestIdentityCommand())
}
function handleDeviceResponse(event) {
const value = event.target.value
const receivedBytes = []
for (let i = 0; i < value.byteLength; i++) {
receivedBytes.push(value.getUint8(i).toString(16).padStart(2, '0'))
}
console.log(`Received data from device: ${receivedBytes.join(' ')}`)
}
const connect = document.getElementById('connect')
connect.addEventListener('click', connectToDevice)
</script>
</body>
</html>
|
