Initial commit: BLE relay controller for Atom VoiceS3R
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eddy
commit
7c9dde172a
15 changed files with 764 additions and 0 deletions
28
android/app/src/main/AndroidManifest.xml
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28
android/app/src/main/AndroidManifest.xml
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<?xml version="1.0" encoding="utf-8"?>
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<manifest xmlns:android="http://schemas.android.com/apk/res/android">
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<uses-permission android:name="android.permission.BLUETOOTH" android:maxSdkVersion="30"/>
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<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" android:maxSdkVersion="30"/>
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<uses-permission android:name="android.permission.BLUETOOTH_SCAN"/>
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<uses-permission android:name="android.permission.BLUETOOTH_CONNECT"/>
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<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
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<uses-feature android:name="android.hardware.bluetooth_le" android:required="true"/>
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<application
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android:allowBackup="true"
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android:label="Atom Relay"
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android:supportsRtl="true"
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android:theme="@style/Theme.AppCompat.Light">
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<activity
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android:name=".MainActivity"
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android:exported="true"
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android:screenOrientation="portrait">
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<intent-filter>
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<action android:name="android.intent.action.MAIN"/>
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<category android:name="android.intent.category.LAUNCHER"/>
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</intent-filter>
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</activity>
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</application>
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</manifest>
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232
android/app/src/main/java/com/eddy/atomrelay/MainActivity.kt
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232
android/app/src/main/java/com/eddy/atomrelay/MainActivity.kt
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package com.eddy.atomrelay
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import android.Manifest
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import android.annotation.SuppressLint
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import android.bluetooth.BluetoothAdapter
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import android.bluetooth.BluetoothDevice
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import android.bluetooth.BluetoothGatt
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import android.bluetooth.BluetoothGattCallback
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import android.bluetooth.BluetoothGattCharacteristic
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import android.bluetooth.BluetoothGattDescriptor
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import android.bluetooth.BluetoothProfile
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import android.bluetooth.le.ScanCallback
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import android.bluetooth.le.ScanResult
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import android.content.pm.PackageManager
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import android.os.Bundle
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import android.os.Handler
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import android.os.Looper
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import android.util.Log
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import android.view.MotionEvent
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import android.widget.Button
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import android.widget.TextView
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import androidx.appcompat.app.AppCompatActivity
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import androidx.core.app.ActivityCompat
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import java.util.UUID
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class MainActivity : AppCompatActivity() {
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companion object {
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private const val TAG = "AtomRelay"
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private val SERVICE_UUID: UUID = UUID.fromString("4fafc201-1fb5-459e-8fcc-c5c9c331914b")
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private val CHARACTERISTIC_UUID: UUID = UUID.fromString("beb5483e-36e1-4688-b7f5-ea07361f26d8")
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private val CCCD_UUID: UUID = UUID.fromString("00002902-0000-1000-8000-00805f9b34fb")
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private const val DEVICE_NAME = "AtomS3R-Relay"
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}
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private var bluetoothGatt: BluetoothGatt? = null
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private var relayCharacteristic: BluetoothGattCharacteristic? = null
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private var isScanning = false
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private val handler = Handler(Looper.getMainLooper())
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private lateinit var statusText: TextView
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private lateinit var relayButton: Button
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private lateinit var scanButton: Button
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private val scanCallback = object : ScanCallback() {
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override fun onScanResult(callbackType: Int, result: ScanResult) {
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val device = result.device
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val name = device?.name ?: ""
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Log.d(TAG, "Found device: $name (${device?.address})")
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if (name == DEVICE_NAME) {
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stopScan()
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connectToDevice(device)
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}
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}
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}
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private val gattCallback = object : BluetoothGattCallback() {
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override fun onConnectionStateChange(gatt: BluetoothGatt, status: Int, newState: Int) {
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if (newState == BluetoothProfile.STATE_CONNECTED) {
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Log.d(TAG, "GATT connected, discovering services...")
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gatt.discoverServices()
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} else if (newState == BluetoothProfile.STATE_DISCONNECTED) {
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Log.d(TAG, "GATT disconnected")
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runOnUiThread {
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statusText.text = "Reconnecting..."
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relayButton.isEnabled = false
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}
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gatt.close()
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bluetoothGatt = null
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relayCharacteristic = null
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// Auto-reconnect after 2 seconds
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handler.postDelayed({ startScan() }, 2000)
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}
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}
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@SuppressLint("MissingPermission")
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override fun onServicesDiscovered(gatt: BluetoothGatt, status: Int) {
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val service = gatt.getService(SERVICE_UUID)
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if (service != null) {
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relayCharacteristic = service.getCharacteristic(CHARACTERISTIC_UUID)
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if (relayCharacteristic != null) {
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// Enable notifications
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gatt.setCharacteristicNotification(relayCharacteristic, true)
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val descriptor = relayCharacteristic!!.getDescriptor(CCCD_UUID)
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descriptor.value = BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE
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gatt.writeDescriptor(descriptor)
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Log.d(TAG, "Services discovered, relay characteristic found")
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runOnUiThread {
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statusText.text = "Connected"
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relayButton.isEnabled = true
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}
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}
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} else {
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Log.e(TAG, "Service not found")
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runOnUiThread { statusText.text = "Service not found" }
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}
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}
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override fun onCharacteristicWrite(
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gatt: BluetoothGatt,
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characteristic: BluetoothGattCharacteristic,
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status: Int
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) {
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Log.d(TAG, "Write status: $status")
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}
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}
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override fun onCreate(savedInstanceState: Bundle?) {
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super.onCreate(savedInstanceState)
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setContentView(R.layout.activity_main)
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statusText = findViewById(R.id.statusText)
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relayButton = findViewById(R.id.relayButton)
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scanButton = findViewById(R.id.scanButton)
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scanButton.setOnClickListener { startScan() }
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setupRelayButton()
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// Auto-connect on app start
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handler.postDelayed({ startScan() }, 500)
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}
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@Deprecated("Deprecated in Java")
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override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<out String>, grantResults: IntArray) {
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super.onRequestPermissionsResult(requestCode, permissions, grantResults)
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if (requestCode == 1 && grantResults.all { it == PackageManager.PERMISSION_GRANTED }) {
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startScan()
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}
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}
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private fun setupRelayButton() {
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relayButton.setOnTouchListener { _, event ->
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when (event.action) {
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MotionEvent.ACTION_DOWN -> {
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sendRelayCommand(true)
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relayButton.text = "ON"
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true
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}
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MotionEvent.ACTION_UP, MotionEvent.ACTION_CANCEL -> {
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sendRelayCommand(false)
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relayButton.text = "HOLD"
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true
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}
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else -> false
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}
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}
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}
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@SuppressLint("MissingPermission")
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private fun startScan() {
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if (isScanning) return
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if (!hasPermissions()) {
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requestPermissions()
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return
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}
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val adapter = BluetoothAdapter.getDefaultAdapter()
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if (adapter == null || !adapter.isEnabled) {
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statusText.text = "Bluetooth not enabled"
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return
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}
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isScanning = true
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statusText.text = "Scanning..."
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scanButton.isEnabled = false
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Log.d(TAG, "Starting BLE scan for $DEVICE_NAME")
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adapter.bluetoothLeScanner.startScan(scanCallback)
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// Stop scan after 10 seconds
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handler.postDelayed({
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if (isScanning) stopScan()
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}, 10000)
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}
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@SuppressLint("MissingPermission")
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private fun stopScan() {
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if (!isScanning) return
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isScanning = false
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scanButton.isEnabled = true
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val adapter = BluetoothAdapter.getDefaultAdapter()
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adapter?.bluetoothLeScanner?.stopScan(scanCallback)
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if (statusText.text == "Scanning...") {
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statusText.text = "Device not found"
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}
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}
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@SuppressLint("MissingPermission")
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private fun connectToDevice(device: BluetoothDevice) {
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runOnUiThread { statusText.text = "Connecting..." }
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Log.d(TAG, "Connecting to ${device.address}")
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bluetoothGatt = device.connectGatt(this, false, gattCallback)
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}
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@SuppressLint("MissingPermission")
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private fun sendRelayCommand(on: Boolean) {
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val char = relayCharacteristic ?: return
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val gatt = bluetoothGatt ?: return
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char.value = byteArrayOf(if (on) 0x01 else 0x00)
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char.writeType = BluetoothGattCharacteristic.WRITE_TYPE_NO_RESPONSE
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gatt.writeCharacteristic(char)
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Log.d(TAG, "Sent relay ${if (on) "ON" else "OFF"}")
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}
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private fun getRequiredPermissions(): Array<String> {
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return if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.S) {
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arrayOf(
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Manifest.permission.BLUETOOTH_SCAN,
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Manifest.permission.BLUETOOTH_CONNECT,
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Manifest.permission.ACCESS_FINE_LOCATION
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)
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} else {
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arrayOf(Manifest.permission.ACCESS_FINE_LOCATION)
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}
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}
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private fun hasPermissions(): Boolean {
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return getRequiredPermissions().all {
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ActivityCompat.checkSelfPermission(this, it) == PackageManager.PERMISSION_GRANTED
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}
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}
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private fun requestPermissions() {
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ActivityCompat.requestPermissions(this, getRequiredPermissions(), 1)
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}
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override fun onDestroy() {
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super.onDestroy()
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stopScan()
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bluetoothGatt?.close()
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}
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}
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32
android/app/src/main/res/layout/activity_main.xml
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android/app/src/main/res/layout/activity_main.xml
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<?xml version="1.0" encoding="utf-8"?>
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<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
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android:layout_width="match_parent"
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android:layout_height="match_parent"
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android:orientation="vertical"
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android:gravity="center"
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android:padding="32dp">
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<TextView
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android:id="@+id/statusText"
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android:layout_width="wrap_content"
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android:layout_height="wrap_content"
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android:text="Disconnected"
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android:textSize="20sp"
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android:layout_marginBottom="48dp"/>
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<Button
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android:id="@+id/relayButton"
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android:layout_width="200dp"
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android:layout_height="200dp"
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android:text="HOLD"
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android:textSize="24sp"
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android:enabled="false"/>
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<Button
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android:id="@+id/scanButton"
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android:layout_width="wrap_content"
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android:layout_height="wrap_content"
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android:text="Scan & Connect"
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android:layout_marginTop="48dp"/>
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</LinearLayout>
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4
android/app/src/main/res/values/strings.xml
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4
android/app/src/main/res/values/strings.xml
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<?xml version="1.0" encoding="utf-8"?>
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<resources>
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<string name="app_name">Atom Relay</string>
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</resources>
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