rtl_ir_control 1.0.1

A utility designed to simplify the setup and configuration of Remotec products using Bluetooth Low Energy (BLE).

rtl_ir_control

A Flutter package for setup and controlling infrared (IR) devices via Bluetooth. This package leverages esp_blufi and flutter_blue_plus to set up and manage Bluetooth Low Energy (BLE) connections and download ir code from api call to device.

Features

• Device scanning and connection management using BLE.
• Blufi setup for Roomate devices.
• Downloading IR code for device control.

Dependencies

This package relies on the following external packages:

• esp_blufi: For BLE communication with ESP-based devices.
• flutter_blue_plus: For Bluetooth Low Energy operations on Android and iOS.

Setup

Permission

To use this package, you must configure Bluetooth permissions for your Flutter app. Below are the steps for Android and iOS.

Android

Add the following to android/app/src/main/AndroidManifest.xml:

<!-- Tell Google Play Store that your app uses Bluetooth LE
     Set android:required="true" if bluetooth is necessary -->
<uses-feature android:name="android.hardware.bluetooth_le" android:required="false" />

        <!-- New Bluetooth permissions in Android 12
        https://developer.android.com/about/versions/12/features/bluetooth-permissions -->
<uses-permission android:name="android.permission.BLUETOOTH_SCAN" />
<uses-permission android:name="android.permission.BLUETOOTH_CONNECT" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

        <!-- legacy for Android 11 or lower -->
<uses-permission android:maxSdkVersion="30" android:name="android.permission.BLUETOOTH" />
<uses-permission android:maxSdkVersion="30" android:name="android.permission.BLUETOOTH_ADMIN" />

        <!-- legacy for Android 9 or lower -->
<uses-permission android:maxSdkVersion="28"
android:name="android.permission.ACCESS_COARSE_LOCATION" />

iOS

• In the ios/Runner/Info.plist let’s add:

<dict>
    <key>NSBluetoothAlwaysUsageDescription</key>
    <string>This app needs Bluetooth to function</string>
</dict>

• To use ble in app background, add the following to your Info.plist

<dict>
    <key>UIBackgroundModes</key>
    <array>
        <string>bluetooth-central</string>
    </array>
</dict>

Note: Ensure that Bluetooth and location permissions have been granted for the app.

How to use

1. Scan Devices

Scan for Roomate devices using a name prefix filter.

import 'package:rtl_ir_control/rtl_ir_control.dart';

void scanDevices() {
  // make sure all permissions were granted
  _rtlIrControlPlugin.startScan(namePrefix: ['Roomate']);
}

2. Setup Device

Connect to a device, scan for Wi-Fi networks, and configure Wi-Fi credentials.

import 'package:rtl_ir_control/rtl_ir_control.dart';

Future<void> setupDevice(String id) async {
  final blufi = RTLBlufiSetupUtils();

  try {
    // Set device ID form scan
    await blufi.setCurrentId(id);

    // Establish connection
    await blufi.connect();

    // Scan for Wi-Fi networks
    var wifiList = await blufi.scanWifiList();

    // Select Wi-Fi (replace with your UI logic)
    var ssid = await selectWifi(wifiList);

    // Get password (replace with your UI logic)
    var password = await inputPassword(ssid);

    // Provision Wi-Fi credentials
    await blufi.configProvision(ssid: ssid, password: password);
    
    print("completed");
    
  } catch (e) {
    print("Setup failed: $e");
  }
}

// Placeholder UI functions
Future<String> selectWifi(List<String> wifiList) async {
  return wifiList.first; // Replace with actual selection logic
}

Future<String> inputPassword(String ssid) async {
  return "your_password"; // Replace with actual input logic
}

3. Decoding API Response to IR Codeset

Convert api response to ir codeset for download

void decodeIrCodeset(String jsonResponse) {
  try {
    // Decode codeset from API response
    RTLIrCodeset codeset = RTLIrCodeset.fromApiJson(jsonResponse);
    print("Successfully decoded IR codeset: ${codeset.toString()}");
  } catch (e) {
    print("Failed to decode IR codeset: $e");
  }
}

4. Download IR Codeset

Download IR codes to bluetooth device

import 'package:rtl_ir_control/rtl_ir_control.dart';

Future<void> downloadCodes(String id, RTLIrCodeset codeset) async {
  try {
    // Get device instance
    var device = RtlIrControl().getDevice(id);

    // Connect to device
    await device.connect();

    // Initialize handler
    RoomateDeviceHandler handler = RoomateDeviceHandler(device);

    // Download codeset with progress updates
    handler.downloadCodeFromCodeset(
      channel: 1,
      brandName: "LG",
      codeNum: "81",
      codeset: codeset,
    ).listen(
          (progress) => print("Download progress: $progress%"),
      onDone: () => print("Download completed"),
      onError: (e) => print("Download failed: $e"),
    );
  } catch (e) {
    print("Code download failed: $e");
  }
}

5. Delete IR Codeset

Delete IR codes with channel

import 'package:rtl_ir_control/rtl_ir_control.dart';

Future<void> deleteCodes(String id, int channel) async {
  try {

    // Get device instance
    var device = RtlIrControl().getDevice(id);

    // Connect to device
    await device.connect();

    // Initialize handler
    RoomateDeviceHandler handler = RoomateDeviceHandler(device);

    // Delete IR Codeset with channel
    await handler.deleteCode(channel);
  } catch (e) {
    print("Delete code failed: $e");
  }
}

Custom Device Handler

Extend the functionality of rtl_ir_control by creating a custom DeviceHandler tailored to your Bluetooth device.

import 'package:rtl_ir_control/rtl_ir_control.dart';

class CustomDeviceHandler extends GeneralDeviceHandler {
  // Custom UUIDs for your device's BLE service and characteristic
  static final RTLBluetoothUuid customServiceUuid =
  RTLBluetoothUuid('00001800-0000-1000-8000-00805f9b34fb'); // Generic Access service
  static final RTLBluetoothUuid customCharacteristicUuid =
  RTLBluetoothUuid('00002a00-0000-1000-8000-00805f9b34fb'); // Device Name characteristic

  // Constructor takes an RTLBluetoothDevice instance
  CustomDeviceHandler(super.rtlBluetoothDevice);

  // Read raw data from the device as a byte list
  Future<List<int>> readCustomData() async {
    final value = await rtlBluetoothDevice.readData(
      customServiceUuid,
      customCharacteristicUuid,
    );
    return value; // Returns raw bytes (e.g., for further processing)
  }

  // Send a custom command to the device
  Future<void> sendCustomCommand(List<int> data) async {
    await rtlBluetoothDevice.sendCommand(
      customServiceUuid,
      customCharacteristicUuid,
      data, // Byte list representing your command
    );
  }

  // Stream progress for a custom operation (e.g., firmware update)
  Stream<int> performCustomOperation(int param) async* {
    for (var i = 0; i <= 100; i += 20) {
      await Future.delayed(Duration(milliseconds: 500)); // Simulate async work
      yield i; // Emit progress percentage
    }
    // Replace with your device's specific operation logic
  }
}

Once you've created your CustomDeviceHandler, use the following example to call its methods:

// Usage
Future<void> useCustomHandler(String deviceId) async {
  try {
    // Retrieve and connect to the device
    var device = RtlIrControl().getDevice(deviceId);
    await device.connect();

    // Instantiate your custom handler
    var handler = CustomDeviceHandler(device);

    // Read data (raw bytes)
    List<int> data = await handler.readCustomData();
    print("Custom data (bytes): $data");

    // Send a sample command
    await handler.sendCustomCommand([0x01, 0x02, 0x03]);
    print("Command sent successfully");

    // Monitor a custom operation's progress
    handler.performCustomOperation(42).listen(
          (progress) => print("Operation progress: $progress%"),
      onDone: () => print("Operation completed"),
    );
  } catch (e) {
    print("Error in custom handler usage: $e");
  }
}

Notes

• Handle exceptions (e.g., RTLBluetoothException) for errors like timeouts or permission issues.

• The package is tailored for Roomate devices; adapt for other devices as needed.

• Use a real API response for apiJson in production.