How do I connect to HC-05 of Arduino in Flutter?

Question

import 'package:flutter/material.dart';
import 'package:flutter_bluetooth_serial/flutter_bluetooth_serial.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  FlutterBluetoothSerial flutterBluetoothSerial =
      FlutterBluetoothSerial.instance;
  BluetoothDevice? device;

  @override
  void initState() {
    super.initState();

    // Start scanning for Bluetooth devices.
    flutterBluetoothSerial.();

    // Listen for scan results.
    flutterBluetoothSerial.scanResults.listen((scanResults) {
      for (var scanResult in scanResults) {
        if (scanResult.device.name == "HC-05") {
          device = scanResult.device;
          connectToDevice();
        }
      }
    });
  }

  void connectToDevice() async {
    await device.connect();
    print("Connected to HC-05");

    // Send some data to the HC-05 module.
    device.write("Hello, world!");

    // Receive some data from the HC-05 module.
    String data = await device.read();
    print("Received data from HC-05: $data");
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text("Connect to HC-05"),
        ),
      ),
    );
  }
}

I am not able to connect to HC-05 using this code. Can anyone point out the mistake in this or provide me with another way to connect to my module?

I want to receive a text from HC-05 but my Flutter app is not connecting to the module.

Answer 1

You can try this:

connection = await BluetoothConnection.toAddress("MAC Address HC-05"); //Use your MAC address here