Arduino bluetooth demo - Flutter client-side bluetooth bridge

bt-controller.dart

import 'package:flutter/services.dart';
import 'dart:async';

class BTController {

    static const platform = const MethodChannel('flutter.native/helper');

    static Function _onData = (String string) => { };

    static init(Function onData) {
        
        _onData = onData;
        platform.setMethodCallHandler(_handler);
    }

    static Future<dynamic> _handler(MethodCall call) {

        return Future.value(_onData(call.arguments));
    }

    static Future<List<dynamic>> enumerateDevices() async {
        
        print('enumerating devices');
        
        try { return await platform.invokeMethod('enumerate-devices'); }
        on PlatformException catch (e) { return []; }
    }

    static Future<void> connect(String address) async {

        print('connecting ' + address);

        try { return await platform.invokeMethod('connect', address); }
        on PlatformException catch (e) {  }
    }

    static Future<void> transmit(String data) async {

        try { return await platform.invokeMethod('transmit', data); }
        on PlatformException catch (e) {  }
    }
}