Can this package be used to communicate with an Arduino Uno from a Flutter Desktop application? Link to any similar sample codes would be really helpful. about flutter_libserialport HOT 6 CLOSED

Is this is what you guys are trying to achieve?

The counter is from the Arduino.

Super simple Arduino code:

int i = 0;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
  Serial.println(i);
  i++;
  delay(1000);
}

Flutter (Dart) code:

import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:flutter_libserialport/flutter_libserialport.dart';

class ScorePage extends StatefulWidget {
  const ScorePage({super.key});

  @override
  State<ScorePage> createState() => _ScorePageState();
}

class _ScorePageState extends State<ScorePage> {
  SerialPort port = SerialPort('COM9');
  late SerialPortReader reader;

  @override
  void initState() {
    super.initState();
    var res = port.openRead();

    if (!res) {
      print('Error opening port:${port.name}');
      // handle to close reconnet
    }
    var portConfig = SerialPortConfig()
      ..baudRate = 9600
      ..bits = 8
      ..stopBits = 1;
    port.config = portConfig;

    reader = SerialPortReader(port);
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Center(
        child: StreamBuilder<Uint8List>(
          stream: reader.stream,
          builder: (context, snapshot) {
            if (snapshot.hasError) {
              return Text('Error: ${snapshot.error}');
            }
            if (snapshot.connectionState == ConnectionState.waiting) {
              return const Text('Awaiting result...');
            }

            var decodedString = String.fromCharCodes(snapshot.data!);
            return Column(
              mainAxisAlignment: MainAxisAlignment.center,
              children: <Widget>[
                const Text(
                  'Counter from Arduino:',
                ),
                Text(
                  decodedString,
                  style: Theme.of(context).textTheme.headline1,
                ),
              ],
            );
          },
        ),
      ),
    );
  }

  @override
  void dispose() {
    port.close();
    super.dispose();
  }
}

Sometimes you may need to disconnect and reconnect the USB cable.

from flutter_libserialport.

I am interested in the answer too. I am trying to use this for a Flutter desktop app with ESP32

from flutter_libserialport.

Have you solved this yet? I want use this for a Flutter desktop app with STM32.

from flutter_libserialport.

Having same issue.
But open the serial port in Arduino IDE first then open the port with this package everything works fine.

Did anyone solve this problem?

from flutter_libserialport.

Is this is what you guys are trying to achieve?

The counter is from the Arduino.

2022-12-22.19-39-18.mp4
Super simple Arduino code:

int i = 0;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
  Serial.println(i);
  i++;
  delay(1000);
}

Flutter (Dart) code:

import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:flutter_libserialport/flutter_libserialport.dart';

class ScorePage extends StatefulWidget {
  const ScorePage({super.key});

  @override
  State<ScorePage> createState() => _ScorePageState();
}

class _ScorePageState extends State<ScorePage> {
  SerialPort port = SerialPort('COM9');
  late SerialPortReader reader;

  @override
  void initState() {
    super.initState();
    var res = port.openRead();

    if (!res) {
      print('Error opening port:${port.name}');
      // handle to close reconnet
    }
    var portConfig = SerialPortConfig()
      ..baudRate = 9600
      ..bits = 8
      ..stopBits = 1;
    port.config = portConfig;

    reader = SerialPortReader(port);
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Center(
        child: StreamBuilder<Uint8List>(
          stream: reader.stream,
          builder: (context, snapshot) {
            if (snapshot.hasError) {
              return Text('Error: ${snapshot.error}');
            }
            if (snapshot.connectionState == ConnectionState.waiting) {
              return const Text('Awaiting result...');
            }

            var decodedString = String.fromCharCodes(snapshot.data!);
            return Column(
              mainAxisAlignment: MainAxisAlignment.center,
              children: <Widget>[
                const Text(
                  'Counter from Arduino:',
                ),
                Text(
                  decodedString,
                  style: Theme.of(context).textTheme.headline1,
                ),
              ],
            );
          },
        ),
      ),
    );
  }

  @override
  void dispose() {
    port.close();
    super.dispose();
  }
}

Sometimes you may need to disconnect and reconnect the USB cable.

This closes the inquiry, thanks @iqfareez

from flutter_libserialport.

Is this is what you guys are trying to achieve?

The counter is from the Arduino.

2022-12-22.19-39-18.mp4
Super simple Arduino code:

int i = 0;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
  Serial.println(i);
  i++;
  delay(1000);
}

Flutter (Dart) code:

import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:flutter_libserialport/flutter_libserialport.dart';

class ScorePage extends StatefulWidget {
  const ScorePage({super.key});

  @override
  State<ScorePage> createState() => _ScorePageState();
}

class _ScorePageState extends State<ScorePage> {
  SerialPort port = SerialPort('COM9');
  late SerialPortReader reader;

  @override
  void initState() {
    super.initState();
    var res = port.openRead();

    if (!res) {
      print('Error opening port:${port.name}');
      // handle to close reconnet
    }
    var portConfig = SerialPortConfig()
      ..baudRate = 9600
      ..bits = 8
      ..stopBits = 1;
    port.config = portConfig;

    reader = SerialPortReader(port);
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Center(
        child: StreamBuilder<Uint8List>(
          stream: reader.stream,
          builder: (context, snapshot) {
            if (snapshot.hasError) {
              return Text('Error: ${snapshot.error}');
            }
            if (snapshot.connectionState == ConnectionState.waiting) {
              return const Text('Awaiting result...');
            }

            var decodedString = String.fromCharCodes(snapshot.data!);
            return Column(
              mainAxisAlignment: MainAxisAlignment.center,
              children: <Widget>[
                const Text(
                  'Counter from Arduino:',
                ),
                Text(
                  decodedString,
                  style: Theme.of(context).textTheme.headline1,
                ),
              ],
            );
          },
        ),
      ),
    );
  }

  @override
  void dispose() {
    port.close();
    super.dispose();
  }
}

Sometimes you may need to disconnect and reconnect the USB cable.

No, i need to perform write and read. read is working but write isn't working

from flutter_libserialport.