Flutter_libserialport

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flutter_libserialport

flutter_libserialport is a Flutter plugin that provides access to the LibSerialport library, which is a cross-platform library for serial port communications. With this plugin, developers can communicate with external devices over serial ports using the Flutter framework.

Installation

To install the flutter_libserialport plugin, follow these steps:

  1. Add the following dependency to your pubspec.yaml file:
    2. dependencies:
  flutter_libserialport: ^1.0.0
  2. Run the command flutter pub get to fetch the package.
  3. Import the library in your Flutter project:
    4. import 'package:flutter_libserialport/flutter_libserialport.dart';

Usage

Once the plugin is installed, you can use it to communicate with serial ports. Here’s an example of how to use the flutter_libserialport plugin:

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

class SerialPortExample extends StatefulWidget {
  @override
  _SerialPortExampleState createState() => _SerialPortExampleState();
}

class _SerialPortExampleState extends State {
  SerialPort _serialPort;
  
  @override
  void initState() {
    super.initState();
    openSerialPort();
  }
  
  void openSerialPort() async {
    List ports = await FlutterLibSerialport.getAvailablePorts();
    if (ports.isNotEmpty) {
      String portName = ports[0].port;
      _serialPort = SerialPort(portName);
      
      bool opened = await _serialPort.open(BaudRate.baud9600);
      if (opened) {
        _serialPort.onDataReceived.listen((List data) {
          print('Received: $data');
        });
      }
    }
  }
  
  void writeData() async {
    if (_serialPort != null && _serialPort.isOpen) {
      await _serialPort.write([0x01, 0x02, 0x03]);
    }
  }
  
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: const Text('Serial Port Example')),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            RaisedButton(
              child: Text('Write Data'),
              onPressed: writeData,
            ),
          ],
        ),
      ),
    );
  }
}

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

In the above example, the openSerialPort method retrieves available serial ports and opens the first one if any. It also listens for data received on the port. The writeData method writes data to the open serial port when the button is pressed.

Additional Configuration

The flutter_libserialport plugin provides additional configuration options. For example:

  • stopBits: Specify the number of stop bits.
  • parity: Specify the parity type.
  • dataBits: Specify the number of data bits.
  • flowControl: Specify the flow control type.

These options can be set when opening a serial port using the open method of the SerialPort class.

Conclusion

The flutter_libserialport plugin allows Flutter developers to communicate with external devices over serial ports. The provided example demonstrates how to open and write data to a serial port. Additional configuration options are available for fine-tuning the serial port communication parameters.

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