how to communicate with a serial port using flutter_libserialport package

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Flutter, an open-source mobile application development framework, has been gaining popularity among developers for creating high-performance, cross-platform apps. One of the features that Flutter provides is the ability to communicate with external devices through a serial port.

In this article, we will be discussing how to send and receive data through a serial port using the flutter_libserialport package in Flutter.

First, you will need to add the flutter_libserialport package to your pubspec.yaml file.

dependencies:
  flutter_libserialport: ^0.2.0

Next, you will need to import the package in your dart file.

Copy code
import 'package:flutter_libserialport/flutter_libserialport.dart';
To send data through the serial port, you will need to first open the serial port by calling the open method on the SerialPort class. You will need to pass the name of the serial port and the baud rate as parameters.

SerialPort serialPort = new SerialPort();
await serialPort.open("COM3", 9600);

Once the serial port is open, you can use the write method to send data. The write method takes a Uint8List as a parameter, so you will need to convert your data to a Uint8List before sending.

Uint8List data = Uint8List.fromList("Hello World!".codeUnits);
await serialPort.write(data);

To receive data through the serial port, you will need to use the read method. The read method returns a Future that contains the received data.

Uint8List receivedData = await serialPort.read();
print(String.fromCharCodes(receivedData));

After you are done with the serial port, you should close it by calling the close method.

await serialPort.close();

In this article, we have discussed how to send and receive data through a serial port using the flutter_libserialport package in Flutter. This package provides a simple and easy-to-use API for communicating with external devices through a serial port, making it a great choice for your next Flutter project that requires serial communication.