flutter_serial

Description:

flutter serial

Flutter Serial! #
An Android Plugin for Serial Communication which allow you to read
and write the data through the available ports
The supported features are:

Listing the available serial ports on the device, including USB to serial adapters
Configuring serial ports (baud rate, input type)
Providing standard InputStream and OutputStream

Description #
This PlugIn enables the communication with the
USB
RS232
RS485
UART
Supported platforms:

Android :arm65-v8a, armeabi,armeabi-v7a,mips,mips64,x86,x86_64

Connection Setup #

User Interface is connected to rs232 converter which sending data to machine receiving the data(You can use any Serial data receiving software for testing purposes.I have used Realterm : Serial Capture Program that is available for windows)
USB-A to micro USB cable used in the image to connect Commercial Android intelligent display terminal running Android 11 operating system with laptop for debugging purposes only.



Features #

Doesn't require root in Android
Easy to use
Using listener for reading message


Add a dependency to your pubspec.yaml
dependencies:
flutter_serial: latest_version
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include the usbserial package at the top of your dart file.
import 'package:flutter_serial/flutter_serial.dart';
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❓ Usage #
If you encounter any issues please refer to the API docs and the sample code in the example directory.
The example directory has a sample application that demonstrates the features of this plugin.

🔧 Android Setup #
Initialisation
The first step is to call the startSerial() method and subscribe the
StreamSubscription
Start Serial #
startSerial method will open the transaction stream
FlutterSerial flutterSerial = FlutterSerial();

@override
void initState() {
super.initState();
flutterSerial.startSerial().listen(_updateConnectionStatus);
getSerialList();
}

void _updateConnectionStatus(SerialResponse? result) async {
logData = result!.logChannel ?? "";
receivedData = result.readChannel ?? "";
});
}
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By calling the startSerial() it will provide you with the SerialResponse in the form of stream data
SerialResponse
In Serial Response you will get the following type


Log Channel (type:String)


Read Channel (type:String)


Log Channel:
In the log channel you wll get the repsone when you open any port
,close any port , transmit data (TX).


Read Channel:
In the Read channel you wll get the Recived data (RX)


Available Ports #
The getAvailablePorts() method will return you all the
available ports on a device
serialList = await flutterSerial.getAvailablePorts();
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Open #
openPort method will open the serial communication
Its has 3 required parameter
{ DataFormat dataFormat, String serialPort, int baudRate }
flutterSerial.openPort(
dataFormat: DataFormat.ASCII,
serialPort: serialList.first,
baudRate: flutterSerial.baudRateList.first)
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Close #
closePort method will close the port if you have opened any port
flutterSerial.closePort();
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Send Command #
sendCommand method will send your message
Its has 1 required parameter {String message}
flutterSerial.sendCommand(message: "message");
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Clear #
clearLog method will clear the Log channel
clearRead method will clear the Read channel
flutterSerial.clearLog();
flutterSerial.clearRead();
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Destroy #
destroy method will eliminate the resources
@override
void dispose() {
flutterSerial.destroy();
super.dispose();
}
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Baud Rate
To get the Standard baud rates list
call the FlutterSerial().baudRateList
it will return the integer list of standard baud rate


Data Format
The Data format is used to convert the data type
To pass the data format in the open() method parameter
For ascii format
call the DataFormat.ASCII
For hex_String format
call the DataFormat.HEX_STRING