Arduino Reference - SoftwareSerialListen

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SoftwareSerial: listen()

Description

Enables the selected software serial port to listen. Only one software serial port can listen at a time; data that arrives for other ports will be discarded. Any data already received is discarded during the call to listen() (unless the given instance is already listening).

Syntax

mySerial.listen()

Parameters

mySerial:the name of the instance to listen

Returns

None

Example

#include <SoftwareSerial.h>

// software serial : TX = digital pin 10, RX = digital pin 11
SoftwareSerial portOne(10, 11);

// software serial : TX = digital pin 8, RX = digital pin 9
SoftwareSerial portTwo(8, 9);

void setup()
{
// Start the hardware serial port
Serial.begin(9600);

// Start both software serial ports
portOne.begin(9600);
portTwo.begin(9600);

}

void loop()
{
portOne.listen();

if (portOne.isListening()) {
Serial.println("Port One is listening!");
}else{
Serial.println("Port One is not listening!");
}

if (portTwo.isListening()) {
Serial.println("Port Two is listening!");
}else{
Serial.println("Port Two is not listening!");
}

}

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