Get the number of bytes (characters) available for reading from a software serial port. This is data that's already arrived and stored in the serial receive buffer.

mySerial.available()

none

the number of bytes available to read

// include the SoftwareSerial library so you can use its functions:
#include <SoftwareSerial.h>
 
#define rxPin 2
#define txPin 3
 
// set up a new serial port
SoftwareSerial mySerial =  SoftwareSerial(rxPin, txPin);
 
void setup()  {
  // define pin modes for tx, rx:
  pinMode(rxPin, INPUT);
  pinMode(txPin, OUTPUT);
  // set the data rate for the SoftwareSerial port
  mySerial.begin(9600);
}
 
void loop() {
  if (mySerial.available()>0){
  mySerial.read();
 }
}

• SoftwareSerial()
• read()
• print()
• println()

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