#include <SoftwareSerial.h>

​

#define MYPORT_TX 12

#define MYPORT_RX 13

​

SoftwareSerial myPort;

​

[...]

​

Serial.begin(115200); // Standard hardware serial port

​

myPort.begin(38400, SWSERIAL_8N1, MYPORT_RX, MYPORT_TX, false);

if (!myPort) { // If the object did not initialize, then its configuration is invalid

  Serial.println("Invalid SoftwareSerial pin configuration, check config"); 

  while (1) { // Don't continue with invalid configuration

    delay (1000);

  }

} 

​

[...]