UART code

//transmitter code (software)
#include <SoftwareSerial.h>

SoftwareSerial gtSerial(2, 3); // Arduino RX, Arduino TX

void setup()
{
  Serial.begin(9600);    // serial / USB port
  gtSerial.begin(9600);  // software serial port
}

byte rx_byte = 1;        // byte used to transmit 1 byte of code of '1'

void loop()
{
  gtSerial.write(rx_byte);
  Serial.println(rx_byte); //though redundant, checks value
}



//receiver code (software)
#include <SoftwareSerial.h>

SoftwareSerial gtSerial(2, 3); // Arduino RX, Arduino TX

int LED = 6;  //LED on Arduino board

void setup()
{
  pinMode(LED, OUTPUT);
  Serial.begin(9600);    // serial / USB port
  gtSerial.begin(9600);  // software serial port
}

byte rx_byte = 0;        // stores received byte

void loop()
{
  rx_byte = gtSerial.read();
  Serial.println(rx_byte);
  (rx_byte==1)?(digitalWrite(LED, HIGH)):(digitalWrite(LED, LOW))//desired output
}