Remote control receiver sketch

remoterx.ino

// receiver sketch
//
// https://pmdway.com/blogs/product-guides-for-arduino/tutorial-using-long-range-315mhz-rf-wireless-transceivers-with-arduino
//
#include <VirtualWire.h>
uint8_t buf[VW_MAX_MESSAGE_LEN];
uint8_t buflen = VW_MAX_MESSAGE_LEN;
void setup()
{
  vw_set_ptt_inverted(true); // Required for RF link modules
  vw_setup(300);
  vw_set_rx_pin(11);
  vw_rx_start();
  pinMode(3, OUTPUT);
  pinMode(2, OUTPUT);
}
void loop()
{
  if (vw_get_message(buf, &buflen))
  {
    switch(buf[0])
    {
    case 'a':
      digitalWrite(2, HIGH);
      break;
    case 'b':
      digitalWrite(2, LOW);
      break;
    case 'c':
      digitalWrite(3, HIGH);
      break;
    case 'd':
      digitalWrite(3, LOW);
      break;
    }
  }
}