Data receiver sketch

data-rx.ino

// data receiver sketch
//
//  https://pmdway.com/blogs/product-guides-for-arduino/tutorial-using-long-range-315mhz-rf-wireless-transceivers-with-arduino
//
//

#include <VirtualWire.h>

// use onboard LED for status
const int ledPin = 13;

int Sensor1Data;

// holds data from receiver
char Sensor1CharMsg[4];

void setup() {
  Serial.begin(9600);
  pinMode(ledPin, OUTPUT);
  vw_set_ptt_inverted(true);
  vw_setup(2000);     // data speed in bps
  vw_set_rx_pin(11);  // receiver data pin to digital 11
  vw_rx_start();
}

void loop() {
  uint8_t buf[VW_MAX_MESSAGE_LEN];
  uint8_t buflen = VW_MAX_MESSAGE_LEN;

  if (vw_get_message(buf, &buflen))
  {
    int i;
    // LED on to indicate message coming in
    digitalWrite(13, true);
    for (i = 0; i < buflen; i++)
    {
      // fill array with data from receiver
      Sensor1CharMsg[i] = char(buf[i]);
    }

    // null terminate the char array, indicates the end of the data
    Sensor1CharMsg[buflen] = '\0';

    // convert data in array to a usable integer
    Sensor1Data = atoi(Sensor1CharMsg);
    // send data to serial monitor
    Serial.print("tx analog pin 1 reads: ");
    Serial.println(Sensor1Data);

    // message reception finished, turn off onboard LED
    digitalWrite(13, false);
  }
}