dtx1.ino

// data transmitter sketch//
//
#include <VirtualWire.h>

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

// we'll send the value of analog pin 1
const int Sensor1Pin = A1;

int Sensor1Data;
char Sensor1CharMsg[4];

void setup() 
{
  pinMode(ledPin, OUTPUT);
  pinMode(A1, INPUT);
  vw_setup(2000); // data speed in bps
  vw_set_tx_pin(12); //digital pin to data transmitter
}

void loop() 
{
  // get data from analog pin 1
  Sensor1Data = analogRead(Sensor1Pin);

  // convert data from integer to character array
  itoa(Sensor1Data, Sensor1CharMsg, 10);

  digitalWrite(13, true); // onboard LED on to indicate transmitting
  vw_send((uint8_t *)Sensor1CharMsg, strlen(Sensor1CharMsg)); // send array
  vw_wait_tx(); // wait until data is sent
  digitalWrite(13, false); // onboard LED off to indicate finished transmitting
  delay(1000); // wait

}