receiver

#include <VirtualWire.h>
const int led_pin = 13;
const int receive_pin = 12;

void setup()
{
    Serial.begin(9600);
    Serial.println("Connecting . . . ");
    delay(1000);
    vw_set_rx_pin(receive_pin);
    vw_set_ptt_inverted(true); // Required for DR3100
    vw_setup(2000);  // Bits per sec
    vw_rx_start();       // Start the receiver PLL running
    pinMode(led_pin, OUTPUT);
}
void loop()
{
    uint8_t buf[VW_MAX_MESSAGE_LEN];
    uint8_t buflen = VW_MAX_MESSAGE_LEN;

if (vw_get_message(buf, &buflen)) // Non-blocking
{ int i;
// lampu akan menyala ketika menerima pesan
digitalWrite(led_pin, HIGH);
// pesan ketika menerima data dari TX
                Serial.print("Received: ");
                for (i = 0; i < buflen; i++)                {
                    //menampilkan pesan dalam bentuk karakter
                    Serial.print((char)buf[i]);
                    Serial.print(' ');              }
                    Serial.println();
      digitalWrite(led_pin, LOW);   }}