Receiver For Arduino.

node-receiver.cpp

#include <SPI.h>
#include "RF24.h"

/*************  USER Configuration *****************************/
// Hardware configuration
RF24 radio(9, 10); // Set up nRF24L01 radio on SPI bus plus pins 7 & 8

/***************************************************************/

const uint64_t pipes[2] = { 0xABCDABCD71LL, 0x544d52687CLL }; // Radio pipe addresses for the 2 nodes to communicate.

char data[32]; //Data buffer for testing data transfer speeds

void sendCallback() {
    Serial.println("Stop Listening.");
    delay(100);
    radio.stopListening();
    radio.write(&data,32);
    Serial.println("Send Response.");

    radio.startListening();
}

void setup(void)
{

    Serial.begin(57600);

    radio.begin();
    radio.setChannel(1);
    radio.setPALevel(RF24_PA_MIN);
    radio.setDataRate(RF24_250KBPS);
    //radio.setAutoAck(1);
    radio.setRetries(15, 15);
    radio.setCRCLength(RF24_CRC_16); // Use 8-bit CRC for performance

    radio.openWritingPipe(pipes[1]);
    radio.openReadingPipe(1, pipes[0]);

    radio.startListening(); // Start listening
    radio.printDetails(); // Dump the configuration of the rf unit for debugging

    radio.powerUp(); //Power up the radio
}

void loop(void)
{

    if (radio.available()) {
      while (radio.available()) {
          radio.read(&data, 32);
          Serial.print("Received:");
          Serial.println(data);

          sendCallback();

          delay(10);
      }
    }
}