NRF24L01 - SLAVE

// SimpleRx - the slave or the receiver

#include <SPI.h>
#include <nRF24L01.h>
#include <RF24.h>

#define CE_PIN   9
#define CSN_PIN 10

const byte slaveAddress[][5]= {{'R', 'x', 'A', 'A', 'A'}, {'R', 'x', 'A', 'A', 'B'},
  {'R', 'x', 'A', 'A', 'C'}, {'R', 'x', 'A', 'A', 'D'}};

RF24 radio(CE_PIN, CSN_PIN);

char dataReceived[10]; // this must match dataToSend in the TX
bool newData = false;

//===========

void setup() {

    Serial.begin(9600);

    Serial.println("SimpleRx Starting");
    radio.begin();
    radio.setDataRate(RF24_250KBPS);
    radio.openReadingPipe(1,slaveAddress[1]);
    radio.enableDynamicPayloads() ;
    radio.setAutoAck(false);
    radio.startListening();
}

//=============

void loop() {
    getData();
    showData();
}

//==============

void getData() {
    if ( radio.available() ) {
        radio.read( &dataReceived, sizeof(dataReceived) );
        newData = true;
    }
}

void showData() {
    if (newData == true) {
        Serial.print("Data received ");
        Serial.println(dataReceived);
        newData = false;
    }
}