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

// ZA TESTIRANJE Uno RECEIVE

RF24 radio(2, 7); // (9, 10); // CE, CSN 
const byte address[6] = "00001";
boolean button_state = 0;
int led = 3;
int sig = 4;
String dane = "";

void setup() {
pinMode(led, OUTPUT);
pinMode(sig, OUTPUT);
Serial.begin(9600);
radio.begin();
radio.openReadingPipe(0, address);   //Setting the address at which we will receive the data
radio.setPALevel(RF24_PA_MIN);       //You can set this as minimum or maximum depending on the distance between the transmitter and receiver.
radio.startListening();              //This sets the module as receiver
}
void loop()
{
if (radio.available())              //Looking for the data.
{
  char text[1] = "";                 //Saving the incoming data
  radio.read(&text, sizeof(text));    //Reading the data
  dane = String(text[0]);
  Serial.println(dane);
  if(dane == "C")
  {
  digitalWrite(led, HIGH); 
  delay(250); 
  digitalWrite(led, LOW);
  delay(250);  
  }
  if(dane == "Z")
  {
  digitalWrite(sig, HIGH); 
  delay(250); 
  digitalWrite(sig, LOW);
  delay(250);  
  }  
}
} 

--------------------------------------------------------------

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

// ZA TESTIRANJE Uno SEND

RF24 radio(2, 7); // (9, 10); // CE, CSN         
const byte address[6] = "00001";     //Byte of array representing the address. This is the address where we will send the data. This should be same on the receiving side.
int button_pin0 = 0;
int button_pin = 1;
boolean button_state0 = 0;
boolean button_state = 0;
void setup() {
pinMode(button_pin0, INPUT);
pinMode(button_pin, INPUT);
radio.begin();                  //Starting the Wireless communication
radio.openWritingPipe(address); //Setting the address where we will send the data
radio.setPALevel(RF24_PA_MAX);  //You can set it as minimum or maximum depending on the distance between the transmitter and receiver.
radio.stopListening();          //This sets the module as transmitter
}
void loop()
{
button_state0 = digitalRead(button_pin0);
button_state = digitalRead(button_pin);
if(button_state == LOW)
{
const char text[] = "Z";
radio.write(&text, sizeof(text));                  //Sending the message to receiver
}
if(button_state0 == LOW)
{
const char text[] = "C";
radio.write(&text, sizeof(text));                  //Sending the message to receiver
}
/*else
{
const char text[] = "D";
radio.write(&text, sizeof(text));                  //Sending the message to receiver 
}
//radio.write(&button_state, sizeof(button_state));  //Sending the message to receiver 
*/
delay(500);

}