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

RF24 radio(9, 10);
const char id[] = "00:00:02";

int relPin = 8;                 // Pin for driving rel่
boolean rele;

void setup(){ 
  while(!Serial);
  Serial.begin(9600);

  rele = false;
  pinMode(relPin, OUTPUT);  //Sets digital pin 13 as output pin
  digitalWrite(relPin, LOW);
  
  radio.begin();
  radio.setPALevel(RF24_PA_MAX);
  radio.setChannel(0x76);
  radio.openWritingPipe(0xF0F0F0F0E1LL);
  const uint64_t pipe = (0xE8E8F0F0E1LL);
  radio.openReadingPipe(1, pipe);
  radio.enableDynamicPayloads();
  radio.enableDynamicAck();
  radio.powerUp();	

}

void loop(){
  radio.startListening();
  char receivedMessage[32] = {0};
  String str(id);
  if(radio.available()){
    radio.read(receivedMessage, sizeof(receivedMessage));
    radio.stopListening();
    String stringMessage(receivedMessage);   
    if(stringMessage == (str + "t")){            // get device type
       const char type[] = "L";          	// L = Line
       radio.write(type, sizeof(type));  
    } else if(stringMessage == ("i")){    	 // get device ID
       radio.write(id, sizeof(id));   
    } else if(stringMessage == (str + "p")){     // switch the line
       rele=not(rele);   
       if (rele){
         digitalWrite(relPin, HIGH);
       } else {
         digitalWrite(relPin, LOW);
       }
    } else if(stringMessage == (str + "s")){      // get the status
       if (rele){
         radio.write("1", sizeof("1"));  
       } else {
         radio.write("0", sizeof("0")); 
       }     
    } 
  } 
}