#include "RF24.h"
#include "printf.h"

RF24 radio(9, 10);

uint8_t addrWR[5] = {};
uint8_t addrDTU[5] = {0x32, 0x88, 0x81, 0x72, 0x01};  

uint8_t data[32];
uint8_t receive_payload[32];
uint8_t datalen = 0;

void dump(char * was, uint8_t * data, int len) {
//==============================================
  Serial.print (was);
  for (byte i = 0; i < len; i++) {
    Serial.print(data[i], HEX);  Serial.print(' ');
  }
  Serial.println();
}

void tele7 () {
//=============
  memset (data, 0, 32);
  data[0] = 0x07;
  data[10] = 0x07;
  datalen = 11;  
}


void setup(void){
  Serial.begin(9600);
  printf_begin();
  radio.begin();
  radio.setAutoAck( false);
  radio.setPALevel(RF24_PA_MAX);
  radio.setChannel (3);
  radio.setDataRate (RF24_250KBPS);
  radio.openWritingPipe(addrDTU);    
  radio.openReadingPipe(1, addrDTU); // using pipe 1
  //radio.enableDynamicPayloads();
  //radio.enableDynamicAck();
  radio.setCRCLength(1);
  // Get into standby mode
  radio.startListening();
  radio.stopListening();
  radio.printDetails();

}

boolean send() {
  radio.stopListening();  
  return radio.write(data, datalen);
}

uint8_t receive () {
  uint8_t pipe;
  radio.startListening();
  if (radio.available(&pipe)) {             // is there a payload? get the pipe number that recieved it
    uint8_t bytes = radio.getPayloadSize(); // get the size of the payload
    radio.read (receive_payload, bytes);            // fetch payload from FIFO
    Serial.print(F("gelesen "));
    Serial.print(bytes);                    // print the size of the payload
    Serial.print(F(" bytes auf Pipe "));
    Serial.print(pipe);                     // print the pipe number
    return bytes;
  }
  return 0;
}   


boolean replied = false;

uint8_t step = 1;

void loop() {
//=========
  if (replied) return; 
  if (step == 1) {
    tele7 ();
    dump ("send: ", data, datalen);
    if (!send())
      Serial.println("Senden fehlg.");
    else {
      delay(1000);
      memset (receive_payload, 0, sizeof(receive_payload));
      datalen = receive ();
      if (datalen)
        dump ("empf.:", receive_payload, datalen);
      else
        Serial.println ("keine Antwort vom WR!");
    }
  }
  delay(1000);
}