Empfänger

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

#define CE_PIN   9
#define CSN_PIN 10
const uint64_t pipe = 0xE8E8F0F0E1LL;
RF24 radio(CE_PIN, CSN_PIN);
int entfernung[1];

LiquidCrystal lcd(7, 6, 5, 4, 3, 2);

void setup() {
  lcd.begin(16, 2);
  Serial.begin(9600);
  delay(1000);
  radio.begin();
  radio.openReadingPipe(1,pipe);
  radio.startListening();;
}

void loop()
{
  if ( radio.available() )
  {
    bool done = false;
    while (!done)
    {
      done = radio.read( entfernung, sizeof(entfernung) );
      Serial.print("Entfernung = ");
      Serial.print(entfernung[1]);
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("Entfernung = ");
      lcd.print(entfernung[1]);
      delay(1000);

    }
  }
      else
      {
      Serial.println("Kein Signal vorhanden");
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("Kein Signal");
      lcd.setCursor(0, 1);
      lcd.print("vorhanden!");
      delay(1000);
      }
    }