nRF24l01, Arduino and Pi - delay

Projects Programming
3

I've modified the code as shown below, but it doesn't help. Still the same problem.

  unsigned long currentMillis = millis();
    if(currentMillis - previousMillis > interval)
    {
      previousMillis = currentMillis;
      if(radio.write(msg, sizeof(int)))
      {
          Serial.println(msg[0]); 
      }
      else
      {
          Serial.println("Failed!"); 
      }       
    }