Arduino Nano stürzt ab ohne Serial Monitor

#include <RF24Network.h>

#include <RF24.h>

#include <SPI.h>

#include <dht.h>

#include "MyTypes.h"

#include <Narcoleptic.h>

#define DHTPIN 3     // what pin we're connected to

#define DHTTYPE DHT22   // DHT 22  (AM2302)

DHT dht(DHTPIN, DHTTYPE);

// nRF24L01(+) radio attached 

RF24 radio(9,10);

// Network uses that radio

RF24Network network(radio);

// Address of our node

const uint16_t this_node = 1;

// Address of the other node (by default send it to the base)

const uint16_t other_node = 0;

// How often to send 'hello world to the other unit

unsigned long interval = 5000; //ms

// When did we last send?

unsigned long last_sent;

// How many have we sent already

unsigned long packets_sent;

payload_t myData;

// Number of packets we've failed to send since we last sent one

// successfully

uint16_t lost_packets = 0;

void setup(void)

{

  Serial.begin(57600);

  Serial.println("RF24Network/examples/helloworld_tx/");

  SPI.begin();

  radio.begin();

  network.begin(/*channel*/ 90, /*node address*/ this_node);

  dht.begin();

  RF24NetworkHeader header(network.parent(), 'k');

  Serial.print("APP Sending type: k to node:");

  Serial.println(header.to_node);

  if ( ! network.write(header, NULL, 0) )

     Serial.println("failed.");

}

void loop(void)

{

  delay(1000);

  // Pump the network regularly

  network.update();

   // If so, grab it and print it out

  //  RF24NetworkHeader header;

  //  network.peek(header);

  if ( this_node > 0 )

  {        

    float h = dht.readHumidity();

    float t = dht.readTemperature();

    if (isnan(h) || isnan(t)) {

      Serial.println("Failed to read from DHT");

    } 

    else{

       myData.value = h;

       myData.unity[0] = '%';

       myData.lost_packets = lost_packets;

       sendData(&myData);      

       delay(1000);    

       myData.value = t;

       myData.unity[0] = 'C';

       myData.lost_packets = lost_packets;

       sendData(&myData);   

    }  

    //radio.powerDown();

    //radio.powerDown();    

  }            

}

boolean sendData(payload_t* data) {

  unsigned long now = millis();

  if ( now - last_sent >= interval  )

  {

    Serial.println("Sending...");

    last_sent = now;

    boolean ok = false;

    RF24NetworkHeader header(other_node, 'S');

    ok = network.write(header, &myData, sizeof(myData));

    if (!ok) {

      ++lost_packets;

      Serial.println("failed.");      

    }

    return ok;

  }

}