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Помогите, пожалуйста, разобраться со скетчем.

Пытаюсь завести вместе ethernet enc28j60 и adafruit pn532. NFC секция работает нормально, ID карточек читается, а вот сеть становится доступна только, когда карточку прикладываю.

#include <EtherCard.h>
#include <Wire.h>
#include <SPI.h>
#include <Adafruit_PN532.h>

#define PN532_IRQ   (2)
#define PN532_RESET (3)
Adafruit_PN532 nfc(PN532_IRQ, PN532_RESET);

static byte myip[] = { 192, 168, 2, 15 };
static byte gwip[] = { 192, 168, 2, 1 };
static byte mymac[] = { 0x74, 0x69, 0x69, 0x2D, 0x30, 0x31 };

int ledPin = 6;

byte Ethernet::buffer[300];

BufferFiller bfill;

const char page[] PROGMEM =
"\r\n"
"Main page"
;

const char cmd_on[]  PROGMEM =
"\r\n"
"Received ON command"
;

const char cmd_off[] PROGMEM =
"\r\n" 
"Received OFF command"
;

void setup() {
  
  pinMode(ledPin, OUTPUT);

  Serial.begin(115200);
  Serial.println("Hola caracola!");

  if (!ether.begin(sizeof Ethernet::buffer, mymac, 10))
  {
    Serial.println( "Failed to access Ethernet controller");
    while(1);
  }
  else
    Serial.println("Ethernet controller initialized");

  ether.staticSetup(myip, gwip);
  ether.printIp("IP:  ", ether.myip);
  ether.printIp("GW:  ", ether.gwip); 
  
  nfc.begin();

  uint32_t versiondata = nfc.getFirmwareVersion();
  if (! versiondata) {
    Serial.print("Didn't find PN53x board");
    while (1);
  }
  
  Serial.print("Found chip PN5"); Serial.println((versiondata>>24) & 0xFF, HEX); 
  Serial.print("Firmware ver. "); Serial.print((versiondata>>16) & 0xFF, DEC); 
  Serial.print('.'); Serial.println((versiondata>>8) & 0xFF, DEC);
  
  nfc.SAMConfig();
  
  Serial.println("Waiting for an ISO14443A Card ..."); 
}

void loop() {

  uint8_t success;
  uint8_t uid[] = { 0, 0, 0, 0, 0, 0, 0 };
  uint8_t uidLength;  
  
  word pos = ether.packetLoop(ether.packetReceive());

  if (nfc.readPassiveTargetID(PN532_MIFARE_ISO14443A, uid, &uidLength)) {
    Serial.print("  UID Value: ");
    nfc.PrintHex(uid, uidLength);      
  }
     
  if (pos) { 
    bfill = ether.tcpOffset();
    char* data = (char *) Ethernet::buffer + pos;
    Serial.println(data);

    if (strstr((char *)Ethernet::buffer + pos, "GET /?on") != 0) {
      Serial.println("Received ON command");
      digitalWrite(ledPin, HIGH);
      bfill.emit_p(cmd_on);
    }
    else if (strstr((char *)Ethernet::buffer + pos, "GET /?off") != 0) {
      Serial.println("Received OFF command");
      digitalWrite(ledPin, LOW);
      bfill.emit_p(cmd_off);
    }
    else
      bfill.emit_p(page);
      ether.httpServerReply(bfill.position());
  }
}