Arduino Ethernet PoE

Development Tools IDE 1.x
1

Hello everyone,

I´m using a Arduino Ethernet Board R3(no shield ) with PoE.

If I plug in the Arduino to a PoE-Switch(Allnet All8894WMP), the ethernet chip sometimes works, sometimes do nothing.
The Atmel always start ups(blink Sketch for Pin8).

When the ethernet chip does not work, the TX-LED on the Arduino board blinks approximately 10 times with ( ~10Hz)
and then for 500ms off.

When I now click on the RST-Button the ethernet chip start up.

Do anyone know the problem, or is it possible to read out the activity of the ethernet chip?

kind regards,
Sebastian

#include <SPI.h>
#include <Ethernet.h>
#include <EthernetUdp.h>

//***********************************************************
//                       Defines                           //
#define ledPin 8
#define TIMER_PRELOAD_40HZ 63972


//*********************************************************//
//                  Globale Variablen                      //
byte mac[] = { 0x90, 0xA2, 0xDA, 0x0F, 0x8F, 0xE8 };
IPAddress ip(192, 168, 1, 105);
IPAddress BroadcastIP(255, 255, 255, 255);

unsigned int localPort = 8000;      // local port to listen on

EthernetUDP Udp;

//*********************************************************//
//                         Init                            //
void setup()
{
  pinMode(ledPin, OUTPUT);
  timer1Init();
  

  Ethernet.begin(mac,ip);
  Udp.begin(localPort);
}

//*********************************************************//
//                         MainLoop                        //
void loop()
{
  Udp.beginPacket(BroadcastIP, localPort );
  Udp.write("hello");
  Udp.endPacket();
  delay(1000);
}