Ethernet gateway and inclusion button not working

[TheoL]

So I've finally had the time, to build an Ethernet gateway. I just the Arduino Ethernet shield. I had an official Arduino laying around do nothing.

Now everything works okay, except for the inclusion button. It's connected to pin 3. I measured the switch which works okay. According to the sketch it should print some debug info when pressed. But I don't see anything in the serial monitor. The led's are working okay. So I'm wondering if I missed a configuration setting.

No I don't need the button at the moment. Because Domoticz doesn't support it. But I'm planning on making a wooden case so that it looks good in our living room. It's either that or removing the gateway to the basement

Also another Domoticz specific question. What is the best migration plan, when going from a serial to a ethernet gateway? For sensors it isn't a back problem I can replace them with the ethernet variant. But for switches and lamps it looks like I have to check every scene and lua script that uses them.

Help is greatly appreciated.