@mardah oh... you mean pin change system, not extint. You can use it of course.

@GertSanders ok, strange. standard pin headers fit for me only into FTDI and ICSP pin holes. Into the other two 8 pin rows it does not fit.

@scalz I have just updated to MySensors 2.3.2 and the sketch with interrupts stopped working. Any changes in any lib?

@JahFyahh - I still haven't managed to et round to it. I've been really busy since this project and its still hectic here. I'm sure i read a few reviews somewhere, here or google. Not sure.