I will try tomorrow to do it without any voltage regulators together with a sensebender micro. I have the bigger pir sensor though, but I dont think its much difference on thoose. We will see.

hmm think i solved the problem. I tried with an arduino uno instead and now the sketch works fine. Very strange :(

@AWI Yes i am. but there is mistake in the picture the R3 is connected between Pin 3 and VCC, not ground (pull up resistor). Then that leaves me hanging a bit because that is way more than I will be comfortable with in terms off battery changes. Any suggestion what to do?

I am facing similar issue, gateway not reachable after a power outage. Have to manually reset the arduino. Please help

@TommySharp Very nice, hope you realize you have started on a long journey :-) But try to modify the original sketch, it works really well and will save you a lot of work.

@moskovskiy82 I certainly agree, I assume your comment actually was meant to Ispandy ;-)