I've been a little busy at work and with family recently. This led into an unintended testing period of the software and hardware. I'm happy to say that the system is working now for 25 day without any problems. Groups, zones, sensors are doing what they should. The communication with wired and wireless modules is working. GSM modem is sending SMS, LAN is responding and sending data through MQTT. All is just working. Big success for me!

This brings me to an idea, does anyone want to have PCB for this project? Let me know, I have some spare ones, and will send them to you for 6-8 EUR (10$), depending on your location.

A copy is also on blog: http://openhomesecurity.blogspot.cz/2015/03/test-run-stability.html