A few years ago I bought an alarm system that works with wireless sensors.
Now I have an openHAB installation running to make my house a little smarter.
Unfortunateley the alarm system is a closed system - not able to interact with openHAB.
The old sensors are installed on a lot of doors and windows and of course I like to reuse them instead of buying new ones.
The sensors have "868 FSK" printed on them. More information I do not have.
I have tried a bit more with "Universal Radio Hacker". And now I think I found the right configuration to decode the signal. I read that 600 is a typical baudrate for FSK. So I configured the URH interpretation module to this value (Samples/Symbol) and here we are!
Window sensor 1:
Window sensor 2:
The signal from sensor 1 is decoded to 349B.4934.926D.3492.49A.
The signal from sensor 2 is decoded to 26D2.6BB4.9269.B492.49A.
The next step is to modify the SignalDuino firmware for the nanoCUL, to receive the same signal.
I did a little research what no I can do with AIRSPY to interpret this unknown signal. I read that the signal can be exported to an audio file. This audio file can be imported by Audacity for example. I played a little bit with both tools but I was not really successful.
But then (by accident) I found URH (Universal Radio Hacker) !!!