Forget what I said. I should have read the thread from the beginning, my bad. In the first page of the thread : Poloalexis found the european patent 1160752B1 from Delta Dore where everything is described about the signal : It's actually Biphase-M and not Biphase-S (not that it matters, there're ...

@sev2000 The reason I chose to split the frame the way I did was because of the end of frame I got with every frame I captured (the red square in the following image) : http://offsec.online.fr/x2d/weird_end_of_frame.png Do you have that too ? I originally assumed these bits must be part of the end ...

Just note that both posts are wrong in the sense that the bit sequence is not truncated at the correct place and some bits should shifted. Well, I only have 1 transmitter and 1 receiver, no zone, just basic on/off of the central heating, so it is entirely possible that I got the splitting wrong ...

Hi sev2000, For the same reasons as you, I also ended up reversing the X2D protocol and came up with similar results I didn't ended reverse engineering Il y a un "up" après "I ended", ce qui signifie, "j'ai fini par" (dans le sens "je me suis résolu à"). But in fact, you're right, I actually stopped ...

Finally, I can operate my home heater using a RfCat device. I don't know how, but I initially messed up the clock rate computation. It is actually 4870Hz. With the proper clock rate, I no longer have any issues with additional zeroes and every received frame is decoded smoothly. I've updated my ...

Well, I think I move from the SDR to the CC1111 to soon because I have clock rate synchronization problems with the CC (which I don't have with the SDR). I definitely had too many 0's in my frames... I will update my draft as soon as I have new findings.

KR,
Jonathan.

Hi guys, For the same reasons as you, I also ended up reversing the X2D protocol and came up with similar results except that I don't seem to have a CRC in my frames. This is maybe because my remote controller model is quite old, 2008 at least. Anyway, here is a draft of my findings, maybe it will ...