@gohan Can't, as I said I don't know from which of multiple shipments it came. Only noticed when I used it.

Ok, my setup is running now (including personalization, encryption, and soft signing) and stuff is published to mqtt. Thanks everyone for the help! I really like this community. Now I need to resolve the issue with the OpenHAB binding but that's no topic for here.

@elcaron I do not have the necessary hardware (or the time) I am afraid. I hope the community can help.

Problem solved with pull-up! Thanks!

No, not yet. You have to press the update button when you push new/updated files to your github project.

Quick followup: After I started looking for them, i saw quite a few traces like this. A lot of them put rows of vias in the groundplane along the trace. I see that this would change the impedance taken from the calculator if they are close (since there is more ground around), but should there be any closeby connection between top and bottom ground? At the beginning and/or end, e.g.?

Answer to myself: There is one from Sparkfun.

RFm69 irq is needed by the driver in RX mode, sure, but not only. It is used in different mode, TX send for example. So IRQ signal need to be wired.

I did, I just needed the dimensions of the module for the antenna placement ;) Just measured mine though

@mtiutiu For me, D doesn't do anything at all. m acts as set in the dialog.

@MiKa If you happen to have time, could you test the range with a stable 2.7V supply and a 1mF cap in parallel to the battery? I am really not happy with the HT7333 solution, since the shelf life of the keyfob will be limited and the quite expensive LIR2032 can easily be damaged by undervoltage. If the second test works, I could fit 4 220uF 6.3V tantalums next to the LED. Else I would give the step-up thing another go. There are low profile inductors, but I didn't find any for cheap (shipping) at Aliexpress.