Ok, finally it's solved. I installed everything from scratch. Then installed your sandeep lib from your github. And finally added the LEDs and Buttons to the variants.h. That compiled successfully. And my problem was that the sensor is sleeping and I couldn'T get a heartbeat answered.
So everything is clear and now testing...
Hey! This looks like a great project! I'm considering building one for my hives.
I notice that the legs need to be welded. That will be a chore for people that want to make this build themselves.
Is this version designed to be built by anyone?
Did you consider using open source or standardized hardware? Think of 2020 alu profiles or something, to allow reasonable buildability for users other than beep-base-shop.
Also let me know if I misjudged, and that all components could be simply bought online.