Hello Clemens and other guys,
Clemens, I have some questions for you if you can answer please.
I am working on Arduino based bee scale project and I am experiencing some problems with ADC and GSM module interference.
I am using shielded HX711 breakout board and SIM800L module. Everything works ok till SIM800L module starts to communicates with network. When GSM module receives SMS or voice call ADC data become corrupt so weight is not correct. All is powered from 3.7V 4000mAh Li battery. I've tried to power GSM module from other battery but problem still persist. It looks like interference comes from RF side.
I have made dual side PCB (photo attached) with separate ground planes and decoupling for analog, digital and GSM sections but again problem persist. ADC reading is averaged in firmware but it does not helped a lot.
I do not know what else to try.
What about your experience about GSM module and bee hive weight scale?
Sorry for my bad English. :-[