A LoRa air quality sensor powered with an indoor solar pannel.
This PCB uses:
- as MCU: STM32L412C8
- for LoRa communication: RFM95
- for energy harvesting: SPV1050
- any 18650 lithium cell (could be recycled from old laptop battery)
- as solar pannel, one or two: LL200-4.8-37
- for CO2 sensing: SCD41
- for temperature and humidity: either SCD41 or SHTC3
Warning this project is still work in progress, PCB may still contain errors.
PCB V1.0 preview:
- Write some basic testing firmware
- Evaluate energy balance
- Optimize energy usage
- CC-BY-SA