Mysensors RFM69W multisensor node(CR123)

Description:

This is a Mysensors node using RFM69W radio module, I2C based temperature/humidity sensors(as external module) and A3212 or equivalent hall effect sensors.

Key Features:

• Si7021 temperature/humidity sensor(as a separate module bought from Aliexpress)
• A3212 hall efect sensor support
• DIP switch for setting node ID statically
• MySensors ready(Atmega328p + RFM69W)
• DC-DC boost converter(L6920 based) - can be bypassed if desired using the SMD jumpers on the board
• Small board(48 x 22mm) using a CR123 battery

Work progress:

1. Test/verify the pcb board correctness(from both electrical and mechanical point of views) - DONE
2. Produce the initial PCB's using some external PCB manufacturer - DONE
3. Components assembly(soldering) - DONE
4. Upload Mysensors temperature/humidity node sketch code - DONE
5. Verify the real board with running code - DONE
6. Code optimizations for low power operation - DONE
7. Create project enclosure using a 3D printer - DONE

Note:

This module has been in production for about 2 months now and it's working stable. This is my first stable node created and I didn't provided any other features as signing support and SPI flash for OTA - so please bear this in mind. This is the final version of it and I won't invest any time/money or other resources to upgrade it. The project is open hardware anyway so anyone can do that if he/she wants.

I will upload more pictures of the finished product and add BOM when I have the time.

Credits:

All credits go to MySensors team for the great work and to the opensource community