https://openenergymonitor.org/

This project is hardcore! #OpenSource, #hardware, #firmware and #software. You can buy pre-flashed hardware.

The catch? It's not clear what components to buy or why, and the setup process is so difficult, it's effectively your new hobby.

I expect it'll get better as out gets more popular and more people contribute to the documentation.

#electronics #diy #OpenHardware #FOSS