Makezurich Grid Challenge
Caution: The board has to be powered by an external power supply while programming by FTDI. The power supply has to be good enough to provide the necessary current to the device, both when uploading the code and during regular operation.
https://github.com/rac2030/IoT-conference-badge/wiki/How-to-setup-your-development-environment
Board (ESP32 based): http://rac.su/project/nina-w102-minimal-breakout/