IOT PowerUP time code
Schematic https://user-images.githubusercontent.com/1180107/37556716-20616fd8-29fa-11e8-9542-c7f0d03da3b5.jpg
Espressif ESP32 Data Sheet https://www.espressif.com/sites/default/files/documentation/esp32-wroom-32_datasheet_en.pdf
Github page for MHEtLive https://github.com/MHEtLive/ESP32-MINI-KIT
User forum https://forum.mhetlive.com/