This smart plug has an ESP32 microcontroller in it. Using 200 lines of Toit code and libraries for NTP, HTTPS, JSON, etc., it fetches the current electricity pr

This smart plug has an ESP32 microcontroller in it. Using 200 lines of Toit code and libraries for NTP, HTTPS, JSON, etc., it fetches the current electricity price from a free online service and uses it to switch on a lava lamp only when the electricity is green and cheap. There's a manual override.