(Chinese). An ESP8266 sits as the main controller, with an additional MQTT control option, where the whole unit is powered over a USB-C connection. On board PCB traces, in the shape of a Hilbert ...

At this point, we’ve all seen enough ESP8266 “weather stations” to know ... For extra hacker points, the board was even produced at home on a PCB mill. In addition to the ESP-7 or 12 module ...