You have an ESP8266 board like the Wemos D1, a Li-Ion battery, you want to build a small battery-powered sensor that wakes up every few minutes to do something, and you don’t want to delve into ...

First the obvious-in-retrospect fail. [Richard] built a board with a temperature sensor and an ESP8266 module to report the temperature to the Interwebs. If you’ve ever put your finger on an ...

whereas that's what the ESP8266 is built around. It's basically designed to give Wi-Fi chops to whatever it's connected to, turning anything into a wireless sensor. For example, I've seen them ...