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 ...

The ESP8266 most people are getting from China ... By next week, someone will have a video of this module connected to a battery, with a web-enabled blinking LED. Of course that’s not the ...