Say, you’re starting your electronics journey with a few projects in mind. You have an ESP8266 board like the Wemos D1, a Li-Ion battery, you want to build a small battery-powered sensor that ...

If you are a regular Hackaday reader, you’ve probably seen plenty of ESP8266 projects. After all, the inexpensive device is a workhorse for putting a project on WiFi, and it works well.