[TJ] set out to create a battery data harvester, and used the ubiquitous ESP8266 to make a fully-featured battery monitor. Measuring battery capacity is pretty straightforward but it does take time.

Posted in Arduino Hacks, Wireless Hacks Tagged arduino, Arduino IDE, ESP, ESP8266, wifi ← In Which Robots Fight The Console Wars Resourceful DIY Brushless Hand-held Camera Gimbal → ...

The Qduino Mini is the first tiny Arduino compatible board that has a built-in battery charger and fuel gauge, watch the video below to learn more from its creator Quin.

It consists of ESP8266-12E, USB C Port USB port for charging and communication, CP2102, Battery Connector, On/Off switch, Flash, PMSA003 sensor selection jumper, BME280 and many more.” ...