an ESP8266-based live power meter. The power meter itself is battery-powered via a 600 mAh battery and monitors an e-paper module, which also displays information about power consumption.

[Richard] built a board with a temperature sensor and an ESP8266 module to report the temperature ... between updates to reduce waste heat and power consumption. He should be doing this anyway ...

Basically, is an early prototype of a low-cost affordable fitness power meter for cyclists (using "an ESP8266 WiFi module, 4 strain gauges in Wheatsone arrangement measured by HX711… ...