Battery Powered ESP8266 IoT - Door Sensor - Home Circuits
I made an ESP-01 temperature sensor that sends data to Home Assistant via MQTT. Based on a prototype using a smaller battery I'm hoping it will last 4+ months. : r/esp8266
IoT based Battery Monitoring System using NodeMCU and ThingSpeak
Battery Status Monitoring System using ESP8266 & Arduino IoT Cloud
ESP8266: Monitoring Power Consumption • ThingPulse
Battery powered #esp8266 logging its battery voltage : r/esp8266
IoT based Battery Monitoring System using NodeMCU and ThingSpeak