Esp8266 Esp-32 18650 Battery Shield Wifi Bluetooth Dht11 Cp2104 Temperature Humidity Soil Moisture Sensor Module For Arduino - Integrated Circuits - AliExpress
One ESP8266, One Battery, One Year… And Counting. | Hackaday
Battery Powered ESP8266 IoT - Temperature Sensor - Home Circuits
I successfully run DHT22 battery ESP8266 temperature/humidity IoT sensor so my next project is a simple IoT Door Sensor. It is up and running … | Iot, Sensor, Power
Adventures in deep sleep with ESP8266 and a temperature sensor – Tomas McGuinness
Amazon.com: ESP8266 NodeMCU ESP-01 ESP-01S WiFi Development Board DS18B20 Temperature Humidity Sensor WiFi Wireless Node Module(Wireless Node Module) : Electronics
Battery Powered ESP8266 WiFi Temperature and Humidity Logger
Adventures in deep sleep with ESP8266 and a temperature sensor – Tomas McGuinness
Design your own ESP Board for Battery Powered IoT Applications