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Esp8266 Esp-32 18650 Battery Shield Wifi Bluetooth Dht11 Cp2104 Temperature Humidity Soil Moisture Sensor Module For Arduino - Integrated Circuits - AliExpress
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DIY: Cheap wifi-based temperature/humidity sensor based on ESP8266 & DHT22 - Home Automation - openHAB Community
![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 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](https://i.redd.it/d2zrxivm5gt21.jpg)
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
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