![I recently finished the prototype for a battery powered ESP8266 based temperature and humidity sensor with eInk display. Currently working on a custom PCB. : r/arduino I recently finished the prototype for a battery powered ESP8266 based temperature and humidity sensor with eInk display. Currently working on a custom PCB. : r/arduino](https://i.redd.it/q0c5386r08p61.jpg)
I recently finished the prototype for a battery powered ESP8266 based temperature and humidity sensor with eInk display. Currently working on a custom PCB. : r/arduino
![ESP8266 - Li-Ion Battery Rechargeable Battery Power Solution : 4 Steps (with Pictures) - Instructables ESP8266 - Li-Ion Battery Rechargeable Battery Power Solution : 4 Steps (with Pictures) - Instructables](https://content.instructables.com/F7X/CECJ/I8BGIARY/F7XCECJI8BGIARY.jpg?auto=webp&fit=bounds&frame=1)
ESP8266 - Li-Ion Battery Rechargeable Battery Power Solution : 4 Steps (with Pictures) - Instructables
![diymore WeMos Mini D1 ESP8266 WiFi Wireless NodeMcu Module Development Board 18650 Battery Case Esp-Wroom-02 for Arduino - AliExpress diymore WeMos Mini D1 ESP8266 WiFi Wireless NodeMcu Module Development Board 18650 Battery Case Esp-Wroom-02 for Arduino - AliExpress](https://ae01.alicdn.com/kf/HTB1jB8rS5rpK1RjSZFhq6xSdXXai/diymore-WeMos-Mini-D1-ESP8266-WiFi-Wireless-NodeMcu-Module-Development-Board-18650-Battery-Case-Esp-Wroom.jpg)