It's a weather display powered by a wifi-enabled ESP32 microcontroller and a 7.5-inch e-paper (aka e-ink) display. Current and forecast weather data are obtained from the OpenWeatherMap API. Sensors provide the display with accurate indoor temperature and humidity.
The project consumes approximately 14μA while sleeping and is estimated to consume an average of approximately 83mA during wake periods of approximately 10 seconds. The display can be configured to update as frequently as necessary. When the refresh interval is set to 30 minutes, the device can run for more than 6 months on a single 5000mAh battery. The item displays an accurate battery life percentage and can be charged via a USB-C cable connected to a wall adapter or computer.
