Weathergotchi - an E-Paper Climate Logger About This project is an open-source, battery-powered temperature and humidity data logger with an always-on e-paper display. It records ambient conditions over time, stores readings in non-volatile memory, and displays current data along with a history graph. The device is designed for low power consumption, over 1 week of operation on a small Li‑Po battery. Key features: ESP32-S3 with deep sleep & RTC timer to wake up Temperature and humidity sensor with external EEPROM for logging Accurate battery monitoring and charging management Power button controller to turn on/off 1.54‑inch e‑paper display Custom PCB & 3D‑printed case The entire project is open source, including hardware schematics, PCB layout, firmware, and enclosure CAD files. A detailed build video is available on YouTube: E-Paper Climate Logger .…