# Weathergotchi, an open-source climate Tamagotchi

_Wednesday, July 15, 2026 at 8:00 AM EDT · AI · Latest · Tier 2 — Notable_

![Weathergotchi, an open-source climate Tamagotchi — Primary](https://opengraph.githubassets.com/4c34c55d43a86e58ba9b75f630eb745d749f04eacad88f7a82f526aa6a5f0aa5/Michael-Manning/E-Paper-Climate-Logger)

An open-source hardware project called the E-Paper Climate Logger provides a battery-powered temperature and humidity data logger with an always-on e-paper display, according to project documentation. The device records ambient conditions over time, stores readings in non-volatile memory, and displays current data along with a history graph. It is designed for low power consumption, achieving over one week of operation on a small lithium-polymer battery. Key hardware includes an ESP32-S3 microcontroller with deep sleep and a real-time clock timer, a temperature and humidity sensor with external EEPROM for logging, accurate battery monitoring, a power button controller, and a 1.54-inch e-paper display. The project uses a custom printed circuit board and a 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. The firmware is a PlatformIO project for the ESP32-S3 using the Arduino framework. It handles sensor reading, timekeeping, data logging to EEPROM, e-paper display updates, button handling, and power management. Known issues include inaccurate battery state-of-charge reporting, potential unrecoverable low-battery states, temperature reading skew from ESP32 heat during handling, and e-paper display limitations below freezing. The device does not include wireless connectivity to maximize battery life.

## Sources

- [github.com](https://github.com/Michael-Manning/E-Paper-Climate-Logger)

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Retrieved: 2026-07-15T23:22:15.262Z
Publisher: Tech & Business (techandbusiness.org)