EPD-nRF5

E-paper display calendar firmware with support for Chinese lunar calendar, solar terms, and holiday schedules. It can also transmit images via Bluetooth to the e-paper display for use as a digital photo frame. The calendar interface is adapted for common 4.2-inch and 7.5-inch e-paper resolutions, and the same firmware can drive different screen sizes (screen size and driver can be switched online through the web interface).

Supported MCUs: nrf51822 / nrf51802 / nrf52811 / nrf52810. For e-paper displays, it supports common UC81xx / SSD16xx series drivers (black & white / 3-color / 4-color). It also supports custom pin mapping from the e-paper display to the MCU, sleep/wake functionality (NFC / wireless charger), and Bluetooth OTA firmware updates.

This project includes a web-based interface implemented using Web Bluetooth API. You can use it on your phone or computer by visiting the URL below, or by directly double-clicking html/index.html locally.

🔗 Web Interface ▶️ Demo Video

The web interface supports multiple image dithering algorithms and allows you to doodle on images and add text. In addition to displaying images as a digital photo frame, it can also switch to calendar mode to display monthly calendars, Chinese lunar calendar solar terms, holidays, and work schedule adjustments.

View Documentation →

View Documentation →

This project uses or references code from the following projects:

• ZinggJM/GxEPD2
• waveshareteam/e-Paper
• atc1441/ATC_TLSR_Paper

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