4.2 inch Photo Board: Difference between revisions
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|image1=4.2 inch-800-600-1.jpg | |image1=4.2 inch-800-600-1.jpg | ||
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|intro= | |intro=Photo, ESP32, JD79668, SPI | ||
|highlights= | |highlights=1.The 4.2 inch Photo Board(4C) is an open-source 4-color E-Paper development board based on the ESP32-WROOM-32E MCU. It carries an onboard 4.2-inch black / white / red / yellow E-Paper display at 400×300 resolution, suitable for desktop photo frames,dynamic labels, low-power information displays, and similar applications. | ||
2. Designed for makers, educators, and secondary developers, the board integrates a USB-C port, CH340C USB-to-serial bridge, TF card slot, three physical buttons, dual I/O expansion headers, plus the BOOT and RST buttons — flashing and debugging require no extra tools. | |||
3. The companion sketch is built on the Arduino framework and provides a full photo-album manager plus a web configuration UI: upload an image through the browser and the board displays it. Auto-switching follows a configurable timer, with TF card mirror backup and one-click clear-all. | |||
|hardware=The expansion board routes display bus, touch signals, and SD card interface to standard headers. Confirm controller board logic level before use. | |hardware=The expansion board routes display bus, touch signals, and SD card interface to standard headers. Confirm controller board logic level before use. | ||
|usage=[[File:4.2 inch-600-300-4.jpg|center|thumb|600x600px]] | |usage=[[File:4.2 inch-600-300-4.jpg|center|thumb|600x600px]] | ||
Revision as of 16:34, 9 September 2026
ESP32
Introduction
1.The 4.2 inch Photo Board(4C) is an open-source 4-color E-Paper development board based on the ESP32-WROOM-32E MCU. It carries an onboard 4.2-inch black / white / red / yellow E-Paper display at 400×300 resolution, suitable for desktop photo frames,dynamic labels, low-power information displays, and similar applications.
2. Designed for makers, educators, and secondary developers, the board integrates a USB-C port, CH340C USB-to-serial bridge, TF card slot, three physical buttons, dual I/O expansion headers, plus the BOOT and RST buttons — flashing and debugging require no extra tools.
3. The companion sketch is built on the Arduino framework and provides a full photo-album manager plus a web configuration UI: upload an image through the browser and the board displays it. Auto-switching follows a configurable timer, with TF card mirror backup and one-click clear-all.
Specifications
Specifications to be added.
Hardware
The expansion board routes display bus, touch signals, and SD card interface to standard headers. Confirm controller board logic level before use.
Size
FAQ
- What if compilation shows insufficient capacity?
- Reduce font and bitmap resources, or choose a controller with more capacity.
- What if colors are abnormal?
- Check driver model, color order, and initialization orientation settings.
Downloads