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'''Documentation notice:''' This technical documentation was independently rewritten from an archived supplier source. Check technical details and commands against the product version and manufacturer documentation before use.<br />
<br />
== Summary ==<br />
The Pico e-Paper 2.9 (B) is a 2.9-inch E-Ink display module for the Raspberry Pi Pico with a resolution of 296×128 pixels and Black/White/Red colors. It is driven via an SPI interface.<br />
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== Related products at JW Tech ==<br />
* [https://shop.jw-tech.eu/p/WSAL19607 WSAL19607 – 2.9inch E-Paper E-Ink Display Module (B) for Raspberry Pi Pico, 296×128, Red / Black / White, SPI]<br />
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== Technical overview ==<br />
* Resolution: 296 × 128 pixels; dot pitch: 0.227 × 0.226 mm.<br />
* Operating voltage: 3.3 V / 5 V; the new driver board (V2.1 and later) supports both voltages.<br />
* SPI configuration: CPHL=0, CPOL=0 (SPI0); CS active low, DC=0 for command, DC=1 for data.<br />
* Refresh times: full refresh ~15 s, rapid refresh ~10 s, partial refresh (black/white) ~1.8 s.<br />
* Pixel definition: in monochrome images, bit 1 = white, bit 0 = black; 1 byte controls 8 pixels.<br />
* For three colors, two separate image data streams must be transmitted: one for black/white and one for red/white.<br />
* Pico pin mapping: DIN→GP11, CLK→GP10, CS→GP9, DC→GP8, RST→GP12, BUSY→GP13, VCC→VSYS, GND→GND.<br />
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'''Commands and examples – verify before use:''' <br />
<syntaxhighlight lang="text"><br />
cd ~ && sudo wget https://files.waveshare.com/upload/5/5a/Pico_ePaper_Code.zip && unzip Pico_ePaper_Code.zip -d Pico_ePaper_Code && cd ~/Pico_ePaper_Code<br />
cd ~ && git clone https://github.com/waveshare/Pico_ePaper_Code.git && cd ~/Pico_ePaper_Code<br />
</syntaxhighlight><br />
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== Notes and version constraints ==<br />
* Partial updates must not be used continuously; after several partial updates, perform a full refresh once, otherwise the display may be irreparably damaged.<br />
* Do not leave the display powered on for extended periods; use sleep mode or power off when idle.<br />
* Recommended refresh interval: at least 180 seconds between refreshes and at least once every 24 hours.<br />
* Image data sent while in sleep mode is ignored; re-initialize before displaying again.<br />
* The FPC cable is fragile: bend it only horizontally, never vertically.<br />
* If image displays incorrectly, verify image size parameters first; border color is adjusted via register 0x3C or 0x50 (see datasheet for details).<br />
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== Source and revision record ==<br />
* [https://www.waveshare.com/wiki/Pico-ePaper-2.9-B Pico e-Paper 2.9 (B) - Waveshare Wiki]<br />
* Source revision: 69237<br />
* Captured: 2026-09-02T02:36:19+00:00<br />
* SHA-256: <code>39b45bab8ef321f655c852d3641d2f7008a928e686bf0a84013e98e314258f33</code></div>JWTechPublisher