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WSAL19408 – Pico-ePaper-2.9/en

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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.

Summary

Technical overview of the 2.9-inch E-Ink display with 296×128 pixels, SPI interface and four grayscale levels.

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Technical overview

  • Resolution: 296 × 128 pixels; screen diagonal approx. 2.9 inches.
  • Active area: 66.89 mm × 29.05 mm; raw panel outline 79.0 mm × 36.7 mm × 1.05 mm; with driver board 82.0 mm × 38.0 mm.
  • Interface: SPI mode CPHL=0, CPOL=0 (SPI0); CS active-low, DC selects command/data.
  • Operating voltage: 3.3 V / 5 V; standby current below 0.01 µA; refresh power typically 26.4 mW.
  • Refresh times: partial about 0.6 s; full about 3 s; flickering during global refresh is a normal phenomenon.
  • Pixel rendering: monochrome: 0 = black, 1 = white; one byte stores eight pixels.
  • Four grayscale levels: black 00b, dark grey 10b, light grey 01b, white 11b; two bits per pixel.
  • Two frame-buffer registers (0x24 and 0x26) are combined to produce the four grayscale values.
  • Hardware wiring to Pico/Pico 2 via 8-pin cable: VCC→VSYS, GND→GND, DIN→GP11, CLK→GP10, CS→GP9, DC→GP8, RST→GP12, BUSY→GP13.
  • Demo code is available as a ZIP or Git repository; the C project is built with CMake and make, producing epd.uf2.

Commands and examples – verify before use:  

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
git clone https://github.com/waveshare/Pico_ePaper_Code.git
mkdir build
export PICO_SDK_PATH=../../pico-sdk
cmake -DPICO_BOARD=pico -DPICO_PLATFORM=rp2040 ..
make -j9
cp epd.uf2 /media/pi/RPI-RP2/

Notes and version constraints

  • The stated refresh times and power figures are experimental measurements; real-world deviations are possible.
  • Flickering occurs during global refresh – this is a normal phenomenon, not a fault.
  • After waking from deep sleep, the display must be re-initialized and cleared first to avoid afterimages.
  • Four-grayscale display is only supported by full refresh; partial refresh does not show four-gray-scale output.
  • The exact line in main.c that must be uncommented depends on the specific display type; verify before compiling.
  • The demo code instructions reference external links (Raspberry Pi docs, Waveshare files) whose availability is not guaranteed.

Source and revision record

  • Pico e-Paper 2.9 - Waveshare Wiki
  • Source revision: 109821
  • Captured: 2026-09-01T04:14:41+00:00
  • SHA-256: 22e3ddb1e0671f554b87d4be1fcba544b33ed7693cb67fe583425b32d13bedbe
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