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WSAL20128 – Pico-ePaper-7.5/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 guide to the Waveshare Pico-ePaper-7.5 (WSAL20128): a 7.5-inch black/white e-ink display with 800×480 resolution and an SPI interface, driven by the Raspberry Pi Pico.

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Technical overview

  • Resolution: 800 × 480 pixels; colors: black/white (2 grey levels)
  • Interface: SPI (CPHL=0, CPOL=0, i.e. SPI mode 0); CS active-low, DC selects command/data
  • Operating voltage: 3.3 V; standby current < 0.01 µA; refresh power ~26.4 mW (typ.)
  • Full refresh takes ~5 s; a normal flicker occurs during full refresh
  • Dimensions: raw panel 170.2 × 111.2 × 1.18 mm; driver board 65 × 31 mm; display area 163.2 × 97.92 mm; dot pitch 0.205 × 0.204 mm
  • Pico pinout: DIN→GP11 (MOSI), CLK→GP10 (SCK), CS→GP9, DC→GP8, RST→GP12, BUSY→GP13, VCC→VSYS, GND→GND
  • Two user buttons plus one reset button on the board for simple interaction
  • Pixel encoding: 1 bit per pixel (black = 0, white = 1), so 8 pixels per byte
  • Development code is in the Pico_ePaper_Code repository (C and MicroPython examples); the C project is built with CMake + Pico-SDK and flashed as a .uf2 file
  • E-paper uses MED technology (microencapsulated electrophoresis) without a backlight; it reflects ambient light, viewing angle 180°

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 && cd ~/Pico_ePaper_Code
cd ~/Pico_ePaper_Code/c && mkdir build && cd build && export PICO_SDK_PATH=../../pico-sdk && cmake -DPICO_BOARD=pico -DPICO_PLATFORM=rp2040 .. && make -j9
cp epd.uf2 /media/pi/RPI-RP2/
sudo apt upgrade thonny

Notes and version constraints

  • Refresh time and power figures are test measurements; expect deviations depending on driver board and usage conditions
  • Brief flicker during a full refresh is normal
  • After deep sleep the display must be re-initialized in software; on first wake-up clear the screen first to avoid afterimages
  • If the program hangs in 'busy': check wiring and verify SPI settings (baud rate, mode)
  • The definition line in main.c must be adjusted for the specific e-paper type – select the 7.5-inch variant
  • No warranty, certification or pricing information appears in the source; do not add such values

Source and revision record

  • Pico e-Paper 7.5 - Waveshare Wiki
  • Source revision: 104192
  • Captured: 2026-09-02T03:19:40+00:00
  • SHA-256: 4a4b16700328bc12f3e864106a843347dbea34517f4506578ceb82d3121e7aac
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