WSAL13512 – e-Paper Driver HAT/en

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

The universal e-Paper driver HAT connects Waveshare SPI e-Paper raw panels to Raspberry Pi, Jetson Nano, STM32 or Arduino via a 40-pin GPIO header. The current Rev2.3 uses a PWR pin for power control and an RST pin only for reset.

Related products at JW Tech

• WSAL13512 – Universal e-Paper Raw Panel Driver HAT, Supports Most Waveshare SPI e-Paper Raw Panels

Technical overview

• Based on the 40-pin Raspberry Pi GPIO header; also supports Jetson Nano and other boards
• Communication over 3-wire SPI and 4-wire SPI; onboard voltage converter compatible with 3.3 V/5 V logic levels
• Dimensions: 65 mm × 30.2 mm; mounting hole 3.0 mm
• Rev2.3: new PWR pin for power on/off, RST now only for reset; smaller inductor package; PH2.0 8-pin connector replaced by GH1.25 9-pin
• Display configuration via resistor switch: 0.47 Ω (B) for larger panels (e.g. 2.13" D, 2.7", 2.9" D, 4.01" F, 4.2" C, 5.65" F, 5.83", 7.5"), 3 Ω (A) for smaller panels (e.g. 1.54", 2.13", 2.66", 2.9", 3.7", 4.2", 13.3")
• If the display is abnormal, flip the switch to the other position
• Raspberry Pi connection: plug directly onto the 40-PIN header or connect via a 9-PIN cable using the pin mapping table
• Raspberry Pi pin mapping: VCC→3.3V, GND→GND, DIN→MOSI(19), CLK→SCLK(23), CS→CE0(24), DC→22, RST→11, BUSY→18, PWR→12
• STM32 connection via 9-PIN cable: DIN→PA7, CLK→PA5, CS→PA4, DC→PA2, RST→PA1, BUSY→PA3, PWR→PA6
• Arduino UNO: DIN→D11, CLK→D13, CS→D10, DC→D9, RST→D8, BUSY→D7; Mega2560: DIN→D51, CLK→D52, CS→D10, DC→D9, RST→D8, BUSY→D6

Commands and examples – verify before use: 

ls /dev/spi*

Notes and version constraints

• The source contains placeholders such as {{{name2}}} and {{{userDefinedInfo}}}; these values are unavailable and must be filled in manually.
• Exact compatibility with a given panel depends on setting the resistor switch correctly – if malfunction occurs, the switch must be flipped.
• Modifying SPI settings in /boot/config.txt and epdconfig.py is version-dependent and requires manual confirmation.
• When changing stack/heap sizes in the STM32 startup file for models other than F103ZET6, adjustments are needed.
• Color variation in tri-color panels is normal; storing displays face-up reduces discoloration.
• The listed resources (YouTube, GitHub projects) are third-party content without warranty.

Source and revision record

• E-Paper Driver HAT - Waveshare Wiki
• Source revision: 110989
• Captured: 2026-08-30T03:50:43+00:00
• SHA-256: 1a1959294f37ca5c18b78d1c325d236513189f9b0ed0f2b4485808e22a17014c