3.2英寸 SPI 串口显示模块

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Arduino

E-paper 24P Shield

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Arduino

Introduction

E-paper 24P Shield is an e-paper shield compatible with the Arduino standard interface. Through the onboard FPC 24P connector (0.5 mm pitch),

it accepts various FPC 24P interface e-paper screens, and pairs with any mainboard supporting the Arduino interface via standard Arduino pin headers.

Key Features

 Plug and Play: using the universal Arduino pin-header interface, it stacks directly onto Arduino UNO / Leonardo / Mega and other standard mainboards.

 Multi-Screen Compatible: via the FPC 24P interface, it supports various 24P e-paper modules (black/white / black/white/red / black/white/red/yellow etc.).

 Vendor Compatible: via the P2 jumper, select 2.2 Ω / 0.47 Ω resistance to match different vendors' e-paper screens.

 Low-Power Friendly: an e-paper screen consumes zero power for static display, ideal for battery-powered IoT labels, price tags, reminder boards and similar scenarios.

About the Arduino Interface

The Arduino header interface is a universal standard in the open-source hardware world and is not exclusive to any particular mainboard. Any mainboard following the Arduino UNO R3 pin definition (such as Arduino UNO, Leonardo, Mega, ESP32-Arduino compatible boards, etc.) can be used directly with this Shield.

Specifications

Pin Description

Pin	Direction	Description
3V3	Power input	Supplied from the 3.3 V rail of the Arduino mainboard; powers the e-paper driver circuit.
GND	Power ground	Common ground, connected to the GND of the Arduino mainboard.
SCK	SPI clock	SPI bus clock line, output by the Arduino host.
SDA	SPI data / MOSI	Data line sent by the SPI host and received by the e-paper screen.
CS	Chip select	Active low; selects the current e-paper screen for communication.
DC	Data / Command	High: data transfer; low: command transfer.
RES	Reset	Low level resets the e-paper driver; a falling edge after power-up is recommended.
BUSY	Status input	E-paper busy flag; high means a refresh is in progress and the MCU should wait.

Hardware

Core signals include SCK, MOSI, CS, DC, and RESET; backlight is independently controlled. Do not apply 5V directly to 3.3V signal pins.

Size

1. Connect power and SPI signals per the pinout table.
2. Configure chip select and orientation in the driver.
3. Run a solid color test first, then load the graphical UI.
4. Adjust SPI clock based on bus length.

FAQ

Why is the screen all white?

Check reset, chip select, data/command pins, and initialization model.

What if the image has noise?

Lower the SPI clock and shorten the connection wires.

Downloads

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