Seeed Studio E-Paper Driver Board for Seeed Studio XIAO

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Seeed Studio E-Paper driver board features a 24-pin FPC connector, built-in charging IC for efficient and safe battery charging, and a JST 2-pin BAT connector for easy battery connection. Ideal for creating WiFi-enabled digital photo frames.

Feature

  • Built-in Charging IC : Ensures efficient and safe battery charging.
  • BAT Connector with Switch : Allows for easy battery connection and includes a switch to combine the battery and switch for more efficient energy saving.
  • 24-Pin PFC Connector : Provides versatile connectivity options for various peripherals.
  • Extension IO Port : Enables connection of additional sensors, such as temperature and humidity sensors, for enhanced functionality.
  • Compatible with Seeed Studio XIAO Ecosystem : Seamlessly integrates with the XIAO series(Pre-Soldering Version) for versatile project development.


Hardware Overview

1 - 24-pin FPC Conncctor: For the ePaper interface.

2 - JST BAT Connector: For battery connection and switch.

3 - XIAO Socket: For connecting the Seeed Studio XIAO development board.

4 - IO Break out: For connecting Grove sensors or the others controller, such Arduino UNO or Raspberry Pi.

5 - Power switch: For battery power control.

Getting Started

To use the Seeed Studio XIAO eInk Expansion Board, we need to program the XIAO series. The table of different sizes E-paper supported by XIAO is as follows:

E-paper / XIAO XIAO SAMD21 XIAO RP2040 XIAO nRF52840 XIAO ESP32-C3 XIAO ESP32-S3
1.54-inch E-paper - Dotmatix 200x200 ✅ ✅ ✅ ✅ ✅
2.13-inch E-Paper -Flexible Monochrome 212x104 ✅ ✅ ✅ ✅ ✅
2.13-inch E-Paper - Quadruple 212x104 ✅ ✅ ✅ ✅ ✅
2.9 inch E-paper - Monocolor 128x296 ✅ ✅ ✅ ✅ ✅
2.9-inch e-paper - Quadruple color 128x296 ✅ ✅ ✅ ✅ ✅
4.2-inch E-Paper - Monocolor 400x300 ✅ ✅ ✅ ✅ ✅
4.26-inch E-Paper - Monocolor 800x480 RAM overflowed ✅ ✅ ✅ ✅
5.65-inch E-paper - Sevencolor 600x480 FLASH overflowd ✅ ✅ ✅ ✅
5.83-inch E-paper - Monocolor 648x480 ✅ ✅ ✅ ✅ ✅
7.5-inch E-paper - Monocolor 800x480 RAM overflowed ✅ ✅ ✅ ✅
7.5-inch E-paper - Tri-Color 800x480 RAM overflowed ✅ ✅ ✅ ✅

STEP 2

Insert the XIAO into the XIAO Socket: Align the pins and gently insert your XIAO into the XIAO socket on the board.

STEP 3

Insert the eInk into the FPC Connector: Carefully slide your E-paper into the 24-pin FPC connector on the ePaper Breakout Board.

Using the Seeed_Arduino_LCD Library

Download The Seeed Arduino LCD Library

Specification

ePaper Connector

FPC 24 Pin 0.5mm

Top Contact

Battery Charge IC

ETA9740

Battery Connector

JST 2.0mm

Switch

Battery Power ON/OFF

Female Header

7 Pin 2.54mm

Connecting to MCUs like Seeed Studio XIAO

Power Supply

● 3.7V Li-Battery

● Seeed Studio XIAO

EPaper Selection Guide

Product Name Resolution Display Color Partial Refresh

1.54" Monochrome ePaper Display

200x200

√

2.13" Monochrome Paper

122x250

√

2.13" Quadruple Color Paper

122x250

2.13" Flexible Monochrome Paper

212x104

√

2.9" Monochrome Paper

296x128

√

2.9" Quadruple Color Paper

128x296

4.2" Monochrome Paper

400x300

√

5.83" Monochrome Paper

648x480

√

5.65" Seven-Color ePaper

600x448

7.5" Monochrome Paper

800x480

√

Application

  • Smart Home Dashboard : Display real-time information such as weather updates, calendar events, and notifications from various smart home devices.
  • Energy Monitoring : Show energy consumption data from smart meters, helping homeowners track and manage their energy usage more efficiently.
  • Security Alerts : Display alerts and notifications about security events, such as motion detection or door/window sensor activation.
  • Smart Thermostat Display : Show temperature and humidity levels, as well as control settings for your smart thermostat.
  • Digital Photo Frame : Create a WiFi-enabled digital photo frame that can display images from your smart home network.

Part List

ePaper Driver Board

×1

Image Extraction Software

Here I'm using a 7.5-inch e-inked screen for the test

How to Make Picture

This URL provides a very convenient image extraction operation, which can easily help us realize displaying a variety of images on top of the e-ink screen, let's get started!

Step 1.Select image

First pick the image you want, try not to exceed the size of 800*480.

Step 2.Image Settings

  • Canvas Size(s)

    • Canvas Size: Set the dimensions of the canvas. For example, 800 x 480 pixels means the canvas width is 800 pixels and the height is 480 pixels.

  • Background Color

    • Background Color: Choose the background color of the canvas. Options include:

    • White: White background

    • Black: Black background

  • Transparent: Transparent background

    • Invert Image Color
    • Invert Image Color: This option is used to invert the colors of the image. When selected, the colors of the image will be reversed.

  • Brightness / Alpha Threshold

    • Brightness / Alpha Threshold: Set the brightness value of the pixels, ranging from 0 to 255. Higher values make the pixels brighter; pixels below this value will turn black.

  • Scaling

    • Scaling: Choose the scaling method for the image. Options include:

  • Original size: Maintain the original size

    • Other scaling options (specific options may need further explanation)

  • Center

    • Center: Choose whether to center the image on the canvas. Note: This option only works if the image is larger than the original size.

Step 3.Preview

Once the settings are complete, you can see a preview of how your image will appear here

Step 4.Output

  • Copy the converted code
  • Replace the image code in this header file

Display Effect

Usage of the Image2lcd software

How to Make Picture

Use the build-in software Paint in Windows to create a picture with the same resolution as the screen you are using, and save it as or file;

Your picture resolution must be the same as the screen you are using, for example, 4.2-inch E-paper is 400 x 300 pixels, then you can not use the size of 300 x 400, it will cause the iamge2lcd output file with an extra 200 bytes.

The colors of the picture should be consistent with the standard colors of the drawing board that come with Windows.The color of the drawing board is as follows:

E-paper Colors
1.54-inch E-paper - Dotmatix 200x200 pure black and white
2.13-inch E-Paper -Flexible Monochrome 212x104 pure black and white
2.13-inch E-Paper - Quadruple 212x104 black, white, red, and yellow
2.9 inch E-paper - Monocolor 128x296 pure black and white
2.9-inch e-paper - Quadruple color 128x296 black, white, red, and yellow
4.2-inch E-Paper - Monocolor 400x300 pure black and white
4.26-inch E-Paper - Monocolor 800x480 pure black and white
5.65-inch E-paper - Sevencolor 600x480 black, white, red, yellow, blue, green, orange
5.83-inch E-paper - Monocolor 648x480 pure black and white
7.5-inch E-paper - Monocolor 800x480 pure black and white
7.5-inch E-paper - Tri-Color 800x480 pure black and white

Bitmap Conversion

Step 1. Open Image2lcd.7z, extract it and open the application.

Step 2. Open the picture, select the "Output file type" as the "C array (*.c)", select the "Scan mode" as the "Horizon Scan", the other parameters setting is show in follows:

Epaper BitPixl Max Width and Height Reverse color Display mode
1.54-inch E-paper - Dotmatix 200x200 Monochrome 200x200 ✅ Mirror left-right
2.13-inch E-Paper -Flexible Monochrome 212x104 Monochrome 104x212 ✅ Normal
2.13-inch E-Paper - Quadruple 212x104 4 Gray 104x212 / Normal
2.9 inch E-paper - Monocolor 128x296 Monochrome 128x296 ✅ Normal
2.9-inch e-paper - Quadruple color 128x296 4 Gray 128x296 / Normal
4.2-inch E-Paper - Monocolor 400x300 Monochrome 400x300 ✅ Mirror left-right
4.26-inch E-Paper - Monocolor 800x480 Monochrome 800x480 / Mirror left-right
5.65-inch E-paper - Sevencolor 600x480 256 colors 600x448 / Normal
5.83-inch E-paper - Monocolor 648x480 Monochrome 600x480 ✅ Mirror left-right
7.5-inch E-paper - Monocolor 800x480 Monochrome 800x480 ✅ Mirror left-right
7.5-inch E-paper - Tri-Color 800x480 Monochrome 800x480 / Normal
  • After set the Max Width and Height, it need to click the arrow to confirm.
  • Don't include head data.

Step 3. Click "Save" to save the the lcd output array as a file of .

Resources

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