E-Paper - Display Text

Materials

  • AmebaD [AMB21 / AMB22 / AMB23 / AMB25 / AMB26 / BW16 / AW-CU488 Thing Plus] x 1

  • Waveshare E-Paper [2.9inch E-Paper HAT (D)/ 2.9inch E-Paper V2/ 2.9inch e-Paper Module (B)/ 4.2inch e-Paper Module/ 4.2inch v2 e-Paper Module/ 7.5-inch E-Ink display HAT] x1

Example

In this example, AmebaD boards will be used to connect to a Waveshare e-Paper module (2.9inch/ 4.2inch/ 7.5inch) to display texts. The display uses the flexible substrate as base plate, with an interface and a reference system design. You may refer to the official datasheet to know more information about these modules.

AMB21/22 wiring diagrams:

2.9inch HAT (D) e-Paper Module

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2.9inch E-Paper V2 e-Paper Module/ 2.9inch e-Paper Module (B)

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4.2inch e-Paper Module/ 4.2inch v2 e-Paper Module

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7.5-inch e-Paper Module Do note that Display Config should be set to B and Interface Config should be set to 0.

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Download the Eink zip library, AmebaEink.zip, at https://github.com/Ameba-AIoT/ameba-arduino-d/tree/master/Arduino_zip_libraries. Then install the AmebaEink.zip by navigating to “Sketch” -> “Include Library” -> “Add .ZIP Library…”.

Eink examples are categorised based on the size and modules of the e-Paper display.

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Open one of the “EinkDisplayText” examples. For example, “File” → “Examples” → “AmebaEink” → “EPD_2in9v2” → “EinkDisplayText”:

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You may choose any GPIO pins for Busy, Reset and DC pin.

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Upload the code to the board and press the reset button after uploading is done. You will find these texts displayed on the boards:

The 2.9-inch e-Paper Module (B) supports three colours—red, black, and white. Therefore, it can display red on the e-Paper display shown on the most left.

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Code Reference

[1] We use Good Display GDEH029A1 2.9 Inch / 296x128 Resolution / Partial Refresh Arduino Sample Code to get the e-Paper successfully Display: http://www.good-display.com/product/201.html

[2] EPD libraries can be obtained from: https://github.com/waveshare/e-Paper

[3] Generate a QR code on the E-paper module: https://eugeniopace.org/qrcode/arduino/eink/2019/07/01/qrcode-on-arduino.html