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Display Images on E-paper using Ameba RTL8722DM

Using Ameba RTL8722DM to connect to waveshare 2.9 inch e-Paper module to display images

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In this project, we are using Ameba RTL8722DM to connect to a Waveshare 2.9" e-Paper module to display a few QR codes. The display uses the flexible substrate as a base plate, with an interface and a reference system design.

Ameba RTL8722DM is a low-power dual-band WLAN and Bluetooth Low Energy SoC by Realtek. The RTL8722DM also include memory for Wi-Fi protocol functions and application making it simple for anyone to develop various kind of IoT applications. At the same time it has a wide range of peripheral interfaces. With all these interfaces, it can connect to most of the electronics components like LEDs, temperature and humidity sensors, and so on.

The e-Paper module display uses the flexible substrate as a base plate, with an interface and a reference system design. The 2.9" active area contains 296x128 pixels and has 1-bit white/black full display capabilities. An integrated circuit contains gate buffer, source buffer, interface, timing control logic, oscillator, etc... are supplied with each panel. You may refer to the official 2.9inch e-Paper HAT (D) datasheet to know more information about this module.

For demo video, please check out the video below:

More Resources:

If you need additional technical documents or the source code for this project. Please visit the official websites and join the Facebook group and forum.

  • 1 × Ameba RTL8722DM microcontroller
  • 1 × Waveshare 2.9" e-Paper HAT (D)

  • 1
    Setup

    First, connect the Waveshare e-Paper module to Ameba RTL8722DM shown in the wiring diagram below:

  • 2
    Programming

    The programming of the Ameba RTL8722DM can be done using Arduino IDE which makes it very easy to write code and upload code to the Ameba Board.

    Firstly, you need to prepare a picture/photo in the format of 296×128 pixels. We can easily find a photo resizing tool online, for example, the Online Image Resizer. Following the instructions on the website, then download the generated image in JPG format. Secondly, we use the Image2LCD tool to transfer the downloaded 296×128 image into hexadecimal codes. You can visit this YouTube link to get detailed instructions.

    To open the example code in Arduino IDE, Open "File" -> "Examples" -> "AmebaEink" -> "EinkDisplayImage"

  • 3
    Final Results!

    Verify and upload the code. Press the reset button on Ameba once the uploading is complete. Wait for 1 ~ 2 seconds for the e-Paper module to refresh its screen. The the screen will display an image for 5 seconds  and the other 3 QR codes will be displayed at a 5 seconds intervals.

View all 3 instructions

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GooDisplayEpaper wrote 08/02/2021 at 05:30 point

Very interesting project!

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