2.13inch NFC-Powered e-Paper (G) User Guide

Introduction

This is an NFC-powered module with a 2.13inch e-Paper display, with a resolution of 122×250. It supports users to wirelessly transmit image information through an NFC enabled card readers or mobile phones, and display the information on the e-Paper screen.

Features

No backlight required, the e-Paper screen can keep displaying the last content for a long time without power
It does not contain a power supply such as a battery, suitable for applications where power supply is limited.
The content displayed can be customized and controlled at any time by the user using a smartphone, convenient and flexible
Suitable for equipment labels, shelf labels, information storage, etc.
Equipped with ABS plastic shell with good strength and toughness
Provides a supporting Android APP to help users edit and manage the display content of the e-Paper display
Provides complete supporting information and manuals

Specifications

Power: NFC-powered
Resolution: 122 x 250
Dot pitch: 0.194 × 0.194
Display colors: Red, Black, White, Yellow
Refresh time: 16s
Viewing angle: >170°
Outline dimensions: 65.35mm × 40.05mm × 12.70mm
Display size: 23.70mm × 48.55mm

User Guide

For the convenience of use, we provide a mobile app. Please make sure that your telephone supports the NFC function and is enabled.

App Test on Mobile Phones

Phone model	Test result
Redmi K40 Pro+	Normal
Xiaomi 14 Ultra	Normal
Huawei Mate 60 (Android system)	Normal
Huawei Mate 60 (HarmonyOS, non-pureblood)	Normal
OnePlus 13T	Normal
OPPO Reno12	Normal
vivo X200s	Normal

NFC Sensing Location Reference

Android APP

Demo Download

You can scan the QR code below to download and install the APP on your phone, note that the app can only support Android 4.0 (Ice Cream Sandwich) and above. Note: Do not scan with WeChat, please use the scanning function of your browser

Usage Steps

The steps to use the app are:

1. Click Binding device button to read the device information to be refreshed first; After the binding is complete, the corresponding information will be displayed on the main page

2. Click the "Album" icon to enter the album, then select the image you want to display, confirm the selection, and you will then enter the following page

3. You can perform the corresponding processing on the image by selecting the corresponding button. Click the Import button to start importing the image (PS: If you have not separated the e-Paper screen and phone after binding, you need to re-contact it after separation)

4. Wait for the refresh to complete, expected 20s
5. Text operation, select the Text icon on the main page (PS: you also need to bind the device first)

6. Start drawing text, and you can choose the font size, color, and font of the text; Simply drag to adjust the position of the text in the image below;

Alternatively, you can choose to "Import background template image". This image must be consistent with the resolution of the e-Paper screen. After completing all the settings, click the "√" in the upper right corner to save the image and enter the image processing page, then proceed to step 3 above

7. Palette operation, select the Palette icon on the main page (PS: you also need to bind the device first)

8. Start drawing shapes on the screen with your finger; the default brush is black with a width of 5. Click the gear in the lower right corner to access the brush selection, click the "√" in the upper right corner to save the image and enter the image processing page, then proceed to step 3 above

9. Shoot operation, select the Shoot on the main page (PS: you also need to bind the device first)

10. Shoot and take a screenshot of the image, then proceed to step 3 above

ST25R3911B NFC Board

Demo Download

The reader has the program flashed in at the factory, so you can skip the program download and test it directly if you don't need to modify the program
ST25R3911 NFC Board (NFC Board for short) provides a SW download interface, allowing users to connect a downloader via this interface to download the program to the driver board.
After the program is downloaded, connect the reader's Micro USB port to the PC using a Micro USB cable

Demos for Image Refresh

Connect the USB port of the reader to the computer or 5V power supply using USB first
Copy the prepared monochrome bitmap to the TF card. Insert the TF card into the card slot of the NFC Board
Connect the 5V power supply to the USB interface of the NFC Board
The directory is displayed on the screen, and you can select the e-Paper display model and corresponding images to refresh by pressing the buttons

Move the mouse to select the Update e-Paper option
Select the display model to refresh based on the your display
Select the corresponding image transfer method

TF card reading image: Update E-paper SD

Select an image (note that the image resolution should match the screen resolution)
Confirm the image

Serial transmission image: Update E-paper UART

Send BMP format images via serial port (note that the image resolution should match the screen resolution)

Place the coil of the NFC Board near the center of the NFC Powered e-paper
Waiting for successful image updating

Select Demo
Select the display mode
Select image acquisition method(TF card)
Select image(TF card)
Confirm selection(TF card)
Read image from TF card(TF card)
Select image acquisition method(Serial port)
Wait for the image transmission (serial port)
Prompt to attach the reader coil to the display
Detect the display successfully
Configure the display
Updating
Update successfully and exit

If prompted with refresh failure, please remove the reader and reposition for refresh

Note: Due to the limited communication distance of NFC, please do not move the device during refreshing to improve the success rate.

Resources

Mobile App

Android APP

FAQ

Question: What is the usage environment of the e-Paper display?

Answer:

[Working conditions]: Temperature range: 0~50°C; Humidity range: 35%~65%RH
[Storage conditions]: Temperature range: below 30°C; Humidity range: below 55%RH; Maximum storage time: 6 months
[Transportation conditions]: Temperature range: -25~70°C; Maximum shipping time: 10 days
[After unpacking]: Temperature range: 20°C±5°C; Humidity range: 50±5%RH; Maximum storage time: Complete assembly within 72 hours