GooDisplay GDN0213BW 2.13-inch E-paper Display Tag

1. Overview

The GDN0213BW e-paper tag utilizes NFC communication and power harvesting technology. It includes a mobile app that allows users to update the display content directly from their smartphones, simplifying the update process. Users can import desired images into the app without complex template operations. NFC communication and the mobile app enable instant e-paper content updates, making it particularly useful for scenarios requiring frequent changes or real-time updates. This communication method is convenient and does not require specialized skills, allowing ordinary users to easily update and control the display content.

Note: Not all phones with NFC functionality can drive the display; real-device testing is required.

2. Advantages

• The display can be updated via smartphone NFC.
• Battery-free, powered by NFC technology.
• Image formats supported: BMP, PNG, JPG.

3. Specifications

4. Product Structure

The product consists of the e-paper display tag itself.

Figure 1 Front view of GDN0213BW: An e-paper display tag showing 'Pineapple $0.99 /kg' with the GooDisplay logo.

Figure 2 Rear view of GDN0213BW: The rear of the e-paper tag, highlighting a mounting clip labeled '[1]'.

Mounting clip: Used to secure the NFC label in place.

5. Display Update

5.1. Image requirements

• Formats: BMP, PNG, JPG.
• Resolution: Use 128x250 for images. (Note: e-paper display GDEY0213B74 resolution: 122x250).
• Import images into the phone using the Android app (NFC-D3-Pro).

5.2. NFC-D3-Pro software installation

Use an Android phone to scan the QR code provided to download and install the NFC-D3-Pro app.

QR code description: A QR code for downloading the NFC-D3-Pro Android application.

5.3. Image Display

1. Install the NFC-D3-Pro mobile app on your phone.
2. Open the NFC-D3-Pro app. Select the corresponding e-paper color (options for monochrome, three-color, and four-color displays). Choose the desired screen size (e.g., 2.13) to enter the main NFC image transfer interface. The main interface typically displays a test image for user testing.
3. Image transfer modes:
   • Camera mode: Tap the 'Camera' button to enter the phone's image selection interface. After choosing an image, the app opens an image preprocessing screen for cropping. Resize the image using the gray rectangle and move it to the desired position. Tap the screenshot button to process the image and enter the NFC image transfer interface. Bring your phone close to the NFC driver board (phone on top, board below). Monitor data transfer progress. Updates typically take about 2 seconds for monochrome, 16 seconds for three-color, and 20 seconds for four-color e-paper.
   • Bitmap mode: Tap the 'Bitmap' button to enter the specific image selection interface. Choose an image with a resolution of 128x250. If the resolution is incorrect, an error message will appear. The transfer process is similar to Camera mode regarding phone placement and data transfer.
   • Note mode: Tap the 'Note' button to enter the notepad editing interface. Manually enter desired information, then tap the 'Save' button to proceed to the NFC image transfer interface. The transfer process is similar to other modes.

6. Common Issues

1. NFC fails to start:

• App shows “NFC is not enabled!”: NFC is not turned on in your phone settings.
• Cannot find NFC switch: Your phone does not support NFC functionality.

2. Abnormal display:

• Data transfer completed, but display is blank or blurry: The NFC driver board may have insufficient driving capability to properly update the display.
• Status bar shows “Update error!”: The e-paper display may be connected to the NFC driver board in the wrong direction or the connection is loose.

7. Packaging and Installation

6.1 Please verify that you have received the following item included in the package:

• E-paper display tag. Illustration: An illustration of the included item: an e-paper display tag.

6.2 Product Installation

• The product should be installed on a flat surface to prevent it from tipping over.
• Leave space between the back of the product and the wall for proper ventilation.
• Do not install the product in kitchens, bathrooms, or damp environments, as this may shorten its lifespan.
• Do not install the product at altitudes of 3000 meters or above, as this may cause malfunctions.