Here’s the English translation of the steps and guidelines for writing Wi-Fi information to an NFC tag using NFC TagWriter:

1．Step-by-Step Instructions1. Prepare Tools and Environment

– NFC Tag: Must support NDEF format (e.g., NTAG 21x series). Use NXP-certified tags (e.g., NTAG213/215/216) for reliability.

– NFC-enabled Android Device: Ensure NFC is turned on and install the latest version of NFC TagWriter by NXP (v6.0.0 or newer recommended).

2. Open TagWriter and Configure Wi-Fi Settings

– Launch the app, tap “Write tags” > “New dataset” > “Link”, then select “Wi-Fi Pairing”.

– Enter the following Wi-Fi details:

• SSID (Network Name): Must exactly match the target network (case-sensitive).

• Encryption Type: Choose WPA2, WPA3, or “No password” (not recommended).

• Password: Enter the password if encryption is enabled (leave blank for open networks).

3. Pre-Write Configuration

– Optional settings (requires tag support):

• “Add launch application”: Enables automatic redirection to the Wi-Fi settings screen.

• “UID Mirroring” or “Counter Mirroring”: Tracks tag usage (requires backend support).

– Tap “WRITE” to proceed.

4. Write to the NFC Tag

– Place the NFC tag near the phone’s backside (NFC sensor area) and hold it steady until a “Write successful” message appears.

– Some Android versions may require a second confirmation: Tap “TAP TO CONFIRM STORE” and re-scan the tag.

5. Verification and Testing

– Test the tag with another NFC-enabled device to confirm it triggers the Wi-Fi connection prompt and connects successfully.

– If it fails, use TagWriter’s “Backup tag content” feature and rewrite the tag.

2．Key Considerations1. Tag Compatibility

– Low-cost tags (e.g., CUID cards) may not support NDEF-formatted Wi-Fi data. Prioritize NTAG series tags.

– Use TagWriter’s “Erase” function to clear data if the tag is encrypted or formatted.

2. Android System Variations

– Some devices may prompt additional user confirmation (e.g., “Open link?”).

– Disable “NFC Payment Priority Mode” to avoid interference during tag writing.

3. Advanced Features

– Use “Write multiple tags in sequence” for bulk operations.

– Export/import datasets to edit configurations offline and share them across devices.

3．Feature Notes• The Wi-Fi Pairing feature in TagWriter is optimized for seamless network access and works with all pre-formatted NDEF tags.

• Verify written data using “View tag content” to avoid data loss from low-quality tags.

By following these steps, you can efficiently store Wi-Fi credentials on an NFC tag for a hassle-free “tap-to-connect” experience.