Everything was working correctly until about two days ago.

Now, when I try to pair the Chameleon Ultra, I get an error message.

Example: https://drosi.nl/cu

refs

• https://github.com/RfidResearchGroup/ChameleonUltra/blob/main/docs/development.md#uploading-the-code-in-dfu-mode
• Device Firmware Update process
• Dual-bank and single-bank updates
• DFU protocol
• BLE Secure DFU Bootloader
• Cryptography library - nrf_crypto
• SLIP library
• SLIP encoding and decoding
• DFU BLE Service
• https://infocenter.nordicsemi.com/index.jsp?topic=%2Fug_nrfutil%2FUG%2Fnrfutil%2Fnrfutil_dfu_serial.html
• https://github.com/infsoft-locaware/nrfdfu
• https://github.com/thegecko/web-bluetooth-dfu
• https://github.com/GameTec-live/ChameleonUltraGUI/blob/main/chameleonultragui/lib/bridge/dfu.dart
• https://stuk.github.io/jszip/

steps

1. import card dump file
2. emulate non-encrypted mifare card
3. write dump to xiaomi watch

• Text Record
• URL / URI
• Custom URL / URI
• Unit.Link
• Search
• Social Networks
• Video
• File
• Application
• Mail
• Contact
• Phone number
• SMS
• Location
• Custom location
• Address
• Destination address
• Proximity search
• Street View
• Emergency
• Bitcoin
• Bluetooth
• Wi-FI network
• Data

TODO

1. Wait for FredKSchott/rollup-plugin-polyfill-node#77

• https://www.nxp.com/docs/en/data-sheet/NTAG213_215_216.pdf