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flipperzero-firmware/documentation/file_formats/iButtonFileFormat.md
2023-01-07 03:18:43 +09:00

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# iButton key file format
## Example
```
Filetype: Flipper iButton key
Version: 1
# Key type can be Cyfral, Dallas or Metakom
Key type: Dallas
# Data size for Cyfral is 2, for Metakom is 4, for Dallas is 8
Data: 12 34 56 78 9A BC DE F0
```
## Description
Filename extension: `.ibtn`
The file stores a single iButton key of the type defined by the `Key type` parameter.
### Version history
1. Initial version.
### Format fields
| Name | Description |
| -------- | -------------------------------------------- |
| Key type | Currently supported: Cyfral, Dallas, Metakom |
| Data | Key data (HEX values) |