- The file format is [documented](https://flipperdevices.github.io/flipperzero-firmware/md_docs_file_formats__sub_ghz_file_formats.html) on the flipperdevices github account.
- There are two types of .sub files.
- Files where the protocol is known.
- Files where the protocol is unknown.
- For unknown protocols, the "Filetype:" will be "Flipper SubGhz RAW File".
- You will see "RAW_Data:" lines. The positive numbers are the length of tones (in uS, which is 1/1000 millisecond.) The negative numbers are the length of the silences (in uS).
- You can interpret and create RAW files to send a different button; see these [videos](../../youtube/README.md#sub-ghz--hacking-sub-ghz-devices-read-raw).
- For known protocols, the "Filetype:" will be the name of the protocol. Often for known protocols the file has a line called "Key:" with the data needed for transmitting the code.
- You can edit the "Key" data to send a different button; see these [videos](../../youtube/README.md#sub-ghz--hacking-sub-ghz-devices-read).
