Flipper .sub (Interoperability)
How Flipper Zero sub-GHz files work
What it does
SimpleThe Flipper Zero is another little hacking-and-learning toy that saves sub-GHz radio recordings in files ending in '.sub'. This page explains how those files describe a signal — the frequency, the type, and the on/off data — so you can understand how different tools share captures.
As with the other replay tools, actually re-sending a signal only makes sense with your own devices, as a learning exercise. The focus here is understanding the file format and interoperability between tools.
How it works
SimpleA .sub file is basically a written-down radio signal: it says what channel to use, what kind of signal it is, and the exact on/off timing. Any tool that understands the format can read that description. It only reproduces fixed (unchanging) signals — it can't beat the modern remotes that change their code every time.
How to use it, step by step
Simple- Understand a .sub file as a written-down description of a signal.
- See the parts: the channel, the type, and the on/off timing.
- Learn that it only copies fixed signals, not changing (rolling) ones.
- Only ever experiment with your own devices.
Examples
Read a .sub file and identify its frequency, preset, and RAW timing sections.
Understand how the same capture can be shared between different sub-GHz tools.
Reinforce why a stored capture can't defeat a rolling-code device.
Tips & things to try
- It's the same fixed-vs-rolling security lesson as the OOK page, via a file format.
- Rolling codes make stored captures worthless after one use — that's the defence.
- Only work with .sub files from devices you own.