How To: Jamming Frequencies w/ the Flipper Zero

Fresh, hot, brand new Flipper Zero in the mail; experimented with all the orthodox stuff, and are now looking for “those” juicy jamming files you heard about but never really found yourself?

They’re not a myth — they exist, and we’ve got you if you promise to be ethical about them!

Stuff You Should Know:

• This is 100% illegal in pretty much most parts of the world, and you should only be experimenting with devices you own or have explicit permission to be using. The jamming files have even been removed from some custom firmwares due to the potential misuse

• This will not work on the stock Flipper Zero firmware since it comes with certain regional and frequency restrictions. You would need to install a custom firmware that unlocks these restrictions on the Flipper Zero

• The Flipper Zero does not transmit at high ranges (distance from the target). You would have to place the Flipper Zero quite close to the receiving device for the most effectiveness

• Extensive, continuous transmission of signals (which jamming would consist of) from the Flipper Zero may cause it to heat up or the transmitter getting damaged. Try not to keep the Flipper Zero transmitting for more than a few minutes at a time to be safe

Step 1: Install Custom Firmware

The stock Flipper Zero firmware has certain regional and frequency restrictions. You would need to install a custom firmware that unlocks these restrictions on the Flipper Zero. The most prevalent ones are:

Step 2: Get the Jamming Files

Head over to my GitHub repository, where I have collected all sub-GHz jamming files I could find.

Either clone the repository, or navigate to each file and save the raw file by right-clicking on “Raw” and then “Save link as…”, as shown below:

Step 3: Add the Jamming Files to the Flipper Zero

Once all jamming files have been downloaded, connect your Flipper Zero to your machine. This can be done one of two ways:

A. Via a USB cable and using the qFlipper application to interact with the connected Flipper Zero

B. Via simply accessing the Flipper Zero’s micro-SD card using a card-reader

Navigate to the /subghz/ directory in your Flipper Zero, and (optional) create a new directory named “Jamming” here. The directory structure should now look like /subghz/Jamming.

Lastly, copy all the downloaded jamming files into this /subghz/Jamming/ directory. You may now disconnect the Flipper Zero or micro-SD card from your machine.

Step 4: Usage

Open the “Sub-GHz” application on your Flipper Zero.

Next, navigate to “Saved”, where all saved sub-GHz files (.sub) are stored.

Then, navigate to the “Jamming” directory you had created (if you had created it).

Here, you will see all the added jamming files, each for a different frequency.

Select a frequency you would be jamming, and then send this signal.

This will keep running for about 30 seconds. Any receivers within the jamming range of the Flipper Zero (pretty darn close) that operate on the frequency being jammed should now not be effective to the genuine transmitter (legitimate remote, etc.).

Disclaimer: This exists for the purposes of education, research, and experimentation with devices you yourself own. We neither endorse nor shall be held responsible for any potentially unethical or malicious activity from your usage of this.

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