Momentum-Apps/non_catalog_apps/flipper_rfidbeacon

flipperzero-rfidbeacon

A letter/number Morse beacon on 125 kHz using RFID interface of the Flipper Zero

(banner has been made with DALL.E 2)

Like Russia with their HF letter beacons, it's possible to use the Flipper Zero as a letter/number Morse beacon. Flipper Zero has multiple RF interfaces (RFID, NFC and UHF) and it's possible to transmit raw data over these interfaces.

This application can transmit the whole alphabet (A to Z) and numbers (0 to 9) in morse on RFID interface. Range is about 5m.

Gallery

Menu of the application:

Led of the Flipper Zero turns in red when transmitting.

Airspy Discovery HF+ SDR bas been used during these tests with a small loop antenna. Following measures have been made at a distance of 2m.

A letter:

3 number:

Build the program

Assuming the toolchain is already installed, copy flipper_rfidbeacon directory to applications_user

Plug your Flipper Zero and build the RFID beacon:

./fbt launch_app APPSRC=applications_user/flipper_rfidbeacon

The program will automatically be launched after compilation

Button assignments:

button	function
Left/Right [short press]	Select the letter/number to transmit. It's possible to change letter/number during transmitting.
Up [long press]	Enable/disable the transmitter (125 kHz)
Back [long press]	Exit

If you don't want to build this application, just simply copy flipper_rfidbeacon.fap on your Flipper Zero

Build has been made with official toolchain, API Mismatch error may appear if you are using custom firmware. You can bypass this error but the program may crash.

What's next ?

• Choose the speed morse code
• Transmit on NFC interface (13.56 MHz), range is wider than RFID
• Transmit on UHF interface (433 MHz, etc)
• Transmit personalized text message over the air