A letter/number/symbol 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/symbol 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), numbers (0 to 9) and symbols in Morse on RFID interface (125 kHz). Range is about 5m with a SDR.
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 from the Flipper Zero.
A letter:
3 number:
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.
- 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
-
2023-07-11
- Bug fixing
- Symbols have been added
- Morse code view has been added
-
2023-07-09
- Initial release