Reading signals
You can read, save, and emulate different types of remote controls with known protocols with your Flipper Zero. On this page, you will learn: how to read and emulate remote controls, the list of supported transmitting frequencies, and how to determine the remote's frequency.
There are remote controls that work on protocols that Flipper Zero doesn't know yet. Signals from these remotes can be recorded in raw format, saved, and replayed with Read RAW function.
We constantly update and improve the Flipper Zero firmware with the help of our community. To make your contribution to helping Flipper Zero support more remotes, you can leave information about your remote on the forum.
In the Read mode, Flipper Zero reads and decodes demodulated signals from remote controls based on known protocols. If the remote's protocol is static, Flipper Zero can save and send the signal. To read and save the signal from the remote control, do the following:
- Go to Main Menu → Sub-GHz.
- Press Read, then press the button on the remote control you want to read.
3. When the signal is captured, press :ok:OK, then press Save.
4. Name the captured signal, then press Save.
In this menu, you can switch frequencies manually and in Hopping mode, switch modulations manually, and lock the keypad while scanning for signals. To open the Configuration Menu, on the scanning screen, press Config. You will see the following:
You can switch frequencies at which Flipper Zero receives signals. In the Configuration Menu, by pressing :left:LEFT or :right:RIGHT you can manually set frequencies from the list:
To read the signal correctly, it is necessary to determine the frequency of the remote. For that, you can use the Frequency Analyzer function.
When analyzing, Flipper Zero is scanning signals strength (RSSI) at all the frequencies available in frequency configuration. Flipper Zero displays the frequency with the highest RSSI value, with signal strength higher than -90dBi.
To determine the remote's frequency, do the following:
- Place the remote control very close to the left of Flipper Zero.
2. Go to Main Menu → Sub-GHz. 3. Select Frequency Analyzer, then press and hold the button on the remote control you want to analyze. 4. Review the frequency value on the screen.
To receive a signal at an unknown frequency, use the Hopping mode. In this mode, Flipper Zero switches quickly between the available frequencies and measures the signal strength. Once the signal strength exceeds -90dbi, switching stops and Flipper Zero receives the signal at that frequency for one second, then switching between frequencies resumes.
To scan for signals in the Hopping mode, in the Configuration Menu, set Hopping to ON.
In the Hopping mode, you can also manually switch modulations.
To capture the signal from the remote control, you need to configure the correct modulation settings on your Flipper Zero. Because Flipper Zero is not a software-defined radio, you need to configure the right modulation before scanning the signal, otherwise, you will not receive the correct data.
Flipper Zero supports Amplitude (AM) and Frequency (FM) signal modulations. In the Configuration Menu, by pressing :left:LEFT or :right:RIGHT, you can manually set signal modulations from the list:
- AM270 — amplitude modulation with the bandwidth of 270 kHz.
- AM650 — amplitude modulation with the bandwidth of 650 kHz (set as default).
- FM476 — frequency modulation with the bandwidth of 270 kHz and the deviation of 47.60742 kHz.
This function allows you to lock the keypad while your Flipper Zero is scanning for signals. To lock the keypad, in the Configuration Menu, select Lock Keyboard and press :ok:OK.
Flipper Zero can send saved signals that are recorded at frequencies that are allowed for transmission in your region. To send a saved signal with Flipper Zero, do the following:
- Go to Main Menu → Sub-GHz → Saved.
- Select the signal, then press Emulate.
- Press Send to send the saved signal.
To learn more about regions and allowed transmitting frequencies, visit the Frequencies page.
