SubGhzD (Sub-GHz Decoder) is a passive receiver app for decoding OOK/AM sub-GHz remote control signals from gate remotes, garage door openers, doorbells, home automation devices, and similar ISM-band transmitters. It identifies the protocol and displays decoded data in a scrolling list.
Settings
- Frequency: Default is 433.92 MHz. Adjustable via the encoder knob or on-screen numpad for other ISM bands (e.g., 315 MHz, 868 MHz).
- RF Amp (0 or 1): Enables/disables the internal RF amplifier. Use with care on strong signals.
- LNA gain (0–40): Low-noise amplifier gain. See Receive Quality Issues.
- VGA gain (0–62): Variable-gain amplifier gain. See Receive Quality Issues.
- Clear: Clears the decoded signal list from the screen. Does not affect the log file.
- Log: When checked, decoded packets are written to a timestamped CSV file on the SD card:
LOGS/SUBGHZDLOG_YYYYMMDD_HHMMSS.CSV. The file header is; Type; Bits; Data;.
Decoded Signal List
Each decoded packet appears as a row with three columns: Type (protocol name), Bits (frame bit length), and Age (seconds since last received). The list deduplicates by signal content — repeated transmissions from the same remote update the age counter rather than adding new rows.
Selecting a row opens a detail view showing the protocol type, serial number, button code, counter value, and any additional decoded fields for that protocol. For KeeLoq signals a Save button appears, which saves the decoded remote data to KEELOQREMOTES/.KEELOQ on the SD card for use with the KeeLoq TX app.
Supported Protocols
44 protocols are currently implemented, covering fixed-code and some rolling-code (KeeLoq) systems across the 300–868 MHz ISM bands:
Princeton, Bett, CAME, CAME Atomo, CAME Twee, Chamberlain Code, Clemsa, Doitrand, Dooya, FAAC, Gate TX, Holtek, Holtek HT12X, Holtek HT6P20B, Honeywell, Honeywell WDB, Hörmann, IDO, Intertechno V3, KeeLoq, Kingates Stylo 4K, Linear, Linear Delta 3, Magellan, Marantec, Marantec24, Mastercode, Megacode, Nero Radio, Nero Sketch, Nice FLO, Nice FLO RS, Phoenix V2, Power Smart, Security+ V1, Security+ V2, SMC5326, Somify Keytis, Somify Telis, Star Line, X10, Legrand, Gangqi, Restaurant Pager.
Note: Hörmann BiSecure (FM-based) is recognized but not implemented in this app as it requires FM demodulation.
Settings Persistence
The Log checkbox state is saved to rx_subghzd.ini on the SD card when App Settings is enabled in the global Settings menu.