Title: Supported Protocols
Description: Reference for SubGHz protocols decoded by GhostESP
URL: /v2.1/subghz/protocols/
Version: v2.1
Section: SubGHz
Search index: /search-index.json

# Supported Protocols

> Reference for SubGHz protocols decoded by GhostESP

## On this page

- [Decoded protocols](#decoded-protocols)
- [Princeton](#princeton)
- [CAME](#came)
- [Nice Flo](#nice-flo)
- [Nice Flor S](#nice-flor-s)
- [PT2260 / PT2262](#pt2260--pt2262)
- [Chamberlain](#chamberlain)
- [Linear](#linear)
- [KeeLoq](#keeloq)
- [Holtek](#holtek)
- [FAAC SLH](#faac-slh)
- [Alutech AT-4N](#alutech-at-4n)
- [Marantec](#marantec)
- [Unilarm](#unilarm)
- [Gangqi](#gangqi)
- [Doitrand](#doitrand)
- [Gate TX](#gate-tx)
- [Ansonic](#ansonic)
- [Bett](#bett)
- [Clemsa](#clemsa)
- [Dickert MAHS](#dickert-mahs)
- [Dooya](#dooya)
- [Elplast](#elplast)
- [Marantec24](#marantec24)
- [Hollarm](#hollarm)
- [Hay21](#hay21)
- [Feron](#feron)
- [Roger](#roger)
- [Treadmill37](#treadmill37)
- [KeyFinder](#keyfinder)
- [Nord ICE](#nord-ice)
- [Raw signal fallback](#raw-signal-fallback)
- [Protocol detection](#protocol-detection)
- [Notes](#notes)
- [Troubleshooting](#troubleshooting)

---

GhostESP automatically attempts to decode captured signals using 30+ common SubGHz protocols. When a signal is successfully decoded, it can be reconstructed and transmitted reliably.
## Decoded protocols
### Princeton
- Common use: Garage door remotes, wireless sensors
- Frequency: 315 MHz, 433.92 MHz
- Bit length: 24 bits
- Encoding: Manchester-like with specific timing
### CAME
- Common use: Gate and garage door remotes
- Frequency: 433.92 MHz
- Bit length: 12, 18, 24, 25, or 42 bits
- Variants: CAME, CAME Atomo
### Nice Flo
- Common use: Nice brand gate openers
- Frequency: 433.92 MHz
- Bit length: 12 or 24 bits
### Nice Flor S
- Common use: Nice brand gate systems
- Frequency: 433.92 MHz
- Bit length: 52 or 76 bits
### PT2260 / PT2262
- Common use: Generic remote controls, alarm sensors
- Frequency: 315 MHz, 433.92 MHz
- Bit length: 12-24 bits
- Encoding: Simple address/data format
### Chamberlain
- Common use: Chamberlain garage door openers
- Frequency: 315 MHz, 390 MHz
- Bit length: 7-9 bits
- Note: Some models use rolling codes
### Linear
- Common use: Linear brand gate operators
- Frequency: 310 MHz, 315 MHz, 390 MHz
- Bit length: 10 bits (Linear), 8 bits (Linear D3)
- Variants: Linear, Linear Delta3
### KeeLoq
- Common use: Secure garage door and vehicle remotes
- Frequency: 315 MHz, 433.92 MHz, 868 MHz
- Bit length: 64 bits
- Note: Uses rolling code encryption; replay may fail
### Holtek
- Common use: Holtek-based remote controls
- Frequency: 433.92 MHz
- Bit length: 40+ bits (Holtek), 12 bits (Holtek HT12X)
- Variants: Holtek, Holtek HT12X
### FAAC SLH
- Common use: FAAC gate automation systems
- Frequency: 433.92 MHz
- Bit length: 64 bits
### Alutech AT-4N
- Common use: Alutech gate systems
- Frequency: 433.92 MHz
- Bit length: 72 bits
### Marantec
- Common use: Marantec garage door openers
- Frequency: 868 MHz
- Bit length: 49 bits
### Unilarm
- Common use: Alarm systems
- Frequency: 433.92 MHz
- Bit length: 25 bits
### Gangqi
- Common use: Asian market remotes
- Frequency: 433.92 MHz
- Bit length: 34 bits
### Doitrand
- Common use: Various remote controls
- Frequency: 433.92 MHz
- Bit length: 37 bits
### Gate TX
- Common use: Generic gate transmitters
- Frequency: 433.92 MHz
- Bit length: 24 bits
### Ansonic
- Bit length: 12 or 24 bits
- Encoding: Fixed-code DIP-style encoding
### Bett
- Bit length: 18 bits
- Encoding: Fixed-code DIP-style encoding
### Clemsa
- Bit length: 18 bits
- Encoding: Fixed-code DIP-style encoding
### Dickert MAHS
- Bit length: 36 bits
- Decoded fields: Factory code and user code
### Dooya
- Bit length: 40 bits
- Decoded fields: Serial number, channel, and button
### Elplast
- Bit length: 18 bits
- Encoding: Fixed-code DIP-style encoding
### Marantec24
- Bit length: 24 bits
- Decoded fields: Serial number and button
### Hollarm
- Bit length: 42 bits
- Decoded fields: Serial number, button, and checksum
### Hay21
- Bit length: 21 bits
- Decoded fields: Serial number, button, and counter
### Feron
- Bit length: 32 bits
- Decoded fields: Serial number and command
### Roger
- Bit length: 28 bits
- Decoded fields: Serial number and button
### Treadmill37
- Bit length: 37 bits
- Decoded fields: Serial number and button
### KeyFinder
- Bit length: 24 bits
- Decoded fields: Serial number and device ID
### Nord ICE
- Bit length: 33 bits
- Decoded fields: Serial number and button
## Raw signal fallback
If a signal cannot be decoded with any known protocol, GhostESP saves it as raw timing data. Raw captures can still be transmitted but:
- Require cleaner captures for reliable replay
- Are more sensitive to timing and environmental factors
- Cannot be edited or modified as easily as decoded signals
## Protocol detection
GhostESP uses a stream decoder engine that tests captured signals against all supported protocols simultaneously. When a protocol matches with sufficient confidence, the signal is decoded and the protocol name, bit count, and decoded code are displayed.
## Notes
- Protocol detection is automatic; no manual selection is required.
- Some protocols share similar timing; detection may not always be 100% accurate.
- Rolling code protocols (like some KeeLoq implementations) can be decoded but may not replay successfully due to counter synchronization.
- New protocols can be added to the decoder engine by updating the firmware.
## Troubleshooting
- Wrong protocol detected: If the decoded protocol doesn’t match your device, try raw capture mode.
- Decode fails: Ensure the signal capture is clean and complete. Move closer to the target device.
- Replay fails on decoded signal: The device may use rolling codes or additional security measures.