ETHOS multi-module protocol list

An up-to-date main.lua for the FrSky multi-module (MULTI / DIY-Multiprotocol-TX-Module) on ETHOS radios (e.g. FrSky X20PRO AW).

FrSky's stock list (ETHOS-Feedback-Community) lags the firmware, so newer protocols are missing. This main.lua adds them and keeps the sub-protocol (variant) lists, options, failsafe flags and channel limits current with the upstream firmware:

• pascallanger/DIY-Multiprotocol-TX-Module

Install

Copy main.lua onto the radio's SD card, replacing the existing file in the multi module folder (the same place FrSky ships it — under scripts/modules/multi/), then restart the radio. Confirm the path matches your ETHOS version's existing install.

The list only exposes protocols in ETHOS — a protocol still has to be compiled into your module's MULTI firmware to actually bind. If a protocol won't bind, flash the latest MULTI firmware.

What's different from FrSky's 1.6 list

Changes are tagged inline in main.lua:

• -- [NEW] — protocol added (e.g. FrSky R9, SGF22, Scorpio, BlueFly, UDIRC, WPL, …)
• -- [UPD] — variant/option list brought up to date (e.g. AFHDS 2A gyro modes, DSM DSMR/DSM2-SFC, RadioLink RC4G, XK Cars, …)

Module options (Bind on channel / Disable telemetry / Low power)

The firmware honors Low power and Bind on channel for every transmitting protocol (they're read before the protocol is even selected), and Disable telemetry globally. FrSky's stock list only exposed these on a few protocols, so they're added to all transmitting protocols here — the receiver/scanner pseudo-protocols (Frsky_RX, Flysky AFHDS2A RX, Bayang RX, DSM_RX, Scanner) are skipped. Protocol-specific options (RF tune, servo rate, etc.) and failsafe flags are preserved.

Staying in sync with upstream automatically

tools/sync_protocols.py compares main.lua against the upstream firmware's protocol enum (Multiprotocol.h) and display list (Multi.txt) and adds any protocols that are missing. main.lua stays the hand-curated source of truth — the script only appends new entries (tagged -- [auto-added]), so curated names, options and failsafe flags are never overwritten.

python tools/sync_protocols.py          # add any missing protocols to main.lua
python tools/sync_protocols.py --check  # report only; exit 1 if out of date

The sync-upstream GitHub Action runs the script daily and commits any newly-added protocols. (GitHub can't trigger a build the instant an upstream repo changes — you can only watch a repo you don't own on a schedule — so this polls once a day. Use the Run workflow button on the Actions tab to sync on demand.)

When the bot adds a protocol it's a best-effort entry (name + variants from upstream). Review the -- [auto-added] line afterwards to add any options, failsafe flag or maxChannels the new protocol needs.

Sources

• Protocol numbers: Multiprotocol/Multiprotocol.h (upstream PROTO_xxx enum)
• Names & sub-protocols: Multiprotocol/Multi.txt
• Per-protocol details (channels, telemetry, failsafe): Protocols_Details.md