DongLoRa Mux (Python)

USB multiplexer daemon — lets multiple applications share one DongLoRa dongle simultaneously. Speaks the DongLoRa Protocol v2 wire protocol (see PROTOCOL.md).

What It Does

• Owns the USB serial connection exclusively (flock-protected).
• Exposes a Unix domain socket and optional TCP listener speaking the DongLoRa Protocol v2 frame format.
• Tag-correlated solicited responses — concurrent commands from multiple clients are routed back to the originator via a mux-allocated device-tag map (PROTOCOL.md §13.6).
• RX fan-out — every over-the-air RX is broadcast to all clients.
• TX loopback (§13.4) — a successful TX from one client is delivered to every other client as an RX event with origin = LOCAL_LOOPBACK.
• Smart SET_CONFIG arbitration (§13.2) — the first successful call locks the config; cross-client calls get ALREADY_MATCHED / LOCKED_MISMATCH with the lock owner's params echoed. A single connected client can still retune freely (scanner mode).
• RX_START / RX_STOP ref-counting — the radio stays in RX as long as any client wants it.

Running

just run                            # start the mux daemon
just verbose                        # start with verbose logging
just run --tcp 5741 --port /dev/ttyACM0   # with options

Depends On

• donglora (>= 1.0) — the Python client library. Provides the wire-level frame codec, event parsers, and USB discovery helpers this mux is built on.

Relationship to donglora-mux (Rust)

This package is a Python port of the Rust donglora-mux daemon. The two implementations are functionally equivalent — they speak the same DongLoRa Protocol v2 wire protocol, implement the same §13.2 / §13.4 multi-client semantics, and are drop-in interchangeable in front of the same dongle. Pick whichever fits your ops environment:

• Rust (cargo install donglora-mux) — single binary, no runtime deps, ~5 MB release build. Better for production / embedded Linux.
• Python (pip install donglora-mux) — easy to hack on, integrates with a Python toolchain, useful when Rust isn't an option.

If you find a behavioural divergence between the two, that's a bug — please file it.