UART boards (CP2102 bridge) keep the serial port alive across ESP32 resets,
so the mux never detected the board rebooting. Now the writer sends a
keepalive Ping every 5s of idle and declares the dongle lost after a
2s timeout.
On reconnect, saved radio config and RX state are re-sent to the dongle
so connected clients continue working without re-establishing state.
The mux now acquires an flock-based exclusive lock on the serial port
before opening it. This prevents bridges or other processes from directly
opening the same device while the mux owns it. The lock is held for the
duration of the dongle session and auto-released on disconnect or crash.
Add donglora-client (clients/rust/) and donglora-mux (mux/rust/) as
Rust implementations of the existing Python client library and mux
daemon. Both are standalone Cargo projects with no-panic guarantees
enforced by clippy deny lints.
donglora-client provides protocol types, COBS framing, USB device
discovery, serial/mux transports, and a high-level Client<T> with
send/recv. donglora-mux is a fully async (tokio) multiplexer daemon
with dongle hot-plug reconnect, per-client bounded send queues,
SetConfig locking, and StartRx/StopRx reference counting.
52 unit tests across both crates. Updates README roadmap checkboxes
and CONTRIBUTING docs to reflect the new implementations.
swaits