Add FRED programming via Z21 LAN DISPATCH_ADDR - #4
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Introduce wp-link Z21 client (mDNS _z21._udp plus UDP serial probe), driver fred (one DCC address, no Soft-AP), scan --mode z21, and runtime UDP dispatch without joining a programming AP. Co-authored-by: Cursor <cursoragent@cursor.com>
7 tasks
Resolve hostnames via async DNS, send LAN_LOGOFF on dispatch errors, preserve manually cached Z21 keys across rescans, map unreachable to a stable job detail, and add runtime tests for noAck and z21NoLocoNet. Co-authored-by: Cursor <cursoragent@cursor.com>
Co-authored-by: Cursor <cursoragent@cursor.com>
Co-authored-by: Cursor <cursoragent@cursor.com>
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Summary
wp-link/z21): framing, serial probe,LAN_LOCONET_DISPATCH_ADDR, mDNS_z21._udpplus UDP broadcast discovery on 21105/21106.freddriver (one DCC address 1..=10239, no Wi‑Fi/throttle server) and runtime path that programs over UDP without joining a Soft-AP.scan --mode z21, relaxprogramCLI flags forfred, fake UDP Z21 tests, and driver/docs updates.Test plan
cargo test --workspaceinwireless-programmerwireless-programmer scan --mode z21against a physical Z21 on the layout LANwireless-programmer program --driver fred --key host:port --roster-file …with FRED in LocoNet jackdispatchFailed/z21NoLocoNet/noAckas documented