Alan-Jowett / sonde / 23477546911

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Build Type

push

github

Committed by web-flow

Commit Message

fix(gateway): reconnect on modem serial disconnect (#450)

* docs(gateway): serial disconnect recovery in spec trifecta

Requirements (GW-1103):
- Add criteria 3-5: serial disconnect triggers reconnection with
  exponential backoff, gateway resumes after \MODEM_READY\, process
  does not exit on transient USB-CDC disconnects.

Design (§4.2):
- Document serial disconnect recovery: backoff loop, startup
  re-execution, channels remain open during reconnection.

Validation:
- Add T-1104a: serial disconnect → reconnection with backoff.
- Add T-1104b: frame loop survives reconnection.

Fixes #442.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fix(gateway): reconnect on modem serial disconnect (GW-1103)

Wrap the modem transport construction + frame/BLE processing loops in
a retry loop with exponential backoff (1s → 30s cap).  When the serial
reader task exits due to USB-CDC disconnect (OS error 995), the gateway
logs a warning and attempts to reopen the port and re-execute the
modem startup sequence instead of exiting.

The gRPC admin server is recreated each iteration with the new
transport reference.  Shutdown signal breaks the outer loop cleanly.

Fixes #442.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fix: clippy redundant_closure_call in serial port open

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

---------

Co-authored-by: Alan Jowett <alan.jowett@microsoft.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Coverage Stats

0 of 135 new or added lines in 1 file covered. (0.0%)

2 existing lines in 1 file now uncovered.

21450 of 25017 relevant lines covered (85.74%)

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