Hit on the bench: mint-mac has no pyserial, and `pip install pyserial` is
refused outright by PEP 668 (externally-managed-environment) on Mint 22 /
Ubuntu 24.04 / Debian 12. A field diagnostic that needs a pip install on a
locked-down host is one you cannot run at the moment you need it -- which is
exactly when this tool is for.
Replaced minimateplus.SerialTransport with a ~30-line stdlib `termios` port,
the same approach bridges/mm_link.py and scratch/fake_unit.py already take in
this repo. Runs on a stock Python 3 anywhere.
Not a general SerialTransport replacement: no flow control, no parity options,
Linux/macOS only. Enough for a Micromate, which is 8N1 with no handshaking.
Verified end to end against a fake unit on a pty, dribbling responses in
64-byte pieces: 194 reads for 10,958 B, identity/state/setup-walk all correct,
and a 4,076 B event downloaded across 4 chunks at the exact expected length.
Also clarified --baud in the help: it applies to the USB-A/FTDI path, and is
ignored by the USB-B "PC" port, which is CDC-ACM and negotiates its own rate.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Ru8Lg9HkkYvX9VWWo65SmL
serversdownandClaude Opus 5
f7d9a1d9cb