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docs(series4): the bench cable was confirmed a Benfei (Prolific)

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Closes the identification chain: firmware has no Prolific driver, a laptop
answers on that cable where the Micromate does not, lsusb reported PL2303,
purchasing history shows both FTDI and Prolific cables in circulation, and the
physical cable on the bench is a Benfei.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Ru8Lg9HkkYvX9VWWo65SmL
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serversdown
2026-09-25 20:55:18 -04:00
co-authored by Claude Opus 5
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docs/micromate_protocol_reference.md
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@@ -2111,6 +2111,9 @@ So both types are in circulation and indistinguishable by eye. A unit handed th
wrong one has no working modem port, and nothing about the cable's appearance
says so.
**The cable on the bench during this investigation was confirmed to be a Benfei**
— the Prolific one.
⚠ **Identify cables by chipset, not by looks.** `lsusb` on any Linux box:
FTDI is VID `0403`, Prolific is `067b`. Note also that counterfeit FTDI chips
are common in cheap cables — they carry FTDI's VID but may not behave like one,