“Driver missing,” Alex muttered.
The LED blinked twice — then stayed solid green.
Alex’s workbench was cluttered with cables, half-drunk coffee, and one stubborn device: a USB LMC-V1 interface module. Its LED blinked twice on plug-in, then faded to black. No “ding” from Windows. No COM port. Just silence.
Then Alex found a dusty forum post from 2016. A field technician in Germany wrote: “LMC-V1 uses a proprietary VID/PID (04D2/5001). Force install the ‘USB Serial Converter’ driver from Windows Update Catalog — but only version 6.7.10.”