Uh... Throwing junk at the wall: Have you tried just using an alarm to break out of a hung state?
I know windows is excruciatingly bad at that, but It may help 🤷‍♂️

In reply to Re: Win32::SerialPort - How do I detect if device is still connected? by The_Dj
in thread Win32::SerialPort - How do I detect if device is still connected? by petro4213

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