Serial communication stops after long periods.

[-dev]

There is a known Windows bug with USB "unexpected disconnects".  One of the members here actually registered a bug report with MS and linked to his video demonstrating it.  Seems like it was supposed to be fixed in Windows 8 or 10, IIRC.  It was specifically stated that it would not be fixed in earlier versions.

Perhaps the power surge/sag affects some part of the USB hardware chain, and it "looks" like a disconnect.  In which case, filtering the power through a UPS or isolation transformer should fix it.

For others with similar symptoms, be sure you're not having a millis rollover problem instead.

Cheers,
/dev

[jorgemarmo]

Hi there... same problem here with a chinese nanoV3 clone using the CH340

First of all, me move out last year, on the previous house I did a long log with the arduino, I don't recall any issue.
On the new house, I'm trying to do some recordings, so I put a laptop PC to log the arduino... connection lost after ~2 hours... I thought this might be a USB energy saving problem or something related. But then I change the laptop for a RaspberryPi 3 (under raspbian, the last one to the date) and same problem happened over and over again... time interval for interruption is not fix, but is in the 2 hours order.

And cherry on top, the arduino, the RPi or the laptop, are plugged on the same socket as a refrigerator! what are the odds?

I don't have the time right now, but I'll try to correlate the connection loss with the fridge turning on/off....

[jorgemarmo]

Hi there,

For anyone reading this topic.... a minor update:
I burnt my code into the same nano clone, WITHOUT the bootloader, (using another nano as ISP programmer) and it seems to fix the problem... no more sudden stops.

[aarg]

Is it my imagination, or has there been a general increase in exhuming several years old threads lately?