hi i ave octoprint on raspbery pi3 atched to my printer (anet a6). some time of printing everything goes ok , and if print is more then few hours long serial port fails (serial exeption or smth like that) . i use 115200. baudrate. (faster doesnt work) also I use usb webcam attached to it. sometimes i get image of camera , sometimes i have to reboot it to work.
my guess is newer version or some updates has some problem with long work of serial port ...
ps. serial log with exact error will add to post later
Check for an under-voltage condition on your power supply. Verify that your serial cable has an internal metallic shielding or a ferrite core.
log :*019-10-03 00:10:24,259 - Recv: ok T:139.5 /0.0 B:9.0 /0.0 T0:139.5 /0.0 @:0 B@:0
2019-10-03 00:10:24,542 - Unexpected error while reading serial port, please consult octoprint.log for details: SerialException: 'device reports readiness to read but returned no data (device disconnected or multiple access on port?)' @ comm.py:_readline:2739
2019-10-03 00:10:24,587 - Please see https://faq.octoprint.org/serialerror for possible reasons of this.
2019-10-03 00:10:24,595 - Changing monitoring state from "Operational" to "Offline (Error: SerialException: 'device reports readiness to read but returned no data (device disconnected or multiple access on port?)' @ comm.py:_readline:2739)"
2019-10-03 00:10:24,765 - Connection closed, closing down monitor *
and yes I octoprint shows undervoltage constantly .
Fix that. Undervoltage = weird issues, among which are serial issues. Which it also tells you in the linked faq entry as the very first point:
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changed usb cable for shorter and better one and no more undervoltage icon apears . will se if serial errors happen again ( wich they dont)
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