What is the problem?
Print starts fine, after several hours, the printer stops, octoprint is still up but says disconnected and will not re-connect. I know I have seen a post on this before, but my searches have turned up nothing.
What did you already try to solve it?
Replaced the USB cable with a new one, used a fresh install of octopi 0.17.0 on my Rpi3B+, verified power to the Pi and printer, ran my Anet A8 off this pi as well after the ender 3 issue and the anet runs just fine, no timeouts, nothing.
Copied gcode file from Pi to SD card and Ender 3 printed the file just fine
Logs (octoprint.log, serial.log or output on terminal tab at a minimum, browser error console if UI issue ... no logs, no support!)
2020-02-27 22:09:46,773 - octoprint.server.heartbeat - INFO - Server heartbeat <3
2020-02-27 22:24:46,776 - octoprint.server.heartbeat - INFO - Server heartbeat <3
2020-02-27 22:39:46,778 - octoprint.server.heartbeat - INFO - Server heartbeat <3
2020-02-27 22:54:46,781 - octoprint.server.heartbeat - INFO - Server heartbeat <3
2020-02-27 23:09:46,784 - octoprint.server.heartbeat - INFO - Server heartbeat <3
2020-02-27 23:24:46,787 - octoprint.server.heartbeat - INFO - Server heartbeat <3
2020-02-27 23:33:43,102 - octoprint.util.comm - INFO - Got a resend request from the printer: requested line = 43268, current line = 43270
| Last lines in terminal:
| Send: N43261 G1 X134.327 Y81.172 E1491.66868*102
| Recv: ok
| Send: N43262 G1 X134.391 Y81.16 E1491.66998*85
| Recv: ok
| Send: N43263 G1 X134.462 Y81.162 E1491.6714*81
| Recv: ok
| Send: N43264 G1 X135.746 Y81.774 E1491.69978*110
| Recv: T:199.97 /200.00 B:60.28 /60.00 @:63 B@:0
| Recv: ok
| Send: N43265 G0 F7200 X135.695 Y82.52*77
| Recv: ok
| Send: N43266 G1 F1800 X134.604 Y81.43 E1491.73056*56
| Recv: ok
| Send: N43267 G0 F7200 X134.132 Y81.523*116
| Recv: ok
| Send: N43268 G1 F1800 X135.743 Y83.135 E1491.77604*2
| Recv: Error:No Line Number with checksum, Last Line: 43267
| Send: N43269 G0 F7200 X135.507 Y83.464*121
| Recv: Error:Line Number is not Last Line Number+1, Last Line: 43267
| Recv: Resend: 43268
2020-02-27 23:39:43,101 - octoprint.util.comm - INFO - Communication timeout while printing, trying to trigger response from printer.
2020-02-27 23:39:43,129 - octoprint.util.comm - INFO - Got a resend request from the printer: requested line = 51405, current line = 51407
| Last lines in terminal:
| Recv: ok
| Send: N51399 G1 X135.1 Y128.617 E1665.657*88
| Recv: ok
| Send: N51400 G1 X134.321 Y129.614 E1665.68225*82
| Recv: ok
| Send: N51401 G1 X133.333 Y130.779 E1665.71273*94
| Recv: ok
| Send: N51402 G1 X132.314 Y131.868 E1665.74249*91
| Recv: ok
| Send: N51403 G1 X131.2 Y132.949 E1665.77347*80
| Recv: ok
| Send: N51404 G1 X130.043 Y133.966 E1665.80421*80
| Recv: ok
| Send: N51405 G1 F1800 E1664.80421*51
| Recv: T:200.07 /200.00 B:60.22 /60.00 @:65 B@:0
| Recv: T:200.00 /200.00 B:60.24 /60.00 @:66 B@:0
| Communication timeout while printing, trying to trigger response from printer. Configure long running commands or increase communication t
imeout if that happens regularly on specific commands or long moves.
| Send: N51406 M105*33
| Recv: Error:Line Number is not Last Line Number+1, Last Line: 51404
| Recv: Resend: 51405
Additional information about your setup (OctoPrint version, OctoPi version, printer, firmware, browser, operating system, ... as much data as possible)
OctoPrint 1.3.12 running on OctoPi 0.17.0
Factory Firmware (1.1.6.2)