Communications error .. as soon as I hit "Print"

I recently resumed printing and had to replace my Pi2 for Pi3+ I updated to the following
octo 1.40 octopi 0.170
Prusa Mk2s firmware 3.2.3
I replaced the power supply and tried to reboot the pi and printer .. any suggestions would be usefull
thanks
D.Rothman

If I heat the "Preheat" button . I don't have an issue but as soon as I hit print .. printiing stops with an error message:
end: N1 M117 ETA: -98
Recv: Error:No Checksum with line number, Last Line: 0
Recv: Resend: 1
Printer keeps requesting line 1 again and again, communication stuck
Changing monitoring state from "Starting" to "Error: Printer keeps requesting line 1 again and again, communication stuck"
Send: M112
Send: N2 M112
35
Send: N3 M104 T0 S034
Send: N4 M140 S0
97
Changing monitoring state from "Error: Printer keeps requesting line 1 again and again, communication stuck" to "Offline (Error: Printer keeps requesting line 1 again and again, communication stuck)"
Connection closed, closing down monitor
Closing down send loop

| Send: N1 M117 ETA: -*98
| Recv: Error:No Checksum with line number, Last Line: 0
| Recv: Resend: 1
2020-04-19 21:49:25,178 - octoprint.util.comm - WARNING - Printer keeps requesting line 1 again and again, communication stuck
2020-04-19 21:49:25,180 - octoprint.util.comm - INFO - Changing monitoring state from "Starting" to "Error: Printer keeps requesting line 1 again and again, communication stuck"
2020-04-19 21:49:25,183 - octoprint.util.comm - INFO - Force-sending M112 to the printer
2020-04-19 21:49:25,198 - octoprint.util.comm - INFO - Changing monitoring state from "Error: Printer keeps requesting line 1 again and again, communication stuck" to "Offline (Error: Printer keeps requesting line 1 again and again, communication stuck)"
2020-04-19 21:49:25,545 - octoprint.plugins.tracking - INFO - Sent tracking event print_started, payload: {'origin': u'local', 'file': '850bd57a1700e5929203aecd15793fdc9eb24972'}
2020-04-19 21:49:25,706 - octoprint.util.comm - INFO - Firmware didn't send an 'ok' with their resend request. That's a known bug with some firmware variants out there. Simulating an ok to continue...
2020-04-19 21:49:29,280 - octoprint.plugins.discordremote - INFO - Transformations : FlipH=True, FlipV=True Rotate=False
2020-04-19 21:49:30,397 - octoprint.plugins.octohue - INFO - Received Configured Status Event: PrintStarted

Disable the ETA plugin, it's sending messages incompatible to your printer's firmware (that : is making it hiccup)

1 Like

thanks .. I'll try that as soon as this job is finished !

it worked .... thanks for the assist