Octoprint random disconnect with Alfawise u30

Get Help
1

Hi,
octoprint is always disconnecting from the printer. my printer is an alfawise u30. i tried with a lot of usb cables but it always disconnect. the power supply is ok. please help me

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:2823
Please see https://faq.octoprint.org/serialerror for possible reasons of this.
Changing monitoring state from "Printing" to "Offline (Error: SerialException: 'device reports readiness to read but returned no data (device disconnected or multiple access on port?)' @ comm.py:_readline:2823)"
Connection closed, closing down monitor

2
  • Verify that the Pi has the correct 5V @ 2.5A power adapter (not a charger) and that the microUSB connection fits firmly
  • Verify that the wall outlet is providing the expected voltage or plug all this into a UPS
  • Verify that the serial cable is as short as possible, that you're not adding extra adapters inline, that the serial cable itself includes internal metallic shielding or a ferrite core and that both ends fit snugly
  • Verify that the printer board is both plugged in and powered ON
  • Verify that the Pi isn't sinking 5V power over to the printer board which might lower its own voltage
  • Research to see if others with your printer and firmware are having the same problem
3

After homing the printer immediately disconnects Error min extrude temp below min or words to that effect.

4

That's an error reported by your firmware due to the hotend being too cold. That has nothing to do with OctoPrint.