I have been using my Octoprint to my Creality 10 Max for some years without any problem. Today then I start the printer up Octoprint can't connect. The printer starts fine and Ocroprint too, but then I click "Connection" in Octoprint I got this error:
Changing monitoring state from "Offline" to "Detecting serial connection"
Performing autodetection with 0 port/baudrate candidates:
Changing monitoring state from "Detecting serial connection" to "Error"
Changing monitoring state from "Error" to "Offline after error"
I have tried to restart both printer and Octoprint several time. Also have restarted in safe mode from Octprint but same issue. Before printer always restarted then I attached the cable between Octoprint and printer, but not now.
Have you tried running in safe mode?
Yes
Did running in safe mode solve the problem?
No
Systeminfo Bundle
browser.user_agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.131 Safari/537.36
connectivity.connection_check: 1.1.1.1:53
connectivity.connection_ok: false
connectivity.enabled: true
connectivity.online: false
connectivity.resolution_check: octoprint.org
connectivity.resolution_ok: false
env.hardware.cores: 4
env.hardware.freq: 1500
env.hardware.ram: 1979641856
env.os.bits: 32
env.os.id: linux
env.os.platform: linux2
env.plugins.pi_support.model: Raspberry Pi 4 Model B Rev 1.1
env.plugins.pi_support.octopi_version: 0.17.0
env.plugins.pi_support.throttle_state: 0x0
env.python.pip: 19.3.1
env.python.version: 2.7.16
env.python.virtualenv: true
octoprint.safe_mode: false
octoprint.version: 1.6.1
systeminfo.generator: systemapi