Thanks for the suggestion, @Ewald_Ikemann. I’ve installed PortLister, but it doesn’t seem to do the trick: I still don’t see the port in the list.
This is the latest part of octoprint.log:
2020-11-14 18:12:01,307 - octoprint.plugins.tracking - INFO - Sent tracking event commerror_autodetect, payload: {'commerror_text': u'No more candidates to test, and no working port/baudrate combination detected.'}
2020-11-14 18:11:22,812 - octoprint.startup - INFO - ******************************************************************************
2020-11-14 18:11:22,814 - octoprint.startup - INFO - Starting OctoPrint 1.4.2
2020-11-14 18:11:22,815 - octoprint.startup - INFO - ******************************************************************************
2020-11-14 18:11:23,680 - octoprint.util.connectivity.connectivity_checker - INFO - Connectivity state is currently: offline
2020-11-14 18:11:23,681 - octoprint.util.connectivity.connectivity_checker - INFO - Connecting to 8.8.8.8:53 is not working
2020-11-14 18:11:23,682 - octoprint.util.connectivity.connectivity_checker - INFO - Resolving octoprint.org is not working
2020-11-14 18:11:23,691 - octoprint.startup - INFO - We don't appear to be online, not fetching plugin blacklist
2020-11-14 18:11:23,764 - octoprint.plugin.core - INFO - Loading plugins from /home/pi/oprint/lib/python2.7/site-packages/octoprint/plugins, /home/pi/.octoprint/plugins and installed plugin packages...
2020-11-14 18:11:26,372 - octoprint.plugin.core - INFO - Found 28 plugin(s) providing 28 mixin implementations, 50 hook handlers
2020-11-14 18:11:26,536 - octoprint.server.heartbeat - INFO - Starting server heartbeat, 900.0s interval
2020-11-14 18:11:26,676 - octoprint.server - INFO - Intermediary server started
2020-11-14 18:11:26,677 - octoprint.plugin.core - INFO - Loading plugins from /home/pi/oprint/lib/python2.7/site-packages/octoprint/plugins, /home/pi/.octoprint/plugins and installed plugin packages...
2020-11-14 18:11:26,860 - octoprint.plugin.core - INFO - Found 28 plugin(s) providing 28 mixin implementations, 50 hook handlers
2020-11-14 18:11:26,918 - octoprint.filemanager.storage - INFO - Initializing the file metadata for /home/pi/.octoprint/uploads...
2020-11-14 18:11:26,920 - octoprint.filemanager.storage - INFO - ... file metadata for /home/pi/.octoprint/uploads initialized successfully.
2020-11-14 18:11:26,925 - octoprint.server - INFO - Added new permission from plugin action_command_notification: PLUGIN_ACTION_COMMAND_NOTIFICATION_SHOW (needs: u"Need(method='role', value=u'plugin_action_command_notification_show')")
2020-11-14 18:11:26,926 - octoprint.server - INFO - Added new permission from plugin action_command_notification: PLUGIN_ACTION_COMMAND_NOTIFICATION_CLEAR (needs: u"Need(method='role', value=u'plugin_action_command_notification_clear')")
2020-11-14 18:11:26,928 - octoprint.server - INFO - Added new permission from plugin action_command_prompt: PLUGIN_ACTION_COMMAND_PROMPT_INTERACT (needs: u"Need(method='role', value=u'plugin_action_command_prompt_interact')")
2020-11-14 18:11:26,929 - octoprint.server - INFO - Added new permission from plugin announcements: PLUGIN_ANNOUNCEMENTS_READ (needs: u"Need(method='role', value=u'plugin_announcements_read')")
2020-11-14 18:11:26,931 - octoprint.server - INFO - Added new permission from plugin announcements: PLUGIN_ANNOUNCEMENTS_MANAGE (needs: u"Need(method='role', value=u'plugin_announcements_manage'), Need(method='role', value=u'plugin_announcements_read')")
2020-11-14 18:11:26,933 - octoprint.server - INFO - Added new permission from plugin appkeys: PLUGIN_APPKEYS_ADMIN (needs: u"Need(method='role', value=u'plugin_appkeys_admin')")
2020-11-14 18:11:26,935 - octoprint.server - INFO - Added new permission from plugin backup: PLUGIN_BACKUP_ACCESS (needs: u"Need(method='role', value=u'plugin_backup_access')")
2020-11-14 18:11:26,936 - octoprint.server - INFO - Added new permission from plugin firmware_check: PLUGIN_FIRMWARE_CHECK_DISPLAY (needs: u"Need(method='role', value=u'plugin_firmware_check_display')")
2020-11-14 18:11:26,938 - octoprint.server - INFO - Added new permission from plugin logging: PLUGIN_LOGGING_MANAGE (needs: u"Need(method='role', value=u'plugin_logging_manage')")
2020-11-14 18:11:26,940 - octoprint.server - INFO - Added new permission from plugin pi_support: PLUGIN_PI_SUPPORT_STATUS (needs: u"Need(method='role', value=u'plugin_pi_support_check')")
2020-11-14 18:11:26,941 - octoprint.server - INFO - Added new permission from plugin pluginmanager: PLUGIN_PLUGINMANAGER_MANAGE (needs: u"Need(method='role', value=u'plugin_pluginmanager_manage')")
2020-11-14 18:11:26,943 - octoprint.server - INFO - Added new permission from plugin pluginmanager: PLUGIN_PLUGINMANAGER_INSTALL (needs: u"Need(method='role', value=u'plugin_pluginmanager_install'), Need(method='role', value=u'plugin_pluginmanager_manage')")
2020-11-14 18:11:26,945 - octoprint.server - INFO - Added new permission from plugin softwareupdate: PLUGIN_SOFTWAREUPDATE_CHECK (needs: u"Need(method='role', value=u'plugin_softwareupdate_check')")
2020-11-14 18:11:26,946 - octoprint.server - INFO - Added new permission from plugin softwareupdate: PLUGIN_SOFTWAREUPDATE_UPDATE (needs: u"Need(method='role', value=u'plugin_softwareupdate_update')")
2020-11-14 18:11:26,975 - octoprint.printer.standard - INFO - Using print time estimator provided by PrintTimeGenius
2020-11-14 18:11:26,994 - octoprint.plugins.cancelobject - INFO - No beforegcode defined
2020-11-14 18:11:26,995 - octoprint.plugins.cancelobject - INFO - No aftergcode defined
2020-11-14 18:11:27,260 - octoprint.plugins.softwareupdate - INFO - Loaded version cache from disk
2020-11-14 18:11:28,595 - octoprint.util.pip - INFO - Using "/home/pi/oprint/bin/python2 -m pip" as command to invoke pip
2020-11-14 18:11:29,707 - octoprint.util.pip - INFO - Version of pip is 19.3.1
2020-11-14 18:11:29,709 - octoprint.util.pip - INFO - pip installs to /home/pi/oprint/lib/python2.7/site-packages (writable -> yes), --user flag needed -> no, virtual env -> yes
2020-11-14 18:11:29,710 - octoprint.util.pip - INFO - ==> pip ok -> yes
2020-11-14 18:11:29,714 - octoprint.plugin.core - INFO - Initialized 28 plugin implementation(s)
2020-11-14 18:11:29,744 - octoprint.plugins.psucontrol - INFO - Using GPIO for On/Off
2020-11-14 18:11:29,745 - octoprint.plugins.psucontrol - INFO - Using internal tracking for PSU on/off state.
2020-11-14 18:11:29,746 - octoprint.plugins.psucontrol - INFO - Running RPi.GPIO version 0.7.0
2020-11-14 18:11:29,747 - octoprint.plugins.psucontrol - INFO - Using GPIO for On/Off
2020-11-14 18:11:29,748 - octoprint.plugins.psucontrol - INFO - Configuring GPIO for pin 14
2020-11-14 18:11:29,754 - octoprint.plugin.core - INFO - 28 plugin(s) registered with the system:
| Action Command Notification Support (bundled) = /home/pi/oprint/lib/python2.7/site-packages/octoprint/plugins/action_command_notification
| Action Command Prompt Support (bundled) = /home/pi/oprint/lib/python2.7/site-packages/octoprint/plugins/action_command_prompt
| Announcement Plugin (bundled) = /home/pi/oprint/lib/python2.7/site-packages/octoprint/plugins/announcements
| Anonymous Usage Tracking (bundled) = /home/pi/oprint/lib/python2.7/site-packages/octoprint/plugins/tracking
| Application Keys Plugin (bundled) = /home/pi/oprint/lib/python2.7/site-packages/octoprint/plugins/appkeys
| Autoscroll (0.0.3) = /home/pi/oprint/local/lib/python2.7/site-packages/octoprint_autoscroll
| Backup & Restore (bundled) = /home/pi/oprint/lib/python2.7/site-packages/octoprint/plugins/backup
| BetterHeaterTimeout (1.3.0) = /home/pi/oprint/local/lib/python2.7/site-packages/octoprint_BetterHeaterTimeout
| Cancel Objects (0.4.4) = /home/pi/oprint/local/lib/python2.7/site-packages/octoprint_cancelobject
| Core Wizard (bundled) = /home/pi/oprint/lib/python2.7/site-packages/octoprint/plugins/corewizard
| Detailed Progress (0.2.6) = /home/pi/oprint/local/lib/python2.7/site-packages/octoprint_detailedprogress
| Discovery (bundled) = /home/pi/oprint/lib/python2.7/site-packages/octoprint/plugins/discovery
| Error Tracking (bundled) = /home/pi/oprint/lib/python2.7/site-packages/octoprint/plugins/errortracking
| File Check (2020.8.7) (bundled) = /home/pi/oprint/local/lib/python2.7/site-packages/octoprint_file_check
| Firmware Check (2020.9.23) (bundled) = /home/pi/oprint/local/lib/python2.7/site-packages/octoprint_firmware_check
| Floating Navbar (0.3.4) = /home/pi/oprint/local/lib/python2.7/site-packages/octoprint_floatingnavbar
| GCode Viewer (bundled) = /home/pi/oprint/lib/python2.7/site-packages/octoprint/plugins/gcodeviewer
| Logging (bundled) = /home/pi/oprint/lib/python2.7/site-packages/octoprint/plugins/logging
| Login UI (bundled) = /home/pi/oprint/lib/python2.7/site-packages/octoprint/plugins/loginui
| Navbar Temperature Plugin (0.14) = /home/pi/oprint/local/lib/python2.7/site-packages/octoprint_navbartemp
| Pi Support Plugin (bundled) = /home/pi/oprint/lib/python2.7/site-packages/octoprint/plugins/pi_support
| Plugin Manager (bundled) = /home/pi/oprint/lib/python2.7/site-packages/octoprint/plugins/pluginmanager
| PortLister (0.1.10) = /home/pi/oprint/local/lib/python2.7/site-packages/octoprint_portlister
| PrintTimeGenius Plugin (2.2.6) = /home/pi/oprint/local/lib/python2.7/site-packages/octoprint_PrintTimeGenius
| PSU Control (0.1.9) = /home/pi/oprint/local/lib/python2.7/site-packages/octoprint_psucontrol
| Simple Emergency Stop (1.0.3) = /home/pi/oprint/local/lib/python2.7/site-packages/octoprint_simpleemergencystop
| Software Update (bundled) = /home/pi/oprint/lib/python2.7/site-packages/octoprint/plugins/softwareupdate
| Virtual Printer (bundled) = /home/pi/oprint/lib/python2.7/site-packages/octoprint/plugins/virtual_printer
Prefix legend: ! = disabled, # = blacklisted, * = incompatible
2020-11-14 18:11:29,777 - octoprint.environment - INFO - Detected environment is Python 2.7.16 under Linux (linux2). Details:
| hardware:
| cores: 4
| freq: 1200.0
| ram: 917016576
| os:
| id: linux
| platform: linux2
| plugins:
| pi_support:
| model: Raspberry Pi 3 Model B Rev 1.2
| octopi_version: 0.17.0
| python:
| pip: 19.3.1
| version: 2.7.16
| virtualenv: /home/pi/oprint
2020-11-14 18:11:29,793 - octoprint.server - INFO - Reset webasset folder /home/pi/.octoprint/generated/webassets...
2020-11-14 18:11:29,819 - octoprint.server - INFO - Reset webasset folder /home/pi/.octoprint/generated/.webassets-cache...
2020-11-14 18:11:31,277 - octoprint.server - INFO - Shutting down intermediary server...
2020-11-14 18:11:31,709 - octoprint.server - INFO - Intermediary server shut down
2020-11-14 18:11:31,712 - octoprint.events - INFO - Processing startup event, this is our first event
2020-11-14 18:11:31,714 - octoprint.events - INFO - Adding 0 events to queue that were held back before startup event
2020-11-14 18:11:31,718 - octoprint.server - INFO - Autoconnect on startup is configured, trying to connect to the printer...
2020-11-14 18:11:31,719 - octoprint.filemanager - INFO - Adding backlog items from all storage types to analysis queue...
2020-11-14 18:11:31,768 - octoprint.filemanager - INFO - Added 0 items from storage type "local" to analysis queue
2020-11-14 18:11:31,795 - octoprint.server - INFO - Trying to connect to configured serial port None
2020-11-14 18:11:31,866 - octoprint.util.comm - INFO - Changing monitoring state from "Offline" to "Detecting serial connection"
2020-11-14 18:11:31,867 - octoprint.server.util.watchdog - INFO - Running initial scan on watched folder...
2020-11-14 18:11:31,888 - octoprint.server.util.watchdog - INFO - ... initial scan done.
2020-11-14 18:11:31,896 - octoprint.plugins.discovery - INFO - Registered 'OctoPrint instance on octopi' for _http._tcp
2020-11-14 18:11:31,916 - octoprint.plugins.discovery - INFO - Registered 'OctoPrint instance on octopi' for _octoprint._tcp
2020-11-14 18:11:31,917 - octoprint.util.comm - INFO - Serial detection: Performing autodetection with 0 port/baudrate candidates:
2020-11-14 18:11:31,923 - octoprint.util.comm - INFO - Changing monitoring state from "Detecting serial connection" to "Error: No more candidates to test, and no working port/baudrate combination detected."
2020-11-14 18:11:31,954 - octoprint.util.comm - INFO - Changing monitoring state from "Error: No more candidates to test, and no working port/baudrate combination detected." to "Offline (Error: No more candidates to test, and no working port/baudrate combination detected.)"
2020-11-14 18:11:31,960 - octoprint.plugins.discovery - INFO - Registered OctoPrint instance on octopi for SSDP
2020-11-14 18:11:31,984 - octoprint.plugins.action_command_notification - INFO - Notifications cleared
2020-11-14 18:11:32,006 - octoprint.server - INFO - Listening on http://127.0.0.1:5000
2020-11-14 18:11:32,180 - octoprint.plugins.pluginmanager - INFO - Loaded plugin repository data from disk, was still valid
2020-11-14 18:11:33,402 - octoprint.util.pip - INFO - Using "/home/pi/oprint/bin/python2 -m pip" as command to invoke pip
2020-11-14 18:11:33,446 - octoprint.util.pip - INFO - pip installs to /home/pi/oprint/lib/python2.7/site-packages (writable -> yes), --user flag needed -> no, virtual env -> yes
2020-11-14 18:11:33,497 - octoprint.util.pip - INFO - ==> pip ok -> yes
2020-11-14 18:11:33,547 - octoprint.plugins.softwareupdate - INFO - Minimum free storage across all update relevant locations is 11.9GB. That is considered sufficient for updating.
2020-11-14 18:11:33,749 - octoprint.util.connectivity.connectivity_checker - INFO - Connectivity changed from offline to online
2020-11-14 18:11:34,415 - octoprint.plugins.pluginmanager - INFO - Loaded plugin repository data from disk, was still valid
2020-11-14 18:11:35,029 - octoprint.plugins.pluginmanager - INFO - Loaded notice data from disk, was still valid
2020-11-14 18:11:35,813 - octoprint.plugins.detailedprogress - INFO - OctoPrint-DetailedProgress loaded!
2020-11-14 18:11:36,487 - octoprint.plugins.pluginmanager - INFO - Loaded notice data from disk, was still valid
2020-11-14 18:11:36,493 - octoprint.plugins.portlister - INFO - Port Lister () {}
2020-11-14 18:11:36,527 - octoprint.plugins.tracking - INFO - Sent tracking event ping, payload: {'octoprint_uptime': 10}
2020-11-14 18:11:36,708 - octoprint.server.preemptive_cache - INFO - Preemptively caching / (ui _default) for {'query_string': 'l10n=en', 'path': '/', 'base_url': 'http://octopi.local/'}
2020-11-14 18:11:36,962 - octoprint.plugins.tracking - INFO - Sent tracking event pong, payload: {'python': '2.7.16', 'ram': 917016576, u'octopi_version': u'0.17.0', 'version': u'1.4.2', u'plugins': u'betterheatertimeout:1.3.0,cancelobject:0.4.4,autoscroll:0.0.3,portlister:0.1.10,detailedprogress:0.2.6,simpleemergencystop:1.0.3,navbartemp:0.14,floatingnavbar:0.3.4,psucontrol:0.1.9,printtimegenius:2.2.6', 'pip': '19.3.1', 'cores': 4, 'freq': 1200.0, u'pi_model': u'Raspberry Pi 3 Model B Rev 1.2', 'os': 'linux'}
2020-11-14 18:11:37,285 - octoprint.plugins.tracking - INFO - Sent tracking event startup, payload: {'python': '2.7.16', 'ram': 917016576, u'octopi_version': u'0.17.0', 'version': u'1.4.2', 'pip': '19.3.1', 'cores': 4, 'freq': 1200.0, u'pi_model': u'Raspberry Pi 3 Model B Rev 1.2', 'os': 'linux'}
2020-11-14 18:11:48,760 - octoprint.server.preemptive_cache - INFO - ... done in 12.05s
2020-11-14 18:16:10,508 - octoprint.server.util.flask - INFO - Passively logging in user Harm from ::ffff:192.168.8.103
2020-11-14 18:16:10,515 - octoprint.access.users - INFO - Logged in user: Harm
2020-11-14 18:16:13,018 - octoprint.server.util.flask - INFO - Passively logging in user Harm from ::ffff:192.168.8.103
2020-11-14 18:16:13,023 - octoprint.access.users - INFO - Logged in user: Harm
2020-11-14 18:16:13,655 - octoprint.server.util.sockjs - INFO - New connection from client: ::ffff:192.168.8.103
2020-11-14 18:16:13,749 - octoprint.server.util.flask - INFO - Passively logging in user Harm from ::ffff:192.168.8.103
2020-11-14 18:16:13,751 - octoprint.access.users - INFO - Logged in user: Harm
2020-11-14 18:16:15,724 - octoprint.server.util.sockjs - INFO - User Harm logged in on the socket from client ::ffff:192.168.8.103
2020-11-14 18:16:20,462 - octoprint.plugins.psucontrol - INFO - Switching PSU On
2020-11-14 18:17:06,760 - octoprint.util.comm - INFO - Changing monitoring state from "Offline" to "Detecting serial connection"
2020-11-14 18:17:06,827 - octoprint.util.comm - INFO - Serial detection: Performing autodetection with 0 port/baudrate candidates:
2020-11-14 18:17:06,829 - octoprint.util.comm - INFO - Changing monitoring state from "Detecting serial connection" to "Error: No more candidates to test, and no working port/baudrate combination detected."
2020-11-14 18:17:06,843 - octoprint.util.comm - INFO - Changing monitoring state from "Error: No more candidates to test, and no working port/baudrate combination detected." to "Offline (Error: No more candidates to test, and no working port/baudrate combination detected.)"
2020-11-14 18:17:06,889 - octoprint.plugins.action_command_notification - INFO - Notifications cleared
2020-11-14 18:17:07,325 - octoprint.plugins.tracking - INFO - Sent tracking event commerror_autodetect, payload: {'commerror_text': u'No more candidates to test, and no working port/baudrate combination detected.'}
2020-11-14 18:17:32,499 - octoprint.util.comm - INFO - Changing monitoring state from "Offline" to "Detecting serial connection"
2020-11-14 18:17:32,529 - octoprint.util.comm - INFO - Serial detection: Performing autodetection with 0 port/baudrate candidates:
2020-11-14 18:17:32,533 - octoprint.util.comm - INFO - Changing monitoring state from "Detecting serial connection" to "Error: No more candidates to test, and no working port/baudrate combination detected."
2020-11-14 18:17:32,547 - octoprint.util.comm - INFO - Changing monitoring state from "Error: No more candidates to test, and no working port/baudrate combination detected." to "Offline (Error: No more candidates to test, and no working port/baudrate combination detected.)"
2020-11-14 18:17:32,599 - octoprint.plugins.action_command_notification - INFO - Notifications cleared
2020-11-14 18:17:33,125 - octoprint.plugins.tracking - INFO - Sent tracking event commerror_autodetect, payload: {'commerror_text': u'No more candidates to test, and no working port/baudrate combination detected.'}
2020-11-14 18:18:21,143 - octoprint.util.comm - INFO - Changing monitoring state from "Offline" to "Detecting serial connection"
2020-11-14 18:18:21,174 - octoprint.util.comm - INFO - Serial detection: Performing autodetection with 0 port/baudrate candidates:
2020-11-14 18:18:21,177 - octoprint.util.comm - INFO - Changing monitoring state from "Detecting serial connection" to "Error: No more candidates to test, and no working port/baudrate combination detected."
2020-11-14 18:18:21,184 - octoprint.util.comm - INFO - Changing monitoring state from "Error: No more candidates to test, and no working port/baudrate combination detected." to "Offline (Error: No more candidates to test, and no working port/baudrate combination detected.)"
2020-11-14 18:18:21,369 - octoprint.plugins.action_command_notification - INFO - Notifications cleared
2020-11-14 18:18:21,755 - octoprint.plugins.tracking - INFO - Sent tracking event commerror_autodetect, payload: {'commerror_text': u'No more candidates to test, and no working port/baudrate combination detected.'}
2020-11-14 18:18:21,991 - octoprint.util.comm - INFO - Changing monitoring state from "Offline" to "Detecting serial connection"
2020-11-14 18:18:22,030 - octoprint.util.comm - INFO - Serial detection: Performing autodetection with 0 port/baudrate candidates:
2020-11-14 18:18:22,032 - octoprint.util.comm - INFO - Changing monitoring state from "Detecting serial connection" to "Error: No more candidates to test, and no working port/baudrate combination detected."
2020-11-14 18:18:22,053 - octoprint.util.comm - INFO - Changing monitoring state from "Error: No more candidates to test, and no working port/baudrate combination detected." to "Offline (Error: No more candidates to test, and no working port/baudrate combination detected.)"
2020-11-14 18:18:22,101 - octoprint.plugins.action_command_notification - INFO - Notifications cleared
2020-11-14 18:18:22,542 - octoprint.plugins.tracking - INFO - Sent tracking event commerror_autodetect, payload: {'commerror_text': u'No more candidates to test, and no working port/baudrate combination detected.'}