What is the problem?
Octoprint stopped detecting my printers. When I try to connect all I get is " Offline (Error: No more candidates to test, and no working port/baudrate combination detected.)
What did you already try to solve it?
I tried restarting octoprint and the printers, changing the cables and ports.
I was running two printers simultaneously (localhost 5000 and 5001) after the prints finished I could no longer connect either printer.
Printers have no trouble connecting to MatterControl and Cura.
Complete Logs
octoprint.log, serial.log or output on terminal tab at a minimum, browser error console if UI issue ... no logs, no support! Not log excerpts, complete logs.)
SerialException: could not open port 'COM3': WindowsError(5, 'Access is denied.')
2020-08-29 23:26:51,289 - octoprint.util.comm - INFO - Serial detection: Could not open port COM3, baudrate 115200, skipping
2020-08-29 23:26:51,290 - octoprint.util.comm - INFO - Serial detection: Trying port COM3, baudrate 250000
2020-08-29 23:26:51,296 - octoprint.util.comm - INFO - Connecting to port COM3, baudrate 250000
2020-08-29 23:26:51,299 - octoprint.util.comm - ERROR - Unexpected error while connecting to serial port COM3, baudrate 250000 from hook default: SerialException: 'could not open port 'COM3': WindowsError(5, 'Access is denied.')' @ comm.py:_open_serial:2784
Traceback (most recent call last):
File "c:\octoprint\venv\lib\site-packages\octoprint\util\comm.py", line 2784, in _open_serial
settings().getFloat(["serial", "timeout", "connection"]))
File "c:\octoprint\venv\lib\site-packages\octoprint\util\comm.py", line 2765, in default
serial_obj.open()
File "c:\octoprint\venv\lib\site-packages\serial\serialwin32.py", line 62, in open
raise SerialException("could not open port {!r}: {!r}".format(self.portstr, ctypes.WinError()))
SerialException: could not open port 'COM3': WindowsError(5, 'Access is denied.')
Additional information about your setup
OctoPrint version, OctoPi version, printer, firmware, browser, operating system, ... as much data as possible
Im running octoprint 1.4.2, on windows 10