Did you even try to look for the answer to this very frequently asked question ?
Please use the 'search conversations within weewx-user' box at the top of the browser and look for your exact error message "*serial.serialutil.SerialException: [Errno 13] could not open port /dev/ttyUSB0: [Errno 13] Permission denied: '/dev/ttyUSB0'*" Any of the top five returned results provide the answer. My answer from March to somebody else in https://groups.google.com/g/weewx-user/c/duGfSg6cQZ4/m/adiOz1FUAAAJ <https://groups.google.com/g/weewx-user/c/duGfSg6cQZ4/m/adiOz1FUAAAJ> provides links to the why. ALWAYS ALWAYS ALWAYS SEARCH FOR YOUR EXACT ERROR MESSAGE. The odds are very very high that it has been asked and answered here before. On Wednesday, June 5, 2024 at 8:21:16 AM UTC-7 barry manilow wrote: > Just installed Weewx 5 and new install of Bookworm 32 bit on Raspberry pi > 4. I'm using a USB Serial interface with my Davis Vantage Vue, which has > worked perfectly for the past few years. > After completing setup I started with sudo service weewx start. > No data appeared to be sent, so checked weewx status and got this error: > > $ sudo service weewx status > × weewx.service - WeeWX > Loaded: loaded (/lib/systemd/system/weewx.service; enabled; preset: > enabled) > Active: failed (Result: exit-code) since Wed 2024-06-05 16:07:17 BST; > 53s ago > Duration: 299ms > Docs: https://weewx.com/docs > Process: 1733 ExecStart=weewxd /etc/weewx/weewx.conf (code=exited, > status=4) > Main PID: 1733 (code=exited, status=4) > CPU: 299ms > > Jun 05 16:07:17 raspberrypi weewxd[1733]: CRITICAL weewx.engine: **** > > ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ > Jun 05 16:07:17 raspberrypi weewxd[1733]: CRITICAL weewx.engine: **** > File "/usr/lib/python3/dist-packages/serial/serialutil.py", line 244, in > __init__ > Jun 05 16:07:17 raspberrypi weewxd[1733]: CRITICAL weewx.engine: **** > self.open() > Jun 05 16:07:17 raspberrypi weewxd[1733]: CRITICAL weewx.engine: **** > File "/usr/lib/python3/dist-packages/serial/serialposix.py", line 325, > in open > Jun 05 16:07:17 raspberrypi weewxd[1733]: CRITICAL weewx.engine: **** > raise SerialException(msg.errno, "could not open port {}: > {}".format(self._port, msg)) > Jun 05 16:07:17 raspberrypi weewxd[1733]: CRITICAL weewx.engine: **** > serial.serialutil.SerialException: [Errno 13] could not open port > /dev/ttyUSB0: [Errno 13] Permission denied: '/dev/ttyUSB0' > Jun 05 16:07:17 raspberrypi weewxd[1733]: CRITICAL __main__: Unable to > load driver: [Errno 13] could not open port /dev/ttyUSB0: [Errno 13] > Permission denied: '/dev/ttyUSB0' > Jun 05 16:07:17 raspberrypi weewxd[1733]: CRITICAL __main__: **** > Exiting... > Jun 05 16:07:17 raspberrypi systemd[1]: weewx.service: Main process > exited, code=exited, status=4/NOPERMISSION > Jun 05 16:07:17 raspberrypi systemd[1]: weewx.service: Failed with result > 'exit-code' > > Something has changed with permissions I think, but no idea what. > Any ideas on what has happened? Thanks! > > -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to weewx-user+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/weewx-user/86fdeead-4826-4b63-9716-ef82c541b7d1n%40googlegroups.com.
