Hello All,
After trying to pick-up the pieces of a borked upgrade, I just
encountered the same 'could not open port /dev/ttyUSB0'. Entirely possible
that I've missed documentation somewhere, but is would seem that weewx, is
now running as usr:grp weewx:weewx (which is where the upgrade script
borked, setting user permissions)? My fix was amending permissions on:
'/dev/ttyUSB0' to: root:weewx, and weewx started fine. Until, it tried to
write the HTML, where weewx no-longer had permissions. Upon granting weewx
permission to that folder / sub-folders, all seems well. Thoughts, anyone?
Best regards, Jason.
On Sunday 11 February 2024 at 07:36:30 UTC+11 Joseph Verreau wrote:
> p.p.s I just noticed that I didn't have the subsystem prefix on my rule.
> So my entry in 50-localusb.rules is:
> SUBSYSTEM=="tty",ATTRS{serial}=="1344794749",
> ATTRS{manufacturer}=="Silicon Labs", SYMLINK+="DavisVP"
> and I rebooted; altho I still don't have a symlink for /dev/DavisVP
> all the same my station is back online, submitting reports to all three
> configured weather services
>
> On Saturday, February 10, 2024 at 3:22:52 PM UTC-5 Joseph Verreau wrote:
>
>> p.s. just noticed I'm not getting a symlink for the DavisVP rule but I
>> haven't rebooted since I added that local rule.
>>
>> Joe Verreau
>>
>> On Saturday, February 10, 2024 at 3:05:41 PM UTC-5 Joseph Verreau wrote:
>>
>>> hmm. this seems to be my issue on installing 5.0.0 following erasing
>>> 4.10. On my own I tried adding weewx user to the wheel group and to
>>> sudoers file. I tried what Matt and Paul were discussing about rule
>>> changes and yet I still get the "ERROR weewx.engine: Import of driver
>>> failed: [Errno 13] could not open port /dev/ttyUSB0: [Errno 13] Permission
>>> denied:" When I run as root from command line all seems to be good.
>>> Should I do a full report with journal log?
>>>
>>> Joe Verreau KMIOKEMO13
>>> Okemos, MI
>>>
>>> On Wednesday, January 31, 2024 at 11:09:41 AM UTC-5 matthew wall wrote:
>>>
>>>> On Wednesday, January 31, 2024 at 3:29:36 AM UTC-5 [email protected]
>>>> wrote:
>>>>
>>>> Hi Matthew
>>>>
>>>> Thanks for the information about the various udev folders which helps
>>>> me understand their interaction.
>>>>
>>>> I created a file /etc/udev/50-localusb.rules and inserted the rule.
>>>> Also, inherited from Linux Mint 20.1 running Weewx 4.8, I also have the
>>>> following line in /etc/udev/descriptive-names.rules
>>>>
>>>> ATTRS{serial}=="1344794749", ATTRS{manufacturer}=="Silicon Labs",
>>>> SYMLINK+="DavisVP"
>>>>
>>>> and that SYMLINK is created.
>>>>
>>>> /usr/lib/udev/rules.d/60-weewx.rules contains 10+ lines for different
>>>> stations and includes the following for Vantage:
>>>>
>>>> # davis vantage via usb-serial
>>>>
>>>> SUBSYSTEM=="tty",ATTRS{idVendor}=="10c4",ATTRS{idProduct}=="ea60",MODE="0664",GROUP="weewx",SYMLINK+="vantage"
>>>>
>>>> SUBSYSTEM=="tty",ATTRS{idVendor}=="10c4",ATTR{idProduct}=="ea61",MODE="0664",GROUP="weewx",SYMLINK+="vantage"
>>>>
>>>> The vantage SYMLINK is not being created.
>>>>
>>>> Not sure if I should leave 'as is' or edit 60-weewx.rules and remove
>>>> 50-localusb.rules
>>>>
>>>>
>>>> you can keep your 50-localusb.rules. you might want to consolidate the
>>>> vpro rule in localusb.rules with the vpro rule in descriptive-names.rules.
>>>>
>>>> or not. depends on how you like to manage things. and your weewx.conf
>>>> must already refer to 'DavisVP'...
>>>>
>>>> if you modify /usr/lib/udev/rules.d/60-weewx.rules, it will be
>>>> overwritten when you next upgrade weewx, so just leave it.
>>>>
>>>> on your system, is there a /dev/vantage that is a symlink to the
>>>> usb-serial adapter? if so, that indicates the weewx.rules in
>>>> /usr/lib/udev
>>>> is working.
>>>>
>>>> m
>>>>
>>>
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