v5 runs as unprivileged user 'weewx' not as root, so sudo should never be
needed other after installation.
In order to test you need to run your command as user 'weewx' not as you...
# open a bash shell as user weewx:
sudo -u weewx bash
# verify this returns 'weewx' as the output
whoami
# then run the weewxd command and see how it looks:
PYTHONPATH=/etc/weewx/bin:/usr/share/weewx:/home/me/some/path/here weewxd
/etc/weewx/weewx.conf
And then exit the bash shell you opened above.
I don't really have a great solution for how to add python libraries using
'pip' to a system running a dpkg installation of weewx. I 'suppose' you
could add the libraries into the same place in PYTHONPATH that weewx
expects already but that's even messier. Try setting the PYTHONPATH and
see if you can get it working...
On Friday, July 10, 2026 at 10:42:06 AM UTC-7 Patrick Sifford wrote:
> Vince... I will give that a try!!
>
> I did just do a test.. I ran:
> sudo weewxd /etc/weewx/weewx.conf
>
> and I have the same error... where running
> weewxd I dont get the error
>
> What is the normal place for the adafruit_bmp280 to be located?
>
> Thanks
>
> On Friday, July 10, 2026 at 1:35:47 PM UTC-4 Vince Skahan wrote:
>
>> The basic problem is systemd doesn't know that you added more libraries
>> in an unexpected location.
>>
>> From some google and weewx-user searches there seem to be a couple things
>> to try....
>>
>> Edit the ExecStart section in /usr/lib/systemd/system/weewx.service to
>> prepend setting PYTHONPATH
>>
>> ExecStart=PYTHONPATH=/etc/weewx/bin:/usr/share/weewx:/home/me/some/path/here
>> weewxd /etc/weewx/weewx.conf
>>
>> Or add a line in the [Service] section there to set PYTHONPATH similarly
>> Environment=/etc/weewx/bin:/usr/share/weewx:/home/me/some/path/here
>>
>> Obviously use whatever path you installed things into. You'll likely
>> have to 'sudo systemctl daemon-reload' after editing that file before
>> testing.
>>
>> Disclaimer - I didn't test the above...
>>
>> On Friday, July 10, 2026 at 7:16:54 AM UTC-7 Patrick Sifford wrote:
>>
>>> Hello... I am new to this group and have been trying to get weewx up
>>> and running on a Raspberry pi 4 with Debian GNU/Linux
>>>
>>> I have had great success with my initial setup:
>>> Acurite Atlas sensor
>>> RTL-433/SDR
>>> weewx 5.4.0
>>> Hubitat Interface
>>>
>>> This has been running nicely for a few day and I have been able to
>>> add data to the Hubitat Interface.
>>>
>>> during this I have had no issues with either weewx or weewxd
>>>
>>> I have now decided to add a BMP280 to get pressure sensor data. I
>>> have successfully loaded the libraries (took several attempts)
>>>
>>> I have been able to run a test-bmp250.py file and obtain the
>>> appropriate data back from the system.
>>>
>>> I then started integrating with weewx. initially I had issues with
>>> both weewxd and weewx. I would get an error:
>>>
>>> : Traceback (most recent call last):
>>> Jul 10 09:11:29 raspberrypi weewxd[2198]: File
>>> "/usr/share/weewx/weewxd.py", line 226, in <module>
>>> Jul 10 09:11:29 raspberrypi weewxd[2198]: main()
>>> Jul 10 09:11:29 raspberrypi weewxd[2198]: ~~~~^^
>>> Jul 10 09:11:29 raspberrypi weewxd[2198]: File
>>> "/usr/share/weewx/weewxd.py", line 121, in main
>>> Jul 10 09:11:29 raspberrypi weewxd[2198]: engine =
>>> weewx.engine.StdEngine(config_dict)
>>> Jul 10 09:11:29 raspberrypi weewxd[2198]: File
>>> "/usr/share/weewx/weewx/engine.py", line 89, in __init__
>>> Jul 10 09:11:29 raspberrypi weewxd[2198]:
>>> self.loadServices(config_dict)
>>> Jul 10 09:11:29 raspberrypi weewxd[2198]:
>>> ~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^
>>> Jul 10 09:11:29 raspberrypi weewxd[2198]: File
>>> "/usr/share/weewx/weewx/engine.py", line 157, in loadServices
>>> Jul 10 09:11:29 raspberrypi weewxd[2198]: obj =
>>> weeutil.weeutil.get_object(svc)(self, config_dict)
>>> Jul 10 09:11:29 raspberrypi weewxd[2198]:
>>> ~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^
>>> Jul 10 09:11:29 raspberrypi weewxd[2198]: File
>>> "/usr/share/weewx/weeutil/weeutil.py", line 1405, in get_object
>>> Jul 10 09:11:29 raspberrypi weewxd[2198]: module =
>>> importlib.import_module(module_name)
>>> Jul 10 09:11:29 raspberrypi weewxd[2198]: File
>>> "/usr/lib/python3.13/importlib/__init__.py", line 88, in import_module
>>> Jul 10 09:11:29 raspberrypi weewxd[2198]: return
>>> _bootstrap._gcd_import(name[level:], package, level)
>>> Jul 10 09:11:29 raspberrypi weewxd[2198]:
>>> ~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>>> Jul 10 09:11:29 raspberrypi weewxd[2198]: File "<frozen
>>> importlib._bootstrap>", line 1387, in _gcd_import
>>> Jul 10 09:11:29 raspberrypi weewxd[2198]: File "<frozen
>>> importlib._bootstrap>", line 1360, in _find_and_load
>>> Jul 10 09:11:29 raspberrypi weewxd[2198]: File "<frozen
>>> importlib._bootstrap>", line 1331, in _find_and_load_unlocked
>>> Jul 10 09:11:29 raspberrypi weewxd[2198]: File "<frozen
>>> importlib._bootstrap>", line 935, in _load_unlocked
>>> Jul 10 09:11:29 raspberrypi weewxd[2198]: File "<frozen
>>> importlib._bootstrap_external>", line 1026, in exec_module
>>> Jul 10 09:11:29 raspberrypi weewxd[2198]: File "<frozen
>>> importlib._bootstrap>", line 488, in _call_with_frames_removed
>>> Jul 10 09:11:29 raspberrypi weewxd[2198]: File
>>> "/etc/weewx/bin/user/BMP280_service.py", line 6, in <module>
>>> Jul 10 09:11:29 raspberrypi weewxd[2198]: import adafruit_bmp280
>>> Jul 10 09:11:29 raspberrypi weewxd[2198]: ModuleNotFoundError: No module
>>> named 'adafruit_bmp280'
>>> Jul 10 09:11:29 raspberrypi systemd[1]: weewx.service: Main process
>>> exited, code=exited, status=1/FAILURE
>>> Jul 10 09:11:29 raspberrypi systemd[1]: weewx.service: Failed with
>>> result 'exit-code'.
>>>
>>> After playing with several group and ownership issues I was successful
>>> in running weewxd and ingesting pressure, altitude, and temperature data in
>>> to weewx and into hubitat!!!!!!!
>>>
>>> However, when trying to run weewx (using the sudo systemctl start weewx
>>> command) I still get the same response.
>>>
>>> I have put as much as I know in the weewx group. the BMP library
>>> ("Adafruit_BMP280_Library) got loaded into my home directory. with weewx as
>>> the group and owner.
>>>
>>> At a lost... to be soo close and yet soo far. Has anyone run into a
>>> situation where weewxd and weewx return different results?
>>>
>>> thanks
>>> Patrick Sifford
>>>
>>
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