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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