ERROR with bms-exporter about bms-monitoring-stack HOT 8 CLOSED

Okay, I tried it from the Raspberry OS and the same error appeared.

Traceback (most recent call last):
File "/home/arnispeicher/Docker/bms-monitoring-stack-master/bms-db/bms-db", line 158, in
main()
File "/home/arnispeicher/Docker/bms-monitoring-stack-master/bms-db/bms-db", line 149, in main
device = AnyDevice(mac_address=sys.argv[1], manager=manager, c=c, conn=conn)
File "/home/arnispeicher/Docker/bms-monitoring-stack-master/bms-db/bms-db", line 23, in init
super().init(**kwargs)
File "/usr/local/lib/python3.9/dist-packages/gatt/gatt_linux.py", line 256, in init
device_object = self._bus.get_object('org.bluez', self._device_path)
File "/usr/lib/python3/dist-packages/dbus/bus.py", line 241, in get_object
return self.ProxyObjectClass(self, bus_name, object_path,
File "/usr/lib/python3/dist-packages/dbus/proxies.py", line 246, in init
_dbus_bindings.validate_object_path(object_path)
ValueError: Invalid object path '/org/bluez/hci0/dev_BMSINFO.PY': contains invalid character '.'

So I guess your suggestion that code changes are needed due to new versions of those packages is correct. Read something similar concerning a invalid character '-' error in a forum somewhere.

Thanks for your help!

Maybe my googling skills will get me somewhere. If I should manage to solve the problem, I will post the solution. Just in case someone stumbles upon this.

Cheers!

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I didn't encounter this behavior, but my guess is:
https://github.com/stefanandres/bms-monitoring-stack/blob/master/bms-exporter/bms_exporter/main.py#L34
This reads the returned values from the sqlite file.
I could imagine this will fail when don't have any entries in the db yet.

Can you check if you have any records in the sqlite database yet? (those are written by the bms-db container)

from bms-monitoring-stack.

Hi,
I am a noob trying to run your code :-D

I have encountered the same error on the exporter side.

Tried to look into the problem on the bms-db side as you suggested @stefanandres. The database, so the file bms.db seems to have no content except for the header. I ran the following command to start bms-db in terminal:

$ sudo docker run -it -v /home/arnispeicher/Docker/bms-monitoring-stack-master/bms-db:/app -v /run/dbus/system_bus_socket:/run/dbus/system_bus_socket --privileged bms-db

From here, I tried to run python3 bms-db bmsinfo.py A4:C1:38:91:C6:XY within the app directory. This outputs the following Error:

Traceback (most recent call last):
File "bms-db", line 158, in
main()
File "bms-db", line 149, in main
device = AnyDevice(mac_address=sys.argv[1], manager=manager, c=c, conn=conn)
File "bms-db", line 23, in init
super().init(**kwargs)
File "/usr/local/lib/python3.6/dist-packages/gatt/gatt_linux.py", line 256, in init
device_object = self._bus.get_object('org.bluez', self._device_path)
File "/usr/lib/python3/dist-packages/dbus/bus.py", line 241, in get_object
follow_name_owner_changes=follow_name_owner_changes)
File "/usr/lib/python3/dist-packages/dbus/proxies.py", line 244, in init
_dbus_bindings.validate_object_path(object_path)
ValueError: Invalid object path '/org/bluez/hci0/dev_BMSINFO.PY': contains invalid character '.'

So there seems to be an invalid path due to the character '.'

btw, I looked into bluetooth functionality, because I read that this might be related to the dbus access set in the docker run. I ran bluetoothctl and scan on then connect A4:C1:38:91:C6:XY from within the container. Which shows and connects to my Liontron. And when I check from the host via ps aux | grep blue I see a root user accessing bluetoothd. So i guess bluetooth access from the container side is fine.

Sorry, if my approach makes no sense :-D Maybe you could help me out, point me in the right direction?

Cheers!

from bms-monitoring-stack.

Well, honestly I have no idea.
I think I sometimes used hcitool to manually check some stuff.
Are you sure your bt device is also named hci0? I've just hard coded that in https://github.com/stefanandres/bms-monitoring-stack/blob/master/bms-db/bms-db#L19

I basically only use it with Raspberry Pi OS.

from bms-monitoring-stack.

I am also running this on Raspberry Pi OS (Lite).

I just checked with hcitool dev the output states:

Devices:
hci0 DC:A6:32:18:A2:XY

To my understanding, this indicates that the hci0 is indeed correct?

from bms-monitoring-stack.

Yep, you could also try running it without docker
For this you have to install all the dependencies manually directly on the OS and run the ./bms-db python script.

See https://github.com/stefanandres/bms-monitoring-stack/blob/master/bms-db/Dockerfile for all the required packages. It's also possible that newer versions of any of those requirements needs changing of the code, but my Pi is shutoff and I probably won't put any more effort into this project.

from bms-monitoring-stack.

hello stefan,

today i've found some time to check your suspect. You were right, this is the solution! There were no entries in the sqlite db. The problem was, that there was no automatic connection established between my pi and the bms. I connected manually via shell in docker container. Now it's working fine, thanks for your help!

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Cool, how did you connect it? Usually this is not needed since the bms-db does the connection itself 🤔

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