#14 Modbus (over TCP/IP) issue

Modbus over TCP/IP doesn't seem to work, in the log files I see this issue. Do you know how to resolve this?

Unable to install package pymodbus==1.5.2: ERROR: Will not install to the user site because it will lack sys.path precedence to pymodbus in /snap/home-assistant-snap/529/lib/python3.10/site-packages

Hi John,

This issue is hard to come around, as a package in the requirements.txt file of HA require a version that is different and was bundled with - and stored on the RO partition. So pip won't allow to install/update the package.

You can check the site-packages under the snap directory and search for it, just to confirm another version is there. E.g

sudo snap shell --run home-assistant-snap
find $SNAP -name pymodbus*

Then exit the shell when done.

I'm considering to not include the "requirement_all.txt" file, and let HA install whatever is necessary on demand and only lock down and ship with the bare minimum requirements for HA core - not the integrations.

Thanks Joachim,

I'm not sure if this is helpful, but here's the output:

digitalpals@ubuntu:~$ sudo snap run --shell home-assistant-snap
root@ubuntu:/snap/home-assistant-snap/529# find $SNAP -name pymodbus*
/snap/home-assistant-snap/529/bin/pymodbus.console
/snap/home-assistant-snap/529/bin/pymodbus.server
find: File system loop detected; ‘/snap/home-assistant-snap/529/lib/python3.10/site-packages/caldav/lib’ is part of the same file system loop as ‘/snap/home-assistant-snap/529/lib’.
find: File system loop detected; ‘/snap/home-assistant-snap/529/lib/python3.10/site-packages/construct/lib’ is part of the same file system loop as ‘/snap/home-assistant-snap/529/lib’.
find: File system loop detected; ‘/snap/home-assistant-snap/529/lib/python3.10/site-packages/fritzconnection/lib’ is part of the same file system loop as ‘/snap/home-assistant-snap/529/lib’.
find: File system loop detected; ‘/snap/home-assistant-snap/529/lib/python3.10/site-packages/numpy/core/lib’ is part of the same file system loop as ‘/snap/home-assistant-snap/529/lib’.
find: File system loop detected; ‘/snap/home-assistant-snap/529/lib/python3.10/site-packages/numpy/lib’ is part of the same file system loop as ‘/snap/home-assistant-snap/529/lib’.
find: File system loop detected; ‘/snap/home-assistant-snap/529/lib/python3.10/site-packages/numpy/random/lib’ is part of the same file system loop as ‘/snap/home-assistant-snap/529/lib’.
find: File system loop detected; ‘/snap/home-assistant-snap/529/lib/python3.10/site-packages/pandas/_libs/src/ujson/lib’ is part of the same file system loop as ‘/snap/home-assistant-snap/529/lib’.
/snap/home-assistant-snap/529/lib/python3.10/site-packages/pymodbus
/snap/home-assistant-snap/529/lib/python3.10/site-packages/pymodbus-2.5.3.dist-info
find: File system loop detected; ‘/snap/home-assistant-snap/529/lib/python3.10/site-packages/pyric/lib’ is part of the same file system loop as ‘/snap/home-assistant-snap/529/lib’.
root@ubuntu:/snap/home-assistant-snap/529# 

No generally. It just says that the package is already installed. You can check the version in the python interpreter.

Log back into the shell and go into the interpreter with source bin/activate bin/python3

And load the module and print the versio attribute

Is this what you were looking for?

root@ubuntu:/snap/home-assistant-snap/529# python -V
Python 3.10.7

(install) root@ubuntu:/snap/home-assistant-snap/529# pip show pymodbus
Name: pymodbus
Version: 2.5.3
Summary: A fully featured modbus protocol stack in python
Home-page: https://github.com/riptideio/pymodbus/
Author: Galen Collins
Author-email: bashwork@gmail.com
License: BSD-3-Clause
Location: /snap/home-assistant-snap/529/lib/python3.10/site-packages
Requires: pyserial, six
Required-by: pysmarty, pystiebeleltron

And can we maybe check what you were proposing to work towards a solution? Not sure if this is a lot to ask from you, but perhaps we can test it on a beta channel?

I'm considering to not include the "requirement_all.txt" file, and let HA install whatever is necessary on demand and only lock down and ship with the bare minimum requirements for HA core - not the integrations.

I decided to stop using this Snap and roll back to my Docker instances, since it's too important for me that this works. I will definitely try this snap again, but for now I'm rolling back.

Thanks for you efforts Joachim, much appreciated!

I had a similar problem with frigate custom component (v4.0.0 https://github.com/blakeblackshear/frigate-hass-integration) that wanted to install pytz 2022.7 but was unable to. Basically the same error message that OP had but with pytz.

Right now I switched to docker because I need frigate, but overall I like snap more because is easier to set up so I hope we can work something out as a solution here

Hi,

Yes, it's unfortunate. The reason for this is because of conflicting version numbers, between the package that is required by an official integration/component and the package that the custom component require.

Since the official integration is bundled with HA (and so is it's required packages). The bundled software lives in a Readonly filesystem, and that is the reason why requirements for other packages that is installed later on by the user is installed to the user-site.

This works great, until one of the requirements conflicts.

At the moment I'm not sure how to deal with it.

The current latest release (2023.4) of HA require pytz=2023.3. You can try to use that with the custom_component frigate by editing the requirements in custom_components/frigate/manifest.json and see if it works with the newer version.

Thanks, this indeed is a valid workaround