Dependency Issues for Raspbian Buster Install

[suciokhan]

Following directions for expanded_xml branch doing an install to an RPI 4 B running Raspbian Buster, and I can't get it to serve the configuration gui to port 8080/init, but Dsiplay GUI on 8081 works fine.

I enabled logging and noticed an import error in the python.log, saying it can't import pyqtgraph.

Then I jumped into Python interpreter and when I tried to import it, it said I have to have pyqt5 + ...uh oh. After a bunch more poking, I think I see what you meant by saying Pyqt5 is for Ubuntu 20.04+ version. Assuming an earlier version of pyqtgraph would be compatible with pyqt4, I tried this:

pip3 install pyqtgraph==0.10.0 (released in 2016)

Now in Python, I can import pyqtgraph without an issue, so I thought this would solve my problems.

However, when I launch ./run.sh, I still see the same error in my logs:

Traceback (most recent call last):
  File "_GUI/hydra_main_window.py", line 25, in <module>
    import pyqtgraph as pg
ModuleNotFoundError: No module named 'pyqtgraph'

I then looked in requirements.txt and it says I need pyqt4==4.11.4, but it appears pyqt4 is not available via pip3, though apt install python3-pyqt4 gives me version 4.12.1.

Any ideas on how to get this working on RPI 4 B with Raspbian Buster? Does it have to be a full-on Ubuntu 18.04/20.04 or is there some other lighter-weight OS that I can put on the RPI that will work with this?