Packages required to run gRPC on AXC

[AndyE-PxC]

What packages are required to be installed on the AXC platform to use gRPC with Python?

I believe I have generated the stubs correctly as per the instructions in the folder in the repository. And I've generated a simple python script to write to a string port in the PLC.

On the PLC I have run the following commands:

pip install grpcio
pip install protobuf

Then I attempt to run my test script, but then receive the following error:

ImportError: cannot import name 'cygrpc' from 'grpc._cython' (/opt/plcnext/.local/lib/python3.8/site-packages/grpc/_cython/init.py)

Am I missing a package? Trying to install cygrpc via pip, just generates a lot of errors?

[SidMarc]

Here I have the same problem.
Did you find any solution ?

[AndyE-PxC]

I can get the gRPC to work on the AXC F 3152 platform after install the following App from the plcnextstore:

Python Basics

I have run through the basic functions to Read / Write data to the PLCnext runtime, but I haven't gone through all the features yet.

I haven't yet got it working on an AXC F 2152. The current thinking is that some of the required Python packages are not compiled for ARM (2152 = ARM, 3152 = x86). So some cross compilation may be required (it may be easier to do this in a docker container on an x86 machine), but I haven't got that far yet. Once I get a working system on X86, I'll look at cross compilation and maybe a container - however that is something I'm going to have to take time to learn as I've not had to do that yet ;-)

[martinboers]

There's an example here for the AXC F 3152
https://www.plcnext-community.net/makersblog/grpc-python-read-and-write-process-data/