Opencv in python3 (container)

Container @ PLCnext Technology
1

Good evening, I have a project, in which I need to run the opencv on the AXC F 2152. We are already running in a container (used in this tutorial https://www.plcnext-community.net/en/hn-makers-blog/556-containerized-opencv-python-on-plcnext.html) , it is opencv running on python2. There is some container for this plc that has opencv in python3? Or how to use, the same variables in PLCnextengineer and python2? PS: I need in python 3 because I need communicate with PyPLCn. PS2: I tried to install python-opcua to try to use python2 in communication, but I couldn’t (apparently there is an error in the installation due to lack of ram). Thanks, Dino Silva

2

Hi, You can install python3 in the image. Simply create a new image with the image and a docker file. It is a debian jessi, so python3 would be version 3.4.x

For building a image you need Docker, Belena is not possible. dockerfile:

FROM pxcbe/opencv-python  
>   
> RUN apt-get update   
> RUN apt-get install python3 -y --force-yes

For build:

docker build -t myname:version -f dockerfile
3

Out of interest, why is it not possible to build an image using Balena? In this tutorial: https://www.plcnext-community.net/en/hn-makers-blog/465-how-to-turn-an-axc-f-2152-into-an-aws-greengrass-device.html … the balena build command is used (in step 4) to create an image. What am I missing? ~ Martin.

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4

Hi, I still had in mind that the build tools are not available with Balena. Either I’m confusing things or something has changed. Right now I’m confused in my head :). Then of course Balena works too. G Jan