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Resolved Opencv in python3 (container)

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  1. dinosilva95
    dinosilva95
  2. Container @ PLCnext (Docker, Moby, balena)
  3. Tuesday, 15 December 2020

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

Responses (3)
jan.mueller@phoenixcontact.de
jan.mueller@phoenixcontact.de Accepted Answer Pending Moderation
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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
  1. 2 weeks ago
  2. Container @ PLCnext (Docker, Moby, balena)
  3. # 1
Martin PLCnext Team
Martin PLCnext Team Accepted Answer Pending Moderation
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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.

Phoenix Contact Electronics Headquarters - PLCnext Runtime Product Management and Support

  1. 2 weeks ago
  2. Container @ PLCnext (Docker, Moby, balena)
  3. # 2
jan.mueller@phoenixcontact.de
jan.mueller@phoenixcontact.de Accepted Answer Pending Moderation
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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

  1. 2 weeks ago
  2. Container @ PLCnext (Docker, Moby, balena)
  3. # 3
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