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I would like to establish a communication between my PLC (RevPi) which runs Codesys and a Jetson Nano (or Rasperry Pi) which will be running ROS2. The latter will be connected to a Router (for uploading data to a server), as can be seen on the image below.

My question is therefore: Is it possible to use OPC UA in ROS 2 to transfer the data to my PLC?

Thank you for your answers! Hardware Setup

Edit: I am aware of this package and this solution, but it doesn't seem to be compatible with ROS 2.

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  • $\begingroup$ I have the same question regarding a project I am working on. Have you found anything in the meantime concerning the communication via OPC UA with ROS2? $\endgroup$
    – ptrs_a
    Mar 14, 2022 at 10:33
  • $\begingroup$ I am working on it. Please send me a message and we can discuss in detail. $\endgroup$
    – Dr No
    Mar 15, 2022 at 11:18
  • $\begingroup$ You can run one script that can gather or send the data from/to the PLC and then connect to the ROS node on rapsberry pi ? Note that you can run this script on Raspbery PI itself. If you are using Python , it has a cool opc-ua module . $\endgroup$
    – McLovin
    Sep 9, 2022 at 17:21

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So to your direct question there is work to provide OPC-UA as a ROS 2 transport "inside" of ROS 2. See these slides form the 2016 ROS I conference

However, I think that the more practical approach will be not to try to run ROS 2 on your PLC, but to bridge it out with a standard OPC-UA client on the Jetson, and then republish it on the ROS 2 communications channel. This will keep things separate and not require you to try to merge two different communication protocols.

Alternatively you could also consider running a ROS 2 node on your PLC and then publishing it via ROS 2 messages to the Jetson as well. Which will require compiling onto the PLC but then just be one more network connection in ROS 2.

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  • $\begingroup$ > Alternatively you could also consider running a ROS 2 node on your PLC. How on Earth can you do that? $\endgroup$ Jan 16 at 16:32

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