Add devantech dS378 ethernet relay agent

[dixilo]

Description

This pull request adds a new agent to operate devantech's dS378 ethernet relay.

Motivation and Context

Since dS378 is used in the electronics of the stimulator, the agent should be included in this repository.

How Has This Been Tested?

Test was done using the actual dS378 device.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.

[BrianJKoopman]

Thanks for the PR! And sorry its taken so long to get to reviewing. This looks really good overall, just a couple of minor comments, mostly related to documentation. I also made a comment about robustness to network outages, but again that can be done later if needed.

Please make a merge commit to merge in the latest from main while you're working on these.

[dixilo]

Thanks for your detailed review!
I modified the codes according to your review comments.

[BrianJKoopman]

This looks great, thanks for addressing all the comments, and for your detailed responses! A few more small suggestions.

It's great to see use of the TCPInterface class too, glad that was straightforward. Just to confirm, the agent now can gracefully recover itself from a network interruption, say if you disconnected the network cable to the dS378?

I'm going to push a couple of small changes as well that I figured would just be quicker to do while I was re-reviewing. Please be sure to pull those before continuing with the suggested changes. Thanks again!

[dixilo]

Thanks for the review and the comments!
I modified the codes according to your suggestions.

[BrianJKoopman]

Thanks for implementing the suggestions, looks great!