ROS2: Publish an array with rqt

[George-Gi]

Hi everyone, I have been using rqt to publish messages to test my applications, however I still haven't found a way to publish a message that includes an array.
In my custom message I have a variable size array declared as uint8[]. I notice in rqt that the expected type is "sequence".
I have tried different expressions, but couldn't figure out the correct one. Could someone provide an example please?

[RyanDelGizzi]

Hi @giwrgosG,

I created the original question on ROS Answers and set out to resolve the issue. Same issue here for rqt_publisher.

One problem is how get_slot_types handles array message types. Since Crystal, the string for array type has changed, using a <> syntax instead of a [] syntax. And such, the parsing of that info needs to change.

I have a fix for this repo, and also one for rqt_publisher which allows us to publish arrays. However, @mlautman has a (massive) PR #224 that addresses this issue along with a myriad of other crystal->foxy differences. I don't think it makes sense for me to submit a PR on this repo to address a small change that is already addressed in another PR. There are still changes that need to be made to rqt_publisher to support the changes in this repo, but they are rather small.

@mlautman I would love to help move this along as well getting rqt_publisher working as well. If there is a way I can assist, please let me know!

[ijnek]

Hi @RyanDelGizzi
👍 to your suggested fix, this would be quite desirable. Considering #224 hasn't had any updates in a while, it would be great if you could consider putting a PR up with your changes!
Thanks!