nodes with external master

[dxmann]

Hello!

Is it possible to register nodes and topics in myRIO while the master is running on an external linux platform connected in the same network?

Thanks!

[whitney_c]

Hi dxmann,

It is possible to do that. You will have to download the most recent VIs from our github, which contain the modified files that allow for that. You will need to create a source distribution (maintaining the ROS for LabVIEW folder hierarchy) and deploy it to your myRIO. Instructions on how to do that can be found in the Help folder. I will also upload the instructions to the documents folder on this site.

Whitney

[dxmann]

I've followed the tutorial but I have still problems. I've written a vi where a node subscribes a topic (/chatter). Roscore and the publisher (copied from the ros online tutorial) are on a linux board connected in the same (wifi) network. Looking inside the ROS_topic_read.vi I've found a problem in ROS_Topic_Read_Primative.vi when it tries to add to the queue a new message (the error is displayed in the picture). The same vi works correctly when runs on my pc. How can I upload the vi in order to show you the code?

[whitney_c]

Hi dxmann,

When you reply to this post, click "Use advanced editor" in the upper right-hand corner of the reply box. It will take you to a new page that will allow you to attach files. I'll take a look at it after you upload it to see if I can reproduce the error.

Whitney

[dxmann]

ok, this is the vi. I've not loaded the complete project because of the dimension.

[whitney_c]

Could you save your VI for 2015? Thanks!

[CTYeo]

Apologies for using this thread. I have the same issue with the above user. I am able to communicate with an external master using the ROS for LabView library on a Windows PC (my VI is a simple one with a Write node). However when I use the same VI from myRIO, it fails. When I check the error output, there was an error code of 1 from the Write node coming from Lossy Enqueue Element in AddToQueue.vi. Not sure what went wrong. Appreciate any help.