Can a node act as a server and a publisher?

asked 2011-08-15 12:28:15 -0600

Gideon
239 ●7 ●13 ●17

Hello all, I have a piece of hardware (LabJack UE9) I am using to interface with a diesel generator for data acquisition as well as for some simple controls (turning it on and off), and I would like to have the node that interfaces with it to be capable of both publishing acquired data and servicing client requests to turn the generator on and off. Is this possible? I have successfully implemented client/servers as well as publishers/subscribers, but I am having problems stitching them together.

Thanks

Gideon

edit retag flag offensive close merge delete

add a comment

1

answered 2011-08-15 13:24:40 -0600

Gideon
239 ●7 ●13 ●17

Yes it can, although I am still uncertain what happens to the published messages when the service takes a while to fulfill the request. For anyone else trying to do this, I found the stitching together of examples from the tutorials much easier once I found class based examples (http://www.ros.org/wiki/roscpp_tutorials/Tutorials/UsingClassMethodsAsCallbacks)

edit flag offensive delete link

Comments

Once the message has been "published" the service call will not effect it.

tfoote ( 2011-08-15 16:29:54 -0600 )edit

add a comment

2

answered 2011-08-16 04:25:03 -0600

Thomas D

4347 ●33 ●65 ●86 http://denewiler.us/cv

updated 2011-08-30 05:01:42 -0600

I have written a set of tutorials that should help clear up how to have a publisher/subscriber along with a dynamic reconfigure server running within a single node. The nodes also use classes for the majority of the work/callback functions which I have found to be the cleanest way to do things with pub/sub in general. It should not be too difficult to stitch in a server/client to the example provided in the tutorial.

edit flag offensive delete link

add a comment

0

answered 2012-06-01 19:40:41 -0600

malong
1 ●2 ●3 ●5

updated 2012-06-03 17:28:42 -0600

hi ,i have ever thought this problem,and find a way to realise using message in the request and response. you can see it : http://answers.ros.org/question/35502/i-want-to-send-multiple-requst-and-multiple/

edit flag offensive delete link

add a comment

Can a node act as a server and a publisher?

3 Answers

Comments

Question Tools

Stats

Related questions

Can a node act as a server and a publisher? edit

3 Answers

Comments

Question Tools

Stats

Related questions

Can a node act as a server and a publisher?