Run ROS on multiple networks?
So the robot I'm working on has roscore running on a computer with two networks, one 900 mhz network and one 2.4 ghz network. The idea is to have high bandwidth messages (ex. videostreams from various cameras) go through the 2.4 ghz network and have crucial communciations (ex. joy msgs, other control msgs) to go through the 900mhz network.
What is the proper way to set this up? Is there even a way to constrain the nodes to only publish on a certain network(either 900mhz, 2.4ghz, or both) depending on which node it is?
Natively I don't think such fine grained control over the IPs/networks that nodes use/bind to is supported.
Would it be an option to use two VPNs with custom routes on the involved machines?
A multimaster setup may also help.
A multimaster setup might work for what i want. but does that mean ill have 4 roscore's running? 2.4ghz + 900mhz on laptop + 2.4 + 900 on robot jetson tx2. are there any downsides to this setup?
By setting
ROS_IPproperly you should be able to bind aroscoreto a certain IP. This might even remove the need for the VPNs. I'm not sure how nodes treat this btw (ie: if they also only bind onROS_IP). You'd have to test. Custom routing would still be needed.re: 4 roscores: no, that's not needed I think. I'd run a
roscoreon the robot in any case (so that even when it loses wireless it can still continue to function. This all hinges on whether nodes will bind to a certain IP I believe. Then you could do routing based on destination.