Ros2subscriber/receive Subscriber did not receive any messages and timed out.

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Isaiah Garcia-Romaine
评论： haoyang 2024-8-16
Hello,
I am attempting to subcribe nodes on matlab to PX4 Autopilot topics. I am running PX4 software in the loop flying a simulated quadcopter, I can echo the ROS2 topics in linux terminal, so there is data being published. However when I attempt to subscribe using MATLAB I do not recieve any data. I am not sure what the issue is as I have almost completely followed examples where /chatter is the topic.
rosinit;
setenv("ROS_DOMAIN_ID","101");%I need this to not conflict with other ROS2
%networks/shouldn't be a problem because matlab can see the topics with ros2 topic list
node1 = ros2node('matlab');
node2 = ros2subscriber(node1,'/fmu/out/sensor_combined');
msg = receive(node2,10)
>> ros2sub
Error using ros2subscriber/receive
Subscriber did not receive any messages and timed out.
Error in ros2sub (line 7)
msg = receive(node2,10)
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Isaiah Garcia-Romaine
Isaiah Garcia-Romaine 2023-6-9
Hi Sravan Pentlavelly,
Thank you for your response. It turns out that the issue is that default ROS subscribers are incompatible with PX4 publishers due to their different QoS settings. To fix the problem I used this MATLAB documentation: https://www.mathworks.com/help/ros/ug/manage-quality-of-service-policies-in-ros2.html

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采纳的回答

Jagadeesh Konakalla
It turns out that the issue is that default ROS subscribers are incompatible with PX4 publishers due to their different QoS settings. To fix the problem I used this MATLAB documentation: https://www.mathworks.com/help/ros/ug/manage-quality-of-service-policies-in-ros2.html

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