muscles's profile - activity

I am trying to launch my ROS master using below commands

roslaunch pkg_name launchfilename.launch

But I am getting below error

REQUIRED process [mavros-2] has died! process has finished cleanly

Please share your thoughts about this problem

Alright . Thank You very much. That was helpful

" Couldn't find executable named sensor_link1.py, below path to the package

Dear I tried it using rosrun. For my existing node sensor_link.py I ran rosrun sensor sensor_link.py and it started without an error. Then I made a new node for my testing named sensor_link1.py and tested it using rosrun. After running rosrun sensor sensor_link1.py I got an error on the console

How can I run it. I have a package called sensor, inside sensor I have a script folder inside script folder I have sensor_link.py, which reads sensor data and converts that data into a MAVLink message. I made another node sensor_link1.py inside script. Now can you please tell me how can I run this node so it is visible in rosnode list ?

I made a ROS node by simply doing some scripting in Python. Now, when I do rosnode list, it displays the list of all the active nodes. Now, I want to know how can I add the node to the list of already developed nodes ?

Can someone please explain in simple words, why do we need mavros ? I have been trying to understand mavros form the documentation but did not understand it completely.

Dear All,

I setup a system on my odroid and made few nodes to test it. I did the settings so that the nodes are launched by the Master on system boot up. Yesterday when I turned on my odroid , I could see all the five nodes after I typed in rosnode list on the terminal. Today when I booted my Odroid, and typed in rosnode list, I couldn't see the five nodes. Instead I am getting this error message .

Unable to communicate with master

That would be great if someone explain it to me what might be the problem. and what's the solution.

Sincerely,

Hi,

Hope everyone is fine here. I just need a little help about rosnode. I am using some pre built nodes and integrating them on to my system. On the terminal when I type in this command " rosnode info nodename", it gives me some information about the node that is the subscriptions, services, publications and connections. Below I am just typing in the Connections. That would be great if someone can help me in understanding what does each line means in the below lines.

Connections:
* topic: /mavlink/from
    * to: /mavlink_bridge
    * direction: outbound
    * transport: TCPROS
* topic: /rosout
    * to: /rosout
    * direction: outbound
    * transport: TCPROS
* topic: /gps/fix
    * to: /gps
    * direction: inbound
    * transport: TCPROS

Dear Javier,

Yes I have been through this specific page wiki.ros.org/rosout , but still did not completely understand why do we need rosout and what's the purpose of using it .

Sincerely,

Dear Members,

Hi Hope you guys are having a good one. I am very new to ROS and trying to understand the architecture. Until now I found it very fascinating and the community is doing a great job. I was looking at different nodes and topics and where I am stuck currently in understanding properly the /rosout topic and rosout node. I have been through the wiki.ros.org but did not understand it completely. That would be great if anyone here can shed some light on it and explain it to me in a more simpler way.

Sincerely, muscles

Hi

Is it possible for more then one ros node to subscribe to the same topic. If yes then what's the maximum number of nodes one ros topic can handle?

Hi I want to implement Follow me on GPS for my quadcopter. ANy ROS package you guys can recommend for my application ?