Error in getting start with ROS on Raspberry

Hello,

I'm trying to follow the Matlab example here https://it.mathworks.com/help/supportpkg/raspberrypi/ref/getting-started-with-robot-operating-system-ros-on-raspberry-pi-r.html

but I have some issues.

Raspberry got the latest image from Matlab and got ROS melodic installed following this procedure https://it.mathworks.com/help/supportpkg/raspberrypi/ug/install-ros-melodic-on-raspberry-pi.html

As can be seen, when I run it should display raspberry as subscriber but it doesn't.

I think this is why also the message 'Hello Raspberry? is not detected by Raspberry.

What is the error I made?

Should I download ROS melodic also in my windows PC?

thank you

[Prasanth Sunkara]

Hi Silvia,

To me it looks like you already have ROS installed on both PC and Raspberry Pi.

This seems more of a connection issue. Couple of things to check:

a) Is your Pi in the same network as PC? I mean are they connected to same network? Is it wired LAN or WiFi?

b) Windows is known to blocking ROS connections sometimes. Some firewall settings. I have seen many users able to solve this problem, by setting their network to Private from Public (public seems default on Windows). See this link. Alternately try running MATLAB and ROS on a Linux machine if possible. Linux is more ROS friendly than Windows in general

Thanks,

Prasanth

[Silvia Della Torre]

Hello,

Pi and PC are on the same network.

I solved the problem setting the network from Pubblic to Private.

Now I have a problem with task 2 of this link https://it.mathworks.com/help/supportpkg/raspberrypi/ref/getting-started-with-robot-operating-system-ros-on-raspberry-pi-r.html . I follow all the instruction but I have this error when I try to Build&Run

All the test connections work well. I don't have any web camera or audio card connected. so why the ros node not starts?

Do I have to generate the node in other way? It should be created when I run Build and Run, isn't it?

thank you