Ros Raspberry Arduino Due Serial Communication ?

Hi,

I am using Raspi Pi4 and Arduino Due with serial communication.

I can send command from Raspi to Dc motor in Arduino and receieve sensor Data from Arduino to Raspi.

I am also using another program to work with Ros in Raspi, also it works fine.

Now, the aim is to use the Data aquired from sensor in Arduino Due (Data that are in Serial com in Raspi),

in Raspi to share that in Ros Noeud.

I get the error in puicture in attachement.

Could someone help to reslve that ?

Many thanks by advance.

[chrisw23]

I had to set RtsEnable explicitly for Arduino Due communication. I don't know if this is an option for you.

[Hocine YAKOUBI]

The is no problem for serial communication between Pi4 and arduino Due.

The problem is when i try deploy my program on PI4 and added Ros noued.

[Hocine YAKOUBI]

I found Ros Deserialise Block, it can be a solution for the problem.

The example I found is with UDP data,so if anyone know how to use that with serial Data it will help ?

@Pablo Romero

[Pablo Romero]

Try running rosinit in the MATLAB command window before building the model.

[Hocine YAKOUBI]

Ros was running before i tried deploy, the problem Come when i try deploy and Pi4 serial connected, if Pi4 serial not connected...the deploy Work nice

[Prasanth Sunkara]

Hi @Hocine YAKOUBI

Could you please try updating the "/etc/environment" file on Pi as shown below?

1) Go to Pi's terminal

2) sudo nano /etc/environment

3) Add the below code to the end of that file.

MW_ROSDISTRO=melodic

Note: if you have installed a different version of ROS, instead of melodic, please update the above line accordingly.

Ideally, ROS would get installed at /etc/ros/<version>

Please give it a try

Thanks,

Prasanth

[Hocine YAKOUBI]

Hi @Prasanth Sunkara,

Thanks your answer.

My problem not come from Ros itself, because I can deploy Ros programm on my Pi4.(MW_ROSDISTRO=melodic is set correctly because I used Mathworks image for Raspi Os).

The problem come when I connect my serial read block to bus assigment,see picture in attachement withouth connecting the delpoy work and no problem.

The solution would be a serial decoder or deserilize block to send Data from serial Block to publish block !!

So, the question is : what block should I use de link serial block to ros publish block ?

Thanks again