Error using serial/fopen

Hi to all, Im trying to open serial port on matlab (on Linux Tumbleweed 64) and I check first:

1) Im in the dialout group

2)instrfind

3)chmod +777 /root/lock

and matlab keeps giving me "Error using serial/fopen (line 72)

Open failed: Port: /dev/ttyUSB0 is not available. No ports are available."

why?

Im writing code in app designer and don't know how to solve it in code.

Thanks

Answer 1

[Govind KM]

Hi Gaston,

A possible reason for the "No ports are available" error is that MATLAB only automatically recognizes serial port names of the form "/dev/ttyS[0-255]". If the serial port has a different name, it can be identified in MATLAB by modifying the "java.opts" file or by creating a symbolic link to a conventionally named port. More details can be found in the following MATLAB Answers post:

https://www.mathworks.com/matlabcentral/answers/95024-why-is-my-serial-port-not-recognized-with-matlab-on-linux-or-solaris

The error could also be caused by permission issues in Linux, in which case please try the workarounds mentioned in this MATLAB Answer:

https://www.mathworks.com/matlabcentral/answers/229181-serial-communication-in-maltab-using-linux-64-bit

Hope this is helpful!