How can I get the available serial com port automatically?

After using this command instrhwinfo ('serial'), I get the available serial port name. Then I have to manually input it like- s = serial('COM5','BaudRate',9600). But how Can I automatically detect and use it without any manual edit inside the code?

Answer 1

[Walter Roberson]

info = instrhwinfo('serial');
if isempty(info.AvailableSerialPorts)
   error('No ports free!');
end
s = serial(info.AvailableSerialPorts{1}, 'BaudRate', 9600);

Unfortunately it would be common that this will not do what you want. Typically you want to find the serial port that a specific kind of device is on, not just any available serial port. Like if you have an older system that has a PS2 mouse connector no longer in use, that might show up as a serial port like COM2, but you would probably be more interested in finding an arduino or serial over USB port.

Perhaps https://www.mathworks.com/matlabcentral/fileexchange/45675-identify-serial-com-devices-by-friendly-name-in-windows might help.

[Jack Nguyen]

so if I would like to use the output answer to input data and graph, what will be the way to do it in my code?

I was trying to write:

info = instrhwinfo('serial');
if isempty(info.AvailableSerialPorts)
   error('No ports free!');
end
s = serial(info.AvailableSerialPorts{1}, 'BaudRate', 9600);
open_data = fopen(s)
line = fgetl (open_data)
scan_line = sscanf (line, '%f,%f,%f) (depending on the output)
% it returns as too many argument open_data = fopen(s)

[Walter Roberson]

fopen(s)
line = fgetl(s);

Answer 2

[MD RAQUIBUZZAMAN]

I totally agree with you about it. Thank you for the reply. I will look for the link.