Using Try/For loop to allocate correct serial port number

I am trying to create a code that will read the correct serial port for my device no matter what number the COM port is on the device I am connected. This code will be ran on multiple laptops/PCs and eventually created in to a GUI so I want to make sure I won't have to come back and edit this part of teh code again. From looking at google, on a PC there won't be more than 100 USB Serial COM ports hence I would like the code to try from COM1 to COM100. The reason I have used the try and catch functions in a for loop is beacsue the code will fail if it doesn't get the correct port.

This is the code that I have at the minute:

%%

clear all

close all

clc

%% conecting to serialport

ports1_9 = ['COM1','COM2','COM3','COM4','COM5','COM6','COM7','COM8','COM9']

ports10_20 = ['COM10','COM11','COM12','COM13','COM14','COM15','COM16','COM17','COM18','COM19','COM20']

Ports1_9 = regexp(ports1_9,'\COM[123456789]','match')

Ports10_20 = regexp(ports10_20,'\COM1[123456789]','match')

%%

for a = 1:9

try

ND280 = serialport(Ports1_9{a},9600,'Parity','None','DataBits',8,'StopBits',1,'FlowControl','software');

catch

warning('Locating correct Port')

try

ND280 = serialport(Ports10_20{a},9600,'Parity','None','DataBits',8,'StopBits',1,'FlowControl','software');

catch

warning('Locating correct Port')

end

end

end

This code does work however I am sure it isn't the most efficient method and as I want to get all the way up to COM100 and maybe more I need the help!

Answer 1

[Fangjun Jiang]

See help document for "break" and "continue"

for k=1:100
    port=sprintf('COM%d',k);
    try
        ND280 = serialport(port,...);
        break; % successful, break the loop
    catch
        % not successful, continue searching for port
        disp('Continue searching for port')
        continue;
    end
end % for-loop

[Fangjun Jiang]

"continue" is actually not required here

[Joseph]

Thank you so much, that worked a dream.