How to select available COM-port from a table and input this in a serialport() function using MatLab App Designer?

Hello, i have designed a app in MatLab App Designer and need to be able to select a COM port.

The data is recieved from the serialportlist() function as shown below:

function RefreshButtonPushed(app, event)
            freeport = serialportlist("available");
            freeport = freeport';
            app.UITable.Data = freeport;
end

The user can click the different rows to select the desired COM-port and the selection is saved in port.

function UITableCellSelection(app, event)
            global port
            port = event.Indices;
        end

The selected port is then supposed to be put into the function serialport("COM#",115200). My problem is that i cannot figure out how to make the selected port appear in the "COM#". The selected port only outputs:

Error using serialport (line 116)

Unable to connect to the serialport device at port '2 1'. Verify that a device is connected to the port, the port is not in use, and all serialport input arguments and parameter values are supported by the device.

        function Mode2ButtonPushed(app, event)
            global s2;
            global mode2;
            global port;
            
            formatSpec = "%s";
            A1 = num2str(port);
            str = sprintf(formatSpec,A1);
            
            mode2 = 2;
            s2 = serialport(str,115200);
            
            write(s2,mode2,"uint8");
            delete(s2);
            clear s2;
            
        end

[Jørgen Sørebø Myhre]

I am only able to extract the row and column of the selected window inside the table. How can i actually extract "COM3" and "COM5"?

Answer 1

[Jørgen Sørebø Myhre]

I managed to solve the issue myself. First i made the global port point to the selected row and column as shown below:

function UITableCellSelection(app, event)
            global port
            indices = event.Indices;
            data = app.UITable.Data;
            row = indices(:,1);
            port = app.UITable.Data(row,:);
end

In the mode button i made put the global port inside the serialport() function.

function Mode1ButtonPushed(app, event)
            global s1;
            global mode1;
            global port;
            
            mode1 = 1;
            s1 = serialport(port,115200);
            
            write(s1,mode1,"uint8");
            delete(s1);
            clear s1;
            
        end