Serial to SerialPort Object conversion

Im porting my RS232 code from serial to the new serialport as suggested in 2019b.

I had previously used to check if any ports are open and if they are then close via:

     if ~isempty(instrfind)
     fclose(instrfind);
     delete(instrfind);
     delete(s)   % s is my serial object (s=serial('Com1', etc...))
     end

The documentation suggests not to use instrfind but serialportlist.

How would the above be achieved using this new command?

I also ran into an error using fopen & fclose with the new serialport object, but fortunately found this post from Walter!

The new serialport() interface does not use fopen() or fclose() . You just delete the object to close it.

I prefer the fopen() / fclose() interface myself... but then I used to write modem control programs where it was common to want to configure a port and open and close it while not deleting it.