function s=cmd(spo,command,delayt)

%    SOSI-M2 V1.0 MATLAB M-file
%
% Send command, wait delay, print and return response
%
% Args: s=cmd(spo,command,delayt)
%
% spo: serial port object
% command: text string, see SOSI manual
% delayt: delay in milliseconds between sending command and reading reply
%
% s: reply string from SOSI

    s='';
    fprintf(spo,command);
    pause(delayt)

    while spo.BytesAvailable > 5
        s=fgetl(spo);

% Print non-empty strings after removing ending terminator.
        if length(s) > 4
            disp(s);
        end
    end


%    s=strtok(s1,sprintf('\r\n'));