function setsleep(port,T)

%     SOSI-M2 V1.0 MATLAB M-file
%
% Set sleep mode timeout seconds
%
% Args: setsleep(port,T)
%
% port: 'COM2', for example
% T: timeout delay (seconds). Set 0 to disable sleep mode. Max 240 seconds.

delayt=0.1;

% Check input argument
if T>240
    disp('Argument error: T');
    return;
end

try

% Set up port
    spo=serial9600(port);
    wakeupsub(spo);

    fprintf(spo,'#sesl');
    pause(delayt);
    fprintf(spo,num2str(T))
    serialread(spo);
    fclose(spo);
    return;

catch                   % Halt SISO if error
    s=lasterr;
    disp(s);
    fclose(spo);
    return;
end