function read=ReadCommand(serCommand)
% Reads a streaming command module.   If no data, does not wait, returns nans.
%  Note that this code never crashes.

% serial port must first be initialized using initializeComMod
% inputs: serCommand (from initializeComMod)
% Outputs:  none (for now
read = 0;

%% IF THERE IS NO DATA?
if (get(serCommand, 'BytesAvailable')==0)
    disp('Data not avail yet.   Try again or check transmitter.')
    return
else
    
    %% IF THERE IS DATA
    while (get(serCommand, 'BytesAvailable')~=0)
        try
            % read until terminator
            sentence = fscanf(serCommand, '%s');
            Ns = length(sentence);
            disp('Read data!'); %lets us know it worked
            disp(sentence); %displays input
            read = 1;
        catch ERR_MSG
            % if something didn't work correctly the error message displays
            disp('Error Reading Data! Check Unit')
            
        end
        
    end
end