Query the crs 'optical' photometer
pyoptical [-i interval] [-n number ] [-r] com-port
--version
show program's version number and exit
-h, --help
show this help message and exit
-i INTERVAL, --interval=INTERVAL
the measurement interval in ms, default is as fast as possible
-n NUMBER, --number=NUMBER
number of measurements to make, default is endless
-r, --robust
when encountering an error, try to continue ignoring as many exceptions as possible