sorry,those comments is in Chinese ,my english is poor.
I rewrite ,LaunchPad can receive data form the computer using my GUI soft ,not only send data to computer.
the GUI written by me is also funny,you can try it,it can run with your language of english automatically.
calibration data is computed by the GUI, then send to LaunchPad .
but ,tool menu of GUI is also only written in Chinese,sometimes,i will rewrite it in english.
now too later,i would like to go to bed.