I amcurrently studyingCPGEand I would liketo use abuzzerpiezoshock sensorand I knowabsolutely nothing aboutArduinoorits programming.Iinspiredthis sitehttp://www.mon-club-elec.fr/pmwiki_mon_club_elec/pmwiki.php?n=MAIN.ArduinoExpertCanPiezoEnCapteur#toc2,but I have someconcerns thatappearat the program Processing Heshows "NullPointException"andhighlights"cwl.hideCoordinates() ;// hidedetails" WholesaleProcessingis receivingvaluesArduinobut donot want todeal with. Ifyou could explainthe problemor offera programthat works well.Thank you.
