Hi people, i need help 
, I'm trying to use this sketch to send rpm data from arduino to this application, but do not understand how data is sent , if I could explain how it works this is the part would greatly appreciate (explanation to children xD) XD XD XD XD XD XD
byte GetdataByte() {
static byte i=0;
i +=5;
if(i >100) i = 0;
return i;