int D=1000,ND=0;
int mode=0;
void serialEvent() {
while (Serial.available()) {
char inc = (char)Serial.read();//將byte轉成 char
if (mode==0 && inc=='S') {
mode=1; ND=0;
}
if (mode==1 && inc=='E'){
D=ND;
mode=0;
ND=0;
Serial.print("now D=");
Serial.println(D);
}
if (mode==1 &&(inc>='0'&& inc<='9')){
ND=ND*10+(inc-'0');
}
}
}