int LED = 13;
char val;
void setup(){
pinMode(LED, OUTPUT);
Serial.begin(9600);
}
void loop(){
//send sensor data to PC
Serial.println(analogRead(A0));
//read commands from PC
if(Serial.available()){
val = Serial.read();
if ( val == '1'){ // command 1 for LED ON
digitalWrite(LED, HIGH);
}
else if (val == '0'){ // command 0 for LED OFF
digitalWrite(LED, LOW);
}
}
}