//read an analog input and send the results out the serial port


int led = 13;//create a variable to hold the pin the LED is connected to
int pot = 0;//create a variable to hold the pin the potentiometer/sensor is connected to
int analogVal = 0;//create a variable to hold the analog value read from the potentiometer/sensor
int oldVal = 0;//create a variable to keep track of the last value read from the potentiometer/sensor

void setup(){
 pinMode(pot, INPUT);//set the pin the potentiometer/sensor is connected to
  Serial.begin(9600);//start serial communication at 9600baud
  startBlink();//call the startBlink function to blink an LED at the begining of the program 
}


void loop(){

  analogVal = analogRead(pot);//read the analog pin that the potentiometer/sensor is connected to and store the value in the analogValue variable  
  analogVal /= 2; //divide the analogValue by 2 to get rid of any flutter on the last bit of the analogValue, this reduces the resolution, but creates a more steady reading
  if(analogVal != oldVal){//compare the current analodValue to the old analog value, if they are not equal(!=) then...
  Serial.println(analogVal);//send the analogValue out the serial port
  oldVal = analogVal;//set the old analog value equal to the current analog value
  }
  delay(10);//wait 10ms
}




void startBlink(){
  pinMode(led, OUTPUT);

  for(int i = 0; i < 4; i++){
    digitalWrite(led, HIGH);
    delay(250); 
    digitalWrite(led, LOW);
    delay(250);
  }
}