//---------------------------------------------------------------------
//     Arduino code: Serial_Send_Analog
//     Demonstrates sending data (ASCII) to the serial port
//---------------------------------------------------------------------
/*   Hardware Setup- a voltage divider connected to analog pin 0:
 *   1) -Wire a photoresister between +5vdc and an empty row on the breadboard
 *   2) -Wire a 10k resistor between that same row on the breadboard to ground.
 *   3) -Jumper wire from that same row to analog pin "A0"
 *   4) -Wire an LED thru a 330 ohm resistor from digital pin 7 to gnd
 *
 *-------------------------------------------------------------------------*/
#include 

int analogPin = A0;            // Variable for which analog pin to read
int LEDpin = 7;                // Variable for which pin for LED
int analogValue = 0;           // Variable for storing analog readings

void setup() {
  Serial.begin(9600);         // start serial port at 9600 bps:
  pinMode(LEDpin, OUTPUT);    // sets pin  as output   
}

void loop()
{
  // read digital input, remap 10-bit value to 8-bit:
  analogValue = analogRead(analogPin); 
  analogValue = map(analogValue, 0, 1023, 0, 255); // Scale data to 1-255
  if(analogValue < 180) {        // If light level is below  180
  digitalWrite(LEDpin, HIGH);    // Turn on LED
  } else {  
  digitalWrite(LEDpin, LOW);  
  }
  Serial.println(analogValue);   // Send analogValue to serial port (USB)
  delay(10);                     // pause for 10 milliseconds        
}