/*
  Conditionals - If statement

 This example demonstrates the use of if() statements.
 It reads the state of a potentiometer (an analog input) and turns on an LED
 only if the LED goes above a certain threshold level. It prints the analog value
 regardless of the level.

 The circuit:
 * potentiometer connected to analog pin 0.
 Center pin of the potentiometer goes to the analog pin.
 side pins of the potentiometer go to +5V and ground
 * LED connected from digital pin 13 to ground

 * Note: On most Arduino boards, there is already an LED on the board
 connected to pin 13, so you don't need any extra components for this example.

 created 17 Jan 2009
 modified 9 Apr 2012
 by Tom Igoe

This example code is in the public domain.

http://arduino.cc/en/Tutorial/IfStatement

 */

// These constants won't change:
const int analogPinA = A0;    // pin that the sensor is attached to
const int ledPinUP = 6;       // pin that the Shift Up Relay is attached to
const int analogPinB = A1;    // pin that the sensor is attached to
const int ledPinDOWN = 5;       // pin that the Shift Down Relay is attached to
const int analogPinC = A2;    // pin that the sensor is attached to
const int ledPinBUZZER = 3;       // pin that the Shift Buzzer is attached to
const int ledPinON = 7; // pin that activates initial changeover relay
const int threshold = 400;   // an arbitrary threshold level that's in the range of the analog input

void setup() {
  // initialize the LED pin as an output:
  pinMode(ledPinUP, OUTPUT);
    // initialize the LED pin as an output:
  pinMode(ledPinDOWN, OUTPUT);
      // initialize the LED pin as an output:
  pinMode(ledPinBUZZER, OUTPUT);
  // initialise LED Pin as output:
  pinMode (ledPinON, OUTPUT);
  // initialize serial communications:
  Serial.begin(9600);
}

void loop() {
  digitalWrite(ledPinON, LOW);
  // read the value of the potentiometer:
  int analogValueA = analogRead(analogPinA);

  // if the analog value is high enough, turn on the LED:
  if (analogValueA >750 && analogValueA <920) {
    digitalWrite(ledPinUP, LOW);
  }
  else {
    digitalWrite(ledPinUP,HIGH);
  }
    // read the value of the potentiometer:
  int analogValueB = analogRead(analogPinB);

  // if the analog value is high enough, turn on the LED:
  if (analogValueB >320 && analogValueB <420) {
    digitalWrite(ledPinDOWN, LOW);
  }
  else {
    digitalWrite(ledPinDOWN,HIGH);
  }
    // read the value of the potentiometer:
  int analogValueC = analogRead(analogPinC);

  // if the analog value is high enough, turn on the LED:
  if (analogValueC >320 && analogValueC <920) {
    digitalWrite(ledPinBUZZER, LOW);
  }
  else {
    digitalWrite(ledPinBUZZER,HIGH);
  }

  // print the analog value:
  Serial.println(analogValueA);
  delay(1);        // delay in between reads for stability
}