/*
  Rotary Encoder Demo
  rot-encode-demo.ino
  Demonstrates operation of Rotary Encoder
  Displays results on Serial Monitor
  DroneBot Workshop 2019
  https://dronebotworkshop.com
*/
 
 // Rotary Encoder Inputs
 #define inputCLK 5
 #define inputDT 4
 
 // LED Outputs
 #define ledCW 8
 #define ledCCW 9
 #define Ledpin 2
 int counter = 0; 
 int currentStateCLK;
 int previousStateCLK; 

 String encdir ="";

 void setup() { 
   
   // Set encoder pins as inputs  
   pinMode (inputCLK,INPUT_PULLUP);
   pinMode (inputDT,INPUT_PULLUP);
   
   // Set LED pins as outputs
   pinMode (ledCW,OUTPUT);
   pinMode (ledCCW,OUTPUT);
   pinMode (Ledpin,OUTPUT);
   
   // Setup Serial Monitor
   Serial.begin (9600);
   
   // Read the initial state of inputCLK
   // Assign to previousStateCLK variable
   previousStateCLK = digitalRead(inputCLK);

 } 

 void loop() { 
  
  // Read the current state of inputCLK
   currentStateCLK = digitalRead(inputCLK);
    
   // If the previous and the current state of the inputCLK are different then a pulse has occured
   if (currentStateCLK != previousStateCLK){ 
       
     // If the inputDT state is different than the inputCLK state then 
     // the encoder is rotating counterclockwise
     if (digitalRead(inputDT) != currentStateCLK) { 
       counter --;
       if (counter<0){
        counter = 0;
       }
       encdir ="CCW";
       digitalWrite(ledCW, LOW);
       digitalWrite(ledCCW, HIGH);
       
     } else {
       // Encoder is rotating clockwise
       counter ++;
       if (counter>30){
        counter = 30;
       }
       encdir ="CW";
       digitalWrite(ledCW, HIGH);
       digitalWrite(ledCCW, LOW);
       
     }
     
      switch (counter) {
  case 0:
    Serial.println("Landsort");
    break;
  case 2:
    Serial.println("Öland södra udde");
    digitalWrite(Ledpin, HIGH);
    delay (700);
    digitalWrite(Ledpin, LOW);
    delay(1400);
    digitalWrite(Ledpin, HIGH);
    delay(700);
    digitalWrite(Ledpin, LOW);
    delay(5000);
    break;
  case 4:
    Serial.println("Morups tånge");
    break;
  case 6:
    Serial.println("Häradskär");
    break;
  case 8:
    Serial.println("Kullen");
    break;
  case 10:
    Serial.println("Hallands väderö");
    break;
  case 12:
    Serial.println("Gotska sandön");
    break;
  case 14:
    Serial.println("Pite-Rönnskär");
    break;
  case 16:
    Serial.println("Bergudden");
    break;
  case 18:
    Serial.println("Hjortens udde");
    break;
  case 20:
    Serial.println("Stavik");
    break;
  case 22:
    Serial.println("Svartklubben");
    break;
  case 24:
    Serial.println("Grönskär");
    break;
  case 26:
    Serial.println("Bönan");
    break;
  case 28:
    Serial.println("Vinga");
    break;
  case 30:
    Serial.println("Örskär");
    break;
      }
     
     Serial.print("Direction: ");
     Serial.print(encdir);
     Serial.print(" -- Value: ");
     Serial.println(counter);
   } 
   // Update previousStateCLK with the current state
   previousStateCLK = currentStateCLK; 
 }