/*
Projektname:            LCD Display mit Arduino Ansteuern
Author:                 T.Griese
Software:               Arduino IDE/ Wokwi.com
Hardware:               Arduino Uno Rev3/ Wokwi.com
Beschreibung:           Winkel der Flugzeugtür wird im LCD Display dargestellt. 
Datum:                  09:11.2022
Status:                 in Arbeit
*/

#include <Wire.h>                                           // including the Wire libary
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 16, 2);                              // including the LiquidCrystal_I2C libary

int ledRed1 = 12;
int ledRed2= 11;
int ledGreen = 10;
int GND = 9;
int taster = 8;
unsigned long timerOut = 8000;
unsigned long timer1;
bool statusTaster = false;
int winkel;
int oldwinkel = 0;

byte grad[] = {
  B01100,
  B10010,
  B10010,
  B01100,
  B00000,
  B00000,
  B00000,
  B00000
};

void setup() {
 pinMode(ledRed1, OUTPUT);
 pinMode(ledRed2, OUTPUT);
 pinMode(ledGreen, OUTPUT);
 pinMode(GND, OUTPUT);
 pinMode(taster, INPUT_PULLUP);
 digitalWrite(GND, LOW);
 Serial.begin(9600);
 lcd.init();
 lcd.backlight(); 
 lcd.createChar(0, grad);
}

void loop() 
  {
    winkel = map(analogRead(A0),0,1023,0,90);             // read in the poti value and maps(convert) it in an angle
    if (winkel != oldwinkel)
      {
        lcd.setCursor(0, 0);                                  //set the Cursor to the First row and first sign 
        lcd.print("Die T"); 
        lcd.print("\xF5"); // das ist ein ü
        lcd.print("r ist ");
        lcd.setCursor(12, 0); 
        lcd.print("   ");
        lcd.setCursor(13, 0); 
        lcd.print(winkel);
        lcd.setCursor(15, 0);
        lcd.write(0);
        lcd.setCursor(8, 1); 
        lcd.print("            ");
        lcd.setCursor(0, 1);// In diesem Fall bedeutet (0,1) das erste Zeichen in der zweiten Zeile. 
        lcd.print("ge");
        lcd.print("\xEF"); // das ist ein ö
        lcd.print("ffnet");
      }
    
    if (winkel >=45)                                      // light up the LEDs acording to the angle
      {
        digitalWrite(ledRed1, HIGH);
        digitalWrite(ledRed2, HIGH);
        digitalWrite(ledGreen, LOW);
      }
    else if (winkel<=44 && winkel>=1)
      {
        digitalWrite(ledRed2, HIGH);
        digitalWrite(ledRed1, LOW);
        digitalWrite(ledGreen, LOW);
      }
    else if (winkel<=0)
      {
        digitalWrite(ledGreen, HIGH);
        digitalWrite(ledRed2, LOW);
        digitalWrite(ledRed1, LOW);
      }
    else                                                    // Error Message if the angle is not possible
    
      {
        Serial.println("ERROR Angle not possible");
      }
  
    if (digitalRead(taster)==LOW)                           // check for button press and setting the timer funktion
      {
        timer1 = millis();
        statusTaster = true;
        Serial.println("Türschließung starten");
      }
  
    if(statusTaster && millis() >= timer1 + timerOut)         // check if time runs out
      {
        statusTaster = false;
        timer1 = 0;
    
        if (winkel > 0)                                      // if door is still open give an warning
          {
            Serial.println("WARNING! DOOR STILL OPEN");
            lcd.clear();
            lcd.setCursor(0, 0); 
            lcd.print("WARNING!");
            lcd.setCursor(0, 1);
            lcd.print("DOOR STILL OPEN");
          }
        else if(winkel == 0)
          {
            Serial.println("DOOR IS CLOSED");
            lcd.clear();
            lcd.setCursor(0, 0); 
            lcd.print("DOOR IS CLOSED");
            
          }
      }
    oldwinkel=winkel; 
  }