#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27,16,2);

const int swReset = 2;
const int ledLila = 3;
const int ledRed = 4;
const int ledYel = 5;
const int ledGreen = 6;         


 

int adc = 6;    
int umin = 6;    
int pwm = 6;
int fnot = 6;
int fblink = 6;

void setup() {
  attachInterrupt(digitalPinToInterrupt(swReset), ISR_Reset, FALLING);
  pinMode(swReset, INPUT_PULLUP);
  pinMode(ledLila, OUTPUT);
  pinMode(ledRed, OUTPUT);
  pinMode(ledGreen, OUTPUT);
  pinMode(ledYel, OUTPUT);
  
  setLed(0,0,0);

  lcd.init();                     
  lcd.backlight();
  lcd.setCursor(0,0);
  lcd.print(" Leistungstest");
  
  lcd.setCursor(4,1);
  lcd.print("My Name");
  delay(5000);
  lcd.clear();
  
}

void loop() {
   
  if(fnot)
  {
    lcd.setCursor(0,0);
    lcd.print("Notabschaltung!!!");
    setLed(1,1,1);
  }
  else
  {
    lcd.setCursor(0,0);
    lcd.print("Drehzahl:        ");
    
    adc = analogRead(A0);
    umin = map(adc,0,1023,0,500);
    pwm = map(adc,0,1023,0,255);
    
    calcLed(umin);
    
    lcd.setCursor(0,1);
    lcd.print(umin);
    lcd.print(" U/min  ");
    analogWrite(ledLila,pwm);
  }
}  

void calcLed(int u)
{
    if(u==0)setLed(0,0,0);
    if((u>0) && (u<=400))setLed(0,0,1);
    if((u>400) && (u<450))setLed(0,1,0);
    if(u>=450)setLed(1,0,0);
    if(u==500)fnot = 1;
}

void setLed(int valR,int valY,int valG)
{
    digitalWrite(ledRed,valR);
    digitalWrite(ledYel,valY);
    digitalWrite(ledGreen,valG);
}
void ISR_Reset()
{
    fnot = 0; 
}