#define INACTIEF 0
#define OPWARMEN 1
#define POMPEN 2

#define PIN_STARTKNOP 2
#define PIN_GROENELED 5
#define PIN_TEMPLED 4
#define PIN_POMP 11
#define PIN_TEMPSENSOR A0

const float BETA = 3950;

byte statusMachine = INACTIEF;
float celsius;

void setup() {
  Serial.begin(9600);
  pinMode(PIN_STARTKNOP, INPUT_PULLUP);
  pinMode(PIN_GROENELED, OUTPUT);
  pinMode(PIN_TEMPLED, OUTPUT);
  pinMode(PIN_POMP, OUTPUT);
  pinMode(PIN_TEMPSENSOR, INPUT);
  digitalWrite(PIN_GROENELED, HIGH);
}

void loop() {
  //Serial.println(statusMachine);
  switch (statusMachine){
    case INACTIEF:
      buttonCheck();
      break;
    
    case OPWARMEN:
      opwarmen();
      break;
    case POMPEN:
      pompen();
      break;
    default:
      Serial.println("ERROR. Er is iets mis.");
  }
  

}

void buttonCheck(){
  if(digitalRead(PIN_STARTKNOP) == LOW){
    digitalWrite(PIN_GROENELED, LOW);
    statusMachine = OPWARMEN;
  }
}

void opwarmen(){
  celsius = 1 / (log(1 / (1023. / analogRead(PIN_TEMPSENSOR) - 1)) / BETA + 1.0 / 298.15) - 273.15;
  Serial.print(celsius);
  Serial.println("°C");
  if(celsius>50){
    digitalWrite(PIN_TEMPLED, LOW);
    statusMachine = POMPEN;
  } else {
    digitalWrite(PIN_TEMPLED, HIGH);
    statusMachine = OPWARMEN;
  }
  
  }

void pompen(){
  
}



void Temperatuur(){
  
  celsius = 1 / (log(1 / (1023. / analogRead(PIN_TEMPSENSOR) - 1)) / BETA + 1.0 / 298.15) - 273.15;
  
}
/*
const float BETA = 3950; // should match the Beta Coefficient of the thermistor
int analogValue = analogRead(A0);
float celsius = 1 / (log(1 / (1023. / analogValue - 1)) / BETA + 1.0 / 298.15) - 273.15;
*/