#include <Arduino.h>
#include <HardwareTimer.h>
#include <DHT.h>


HardwareTimer *MyTim = new HardwareTimer{TIM3};

#define TempAnalog PA1
#define ledGreen D10
#define ledRed D11


DHT dht(TempAnalog, DHT22);

volatile bool messungON = 0; // 1 = ON
int tempHOT = 25; // in °C
float temperature = 0;

void messung_isr() {
  messungON = 1;
}




void setup() {
  // put your setup code here, to run once:
  MyTim->setPrescaleFactor(1400);
  MyTim->setOverflow(60000); // Ovf = 1 s
  MyTim->attachInterrupt(messung_isr);
  MyTim->resume();

  pinMode(TempAnalog, INPUT_ANALOG);
  pinMode(ledGreen, OUTPUT);
  pinMode(ledRed, OUTPUT);

  Serial.begin(9600);
  dht.begin();
}

void loop() {
  // put your main code here, to run repeatedly:
  if (messungON) {
    messungON = false; // Flag zurücksetzen
    temperature = dht.readTemperature(); // float number 0.0
  }

  Serial.printf("Temperatur: %.1f °C\n", temperature);
  
  if (temperature<= tempHOT) {
    digitalWrite(ledRed, 0);
    digitalWrite(ledGreen, 1);
    Serial.print("Ventilator aus\n");
  }
  else if (temperature>= tempHOT) {
    digitalWrite(ledRed, 1);
    digitalWrite(ledGreen, 0);
    Serial.print("Ventilator ein\n");
  }
}