/* Use ESP32 to read temperature values of DHT11.
   Control the on/off cycles of a fan (actuator) by threshold values.
*/

/* Slowly combining parts of the code.
   Heating & lighting components, no MQTT.
*/
#include "DHT.h"
#include <Adafruit_Sensor.h>


int light = 15; //LDR readings taken and stored at pin A0.
int DHTPIN = 4; //DHT pin to store and take readings at A1.

int LEDPIN_1 = 27;  //LED pins used to react to light value differences.
int LEDPIN_2 = 14;
int FAN = 26; //Fan to simulate actuator heat pump, reacts to temperature input.

#define DHTTYPE DHT11 // defining DHT type for ESP32 and scope in general.
DHT dht(DHTPIN, DHTTYPE);


void setup() {
  Serial.begin(9600); //initiate serial.
  Serial.print(F("DHT11 Test"));
  dht.begin();

  pinMode(15, INPUT);  //setting LDR pin as input.
  pinMode(LEDPIN_1, OUTPUT); //Setting LEDs as outputs, since they are reacting to incoming light data
  pinMode(LEDPIN_2, OUTPUT);
}

void loop() {
  //DHT
  int temperature = dht.readTemperature(); // read Temperature in °C

  Serial.print(temperature);
  String temperatureString = String(temperature);

  //Serialprintln(hic);
  Serial.println(F("°C"));
  delay (2000);

  Serial.println("The string equivalent to integer temperature is " + temperatureString);
  char* TempArr = &temperatureString[0];
  //Serial.println(TempArr);

  //Fan off-on cycle
  if (temperature > 30) {
    Serial.println("Its becoming hot in here - The fan is on");
    digitalWrite(FAN, HIGH);
  }
  else {
    Serial.println("ITs cold or tolerable; lets save money!");
    digitalWrite(FAN, LOW);
  }



  //LDR
  light = analogRead(15); //read light value from LDR in Ohms EVALUATE SHOUÖD LIGHT NOT 15
  Serial.println(light);

  if (light < 1300) {
    Serial.println("It very bright, lots of natural light");
    Serial.println("Both LEDs are off");
    digitalWrite(LEDPIN_1, LOW);
    digitalWrite(LEDPIN_2, LOW);
  }
  else if (light > 1300 && light  < 2500) { //medium amount of light to show one LED at a time).
    Serial.println("moderate light quantity, quite cloudy");
    digitalWrite(LEDPIN_1, HIGH);
    digitalWrite(LEDPIN_2, LOW);
  }
  else { // both LEDs turn on when the surroundings are dark.
    Serial.println("Its very dark, extremely overcast or night time");
    digitalWrite(LEDPIN_1, HIGH);
    digitalWrite(LEDPIN_2, HIGH);
  }
  delay(750); //750ms delay between sensor readings.
}