#include <LiquidCrystal.h>
#include <dht.h>

dht DHT;

#define DHT22_PIN 5
#define COOLER_PIN 2
#define HEATER_PIN 3

struct {
  uint32_t total;
  uint32_t ok;
  uint32_t crc_error;
  uint32_t time_out;
  uint32_t connect;
  uint32_t ack_l;
  uint32_t ack_h;
  uint32_t unknown;
} stat = { 0, 0, 0, 0, 0, 0, 0, 0};

LiquidCrystal lcd(12, 11, 10, 9, 8, 7);

void setup() {
  lcd.begin(16, 2);
  lcd.print("Temperature:");
  Serial.begin(115200);
  Serial.println("dht22_test.ino");
  Serial.print("LIBRARY VERSION: ");
  Serial.println(DHT_LIB_VERSION);
  Serial.println();
  Serial.println("Type,\tstatus,\tHumidity (%),\tTemperature (C)\tTime (us)");

  pinMode(COOLER_PIN, OUTPUT);
  pinMode(HEATER_PIN, OUTPUT);
}

void loop() {
  float temp = 16;
  int increment = 1; // 1 for increasing temperature, -1 for decreasing temperature

  while (true) {
    lcd.setCursor(0, 1); // Set cursor to the second line
    lcd.print("                "); // Clear previous temperature value

    Serial.print("DHT22, \t");
    uint32_t start = micros();
    
    // Simulated temperature change
    // Change this value to simulate different temperatures
    DHT.temperature = temp; // Set temperature to the incremented value
    
    int chk = DHTLIB_OK; // Simulate successful reading

    uint32_t stop = micros();

    stat.total++;
    switch (chk)
    {
      case DHTLIB_OK:
        stat.ok++;
        Serial.print("OK,\t");
        break;
      case DHTLIB_ERROR_CHECKSUM:
        stat.crc_error++;
        Serial.print("Checksum error,\t");
        break;
      case DHTLIB_ERROR_TIMEOUT:
        stat.time_out++;
        Serial.print("Time out error,\t");
        break;
      case DHTLIB_ERROR_CONNECT:
        stat.connect++;
        Serial.print("Connect error,\t");
        break;
      case DHTLIB_ERROR_ACK_L:
        stat.ack_l++;
        Serial.print("Ack Low error,\t");
        break;
      case DHTLIB_ERROR_ACK_H:
        stat.ack_h++;
        Serial.print("Ack High error,\t");
        break;
      default:
        stat.unknown++;
        Serial.print("Unknown error,\t");
        break;
    }

    // DISPLAY DATA
    Serial.print(DHT.humidity, 1);
    Serial.print(",\t");
    Serial.print(DHT.temperature, 1);
    Serial.print(",\t");
    Serial.print(stop - start);
    Serial.println();

    // Print temperature on LCD
    lcd.setCursor(0, 1); // Set cursor to the second line
    lcd.print("Temp: ");
    lcd.print(DHT.temperature, 1);
    lcd.print(" C");

    // Default behavior for cooler and heater
    if (DHT.temperature > 25) {
      digitalWrite(COOLER_PIN, HIGH);
      digitalWrite(HEATER_PIN, LOW);
      lcd.setCursor(0, 0);
      lcd.print("Cooler enabled  ");
    } else if (DHT.temperature < 20) {
      digitalWrite(COOLER_PIN, LOW);
      digitalWrite(HEATER_PIN, HIGH);
      lcd.setCursor(0, 0);
      lcd.print("Heater enabled  ");
    } else {
      digitalWrite(COOLER_PIN, LOW);
      digitalWrite(HEATER_PIN, LOW);
      lcd.setCursor(0, 0);
      lcd.print(" Normal Temp ");
    }

    // Increment or decrement temperature
    temp += increment;

    // Change direction if reaching boundaries
    if (temp >= 29 || temp <= 16) {
      increment *= -1;
    }

    if (stat.total % 20 == 0)
    {
      Serial.println("\nTOT\tOK\tCRC\tTO\tCON\tACK_L\tACK_H\tUNK");
      Serial.print(stat.total);
      Serial.print("\t");
      Serial.print(stat.ok);
      Serial.print("\t");
      Serial.print(stat.crc_error);
      Serial.print("\t");
      Serial.print(stat.time_out);
      Serial.print("\t");
      Serial.print(stat.connect);
      Serial.print("\t");
      Serial.print(stat.ack_l);
      Serial.print("\t");
      Serial.print(stat.ack_h);
      Serial.print("\t");
      Serial.print(stat.unknown);
      Serial.println("\n");
    }
    delay(2000); // Wait for 2 seconds
  }
}
//code for Niko Melikidze