#include <DHT.h>

#define DHTPIN 25
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);

#define TRIG_PIN 15
#define ECHO_PIN 2

#define PIR_PIN 19
#define PIR_LED 18

// LEDs
#define LED_GREEN 14
#define LED_YELLOW 12
#define LED_RED 13

void setup() {
  Serial.begin(115200);
  dht.begin();

  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
  
  pinMode(PIR_PIN, INPUT);
  pinMode(PIR_LED, OUTPUT);

  pinMode(LED_GREEN, OUTPUT);
  pinMode(LED_YELLOW, OUTPUT);
  pinMode(LED_RED, OUTPUT);
}

void loop() {
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();

  if (isnan(temperature) || isnan(humidity)) {
    Serial.println("Failed ");
  } else {
    Serial.print("T: ");
    Serial.print(temperature);
    Serial.println(" °C");

    Serial.print("H: ");
    Serial.print(humidity);
    Serial.println(" %");
    if (temperature < 32 && humidity < 65) {
      digitalWrite(LED_GREEN, HIGH);
      digitalWrite(LED_YELLOW, LOW);
      digitalWrite(LED_RED, LOW);
    } else if (temperature < 32 && humidity >= 65) {
      digitalWrite(LED_GREEN, LOW);
      digitalWrite(LED_YELLOW, HIGH);
      digitalWrite(LED_RED, LOW);
    } else {
      digitalWrite(LED_GREEN, LOW);
      digitalWrite(LED_YELLOW, LOW);
      digitalWrite(LED_RED, HIGH);
    }
  }

  if (digitalRead(PIR_PIN) == HIGH) {
    digitalWrite(PIR_LED, HIGH);
    Serial.println("Motion detected!");
  } else {
    digitalWrite(PIR_LED, LOW);
  }

  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);
  long duration = pulseIn(ECHO_PIN, HIGH);
  float distance = duration * 0.034 / 2;
  Serial.print("Distance: ");
  Serial.print(distance);
  Serial.println(" cm");

  delay(2000);
}