#include <Adafruit_Sensor.h>
#include <DHT.h>
#include <DHT_U.h>

#define DHTPIN 4 // Pin where the DHT22 is connected
#define DHTTYPE DHT22 // DHT sensor type

#define RED_PIN 9
#define GREEN_PIN 10
#define BLUE_PIN 11
#define BUZZER_PIN 3

DHT_Unified dht(DHTPIN, DHTTYPE);

void setup() {
  Serial.begin(9600);
  dht.begin();
  pinMode(RED_PIN, OUTPUT);
  pinMode(GREEN_PIN, OUTPUT);
  pinMode(BLUE_PIN, OUTPUT);
  pinMode(BUZZER_PIN, OUTPUT);
  noTone(BUZZER_PIN); // Ensure the buzzer is initially off
}

void loop() {
  sensors_event_t event;
  dht.temperature().getEvent(&event);
  float temperature = event.temperature;

  if (!isnan(temperature)) {
    Serial.print("Temperature: ");
    Serial.println(temperature);

    if (temperature < 18.0) {
      // Set the RGB LED to blue
      setColor(0, 0, 255);
    } else if (temperature >= 18.0 && temperature <= 30.0) {
      // Set the RGB LED to yellow
      setColor(255, 255, 0);
    } else {
      // Set the RGB LED to red
      setColor(255, 0, 0);
    }

    if (temperature > 40.0) {
      // Trigger the buzzer when temperature is greater than 40 degrees
      tone(BUZZER_PIN, 1000); // You can adjust the tone frequency
    } else {
      noTone(BUZZER_PIN); // Turn off the buzzer
    }
  } else {
    Serial.println("Failed to read temperature from the sensor.");
  }

  delay(2000); // You can adjust the delay as needed
}

void setColor(int red, int green, int blue) {
  analogWrite(RED_PIN, red);
  analogWrite(GREEN_PIN, green);
  analogWrite(BLUE_PIN, blue);
}