#include <DHTesp.h>

const int pin = 15; // DHT sensor data pin
const int trig = 12; // Ultrasonic sensor trigger pin
const int echo = 14; // Ultrasonic sensor echo pin
const int ledPin = 13; // LED pin

DHTesp dhtsensor;
TempAndHumidity data;
float duration;
float distance;

void setup() {
  Serial.begin(115200); // Set serial communication speed
  dhtsensor.setup(pin, DHTesp::DHT22); // Initialize DHT sensor
  pinMode(trig, OUTPUT); // Set trigger pin as output
  pinMode(echo, INPUT); // Set echo pin as input
  pinMode(ledPin, OUTPUT); // Set LED pin as output
}

float getDistance() {
  digitalWrite(trig, LOW); // Trigger low pulse
  delayMicroseconds(2); // Short delay
  digitalWrite(trig, HIGH); // Send trigger pulse
  delayMicroseconds(10); // Short delay
  duration = pulseIn(echo, HIGH); // Measure echo pulse duration
  float distance = duration * 0.03405 / 2; // Calculate distance
  return distance;
}

void loop() {
  data = dhtsensor.getTempAndHumidity(); // Read temperature and humidity

  Serial.println("TEMP: " + String(data.temperature));
  Serial.println("Humid: " + String(data.humidity));

  distance = getDistance(); // Get distance reading
  Serial.println("Distance: " + String(distance));

  // LED control based on conditions
  if (data.temperature >= 50 || distance >= 50) {
    digitalWrite(ledPin, HIGH); // Turn LED on (solid)
    Serial.println("High temperature or object detected!");
  } else {
    digitalWrite(ledPin, LOW); // Turn LED off
     // Delay for blinking effect
  }
  delay(3000);
}