#include <DHTesp.h>

// ---------- PIN CONFIGURATION ----------

#define TRIG_PIN 5
#define ECHO_PIN 18

#define GAS_PIN 34

#define DHT_PIN 4

#define PIR_PIN 27

#define LDR_PIN 35

// ---------------------------------------

DHTesp dhtSensor;

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

  // Ultrasonic
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);

  // Gas sensor
  pinMode(GAS_PIN, INPUT);

  // DHT22
  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);

  // PIR
  pinMode(PIR_PIN, INPUT);

  // LDR
  pinMode(LDR_PIN, INPUT);

  Serial.println("Sensor System Started");
}

void loop() {

  // ========== ULTRASONIC ==========

  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 * 0.0343 / 2;

  Serial.print("Distance: ");
  Serial.print(distance);
  Serial.println(" cm");


  // ========== GAS SENSOR ==========

  int gasValue = analogRead(GAS_PIN);

  Serial.print("Gas Value: ");
  Serial.println(gasValue);


  // ========== DHT22 ==========

  TempAndHumidity data = dhtSensor.getTempAndHumidity();

  Serial.print("Temperature: ");
  Serial.print(data.temperature);
  Serial.println(" °C");

  Serial.print("Humidity: ");
  Serial.print(data.humidity);
  Serial.println(" %");


  // ========== PIR ==========

  int pirValue = digitalRead(PIR_PIN);

  if (pirValue == HIGH) {
    Serial.println("Motion: DETECTED");
  } else {
    Serial.println("Motion: NOT DETECTED");
  }


  // ========== LDR ==========

  int ldrValue = analogRead(LDR_PIN);

  Serial.print("LDR Value: ");
  Serial.println(ldrValue);

  Serial.println("-------------------------");

  delay(1000);
}