/**
   ESP32 + DHT22 + MQ-2 Example

   DHT22 library: DHTesp (used here)
   MQ-2: Analog read on ADC pin
*/

#include "DHTesp.h"

const int DHT_PIN = 15;       // DHT22 connected to GPIO 15
const int MQ2_PIN = 34;       // MQ-2 analog output to GPIO 34 (ADC1)

DHTesp dhtSensor;

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

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

  // Initialize MQ2 analog pin
  analogReadResolution(10); // Optional: sets resolution (0-1023)
  delay(1000);
}

void loop() {
  // Read DHT22
  TempAndHumidity data = dhtSensor.getTempAndHumidity();
  Serial.println("Temp: " + String(data.temperature, 2) + "°C");
  Serial.println("Humidity: " + String(data.humidity, 1) + "%");

  // Read MQ-2 Gas Sensor
  int gasValue = analogRead(MQ2_PIN);
  Serial.println("Gas (MQ-2): " + String(gasValue));
  
  Serial.println("---");
  delay(2000); // Wait before next reading
}