#include <DHT.h>
#define NODE 2

#if NODE == 1
#define MQ2_PIN 34

void setup() {
  Serial.begin(115200);
  delay(1000);
  Serial2.begin(9600, SERIAL_8N1, 16, 17);
  Serial.println("Gas Node ready");
}

void loop() {
  int gasRaw = analogRead(MQ2_PIN);
  Serial.print("Gas (raw): ");
  Serial.println(gasRaw);
  Serial2.println(gasRaw);
  delay(2000);
}

#elif NODE == 2
#define DHT_PIN 15
#define DHT_TYPE DHT22
DHT dht(DHT_PIN, DHT_TYPE);

void setup() {
  Serial.begin(115200);
  delay(1000);
  Serial2.begin(9600, SERIAL_8N1, 16, 17);
  dht.begin();
  Serial.println("Climate Node ready");
}

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

  if (isnan(temperature) || isnan(humidity)) {
    Serial.println("DHT read error!");
  } else {
    Serial.print("Temp: "); Serial.print(temperature); Serial.println(" C");
    Serial.print("Humidity: "); Serial.print(humidity); Serial.println(" %");
  }

  if (Serial2.available()) {
    String gasData = Serial2.readStringUntil('\n');
    Serial.print("Gas from ESP32 #1: ");
    Serial.println(gasData);
  }
  delay(2000);
}
#endif