#include <DHT.h>
#include <SPI.h>  // SPI is kept in case you want to add a LoRa module later

#define DHTPIN 4          // DHT22 data pin
#define DHTTYPE DHT22     // Define the DHT type
DHT dht(DHTPIN, DHTTYPE);

#define GAS_SENSOR_PIN 34  // MQ gas sensor pin
#define PIR_SENSOR_PIN 27  // PIR motion sensor pin

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

    // Initialize DHT sensor
    dht.begin();

    // Initialize GPIOs
    pinMode(GAS_SENSOR_PIN, INPUT);
    pinMode(PIR_SENSOR_PIN, INPUT);

    Serial.println("Sensors Initialized...");
}

void loop() {
    // Read temperature and humidity from DHT22
    float temperature = dht.readTemperature();
    float humidity = dht.readHumidity();

    // Read gas sensor value
    int gasValue = analogRead(GAS_SENSOR_PIN);

    // Read PIR motion sensor state
    int pirState = digitalRead(PIR_SENSOR_PIN);
    String motionStatus = (pirState == HIGH) ? "Motion Detected!" : "No Motion";

    // Display the sensor readings
    Serial.println("----- Sensor Readings -----");
    Serial.printf("Temperature: %.2f °C\n", temperature);
    Serial.printf("Humidity: %.2f %%\n", humidity);
    Serial.printf("Gas Sensor Value: %d\n", gasValue);
    Serial.println(motionStatus);
    Serial.println("---------------------------");

    // Simulate LoRa transmission (Print data as if sending via LoRa)
    Serial.println("Simulating LoRa Transmission...");
    Serial.print("Temp: "); Serial.print(temperature); Serial.print(" °C | ");
    Serial.print("Humidity: "); Serial.print(humidity); Serial.print(" % | ");
    Serial.print("Gas: "); Serial.print(gasValue); Serial.print(" | ");
    Serial.print(motionStatus);
    Serial.println("\nData Sent (Simulation)!\n");

    delay(5000); // Wait 5 seconds before next transmission
}