// Define the analog pins for the sensors
#define MQ135_PIN 34     // Analog pin for MQ135 sensor (potentiometer simulating the gas sensor)
#define KY038_PIN 35     // Analog pin for KY-038 sensor (potentiometer simulating the sound sensor)

void setup() {
  // Start serial communication for debugging
  Serial.begin(115200);
  
  // Configure the analog pins (ESP32 pins are configured by default as input)
  pinMode(MQ135_PIN, INPUT);
  pinMode(KY038_PIN, INPUT);
  
  Serial.println("ESP32 with MQ135 and KY-038 (Simulated using Potentiometers)");
}

void loop() {
  // Read analog values from both sensors (simulated potentiometers)
  int gasValue = analogRead(MQ135_PIN);  // Read raw gas sensor value (ADC from potentiometer)
  int soundValue = analogRead(KY038_PIN);  // Read raw sound sensor value (ADC from potentiometer)

  // Map the gas sensor value to a gas concentration (this requires calibration)
  float gasConcentration = mapGasReading(gasValue);
  
  // Convert sound sensor value to decibels (you may need to calibrate)
  float soundLevel = mapSoundReading(soundValue);
  
  // Print the sensor values for debugging
  Serial.print("Gas Concentration (PPM): ");
  Serial.println(gasConcentration);
  Serial.print("Sound Level (dB): ");
  Serial.println(soundLevel);
  
  // Add a delay for stability (adjust as necessary)
  delay(1000);  // 1 second delay
}

// Function to convert gas sensor value to concentration (this is a placeholder)
float mapGasReading(int gasValue) {
  // Example: Simple linear conversion (you'll need to replace with actual formula or calibration)
  float concentration = gasValue * (500.0 / 4095.0);  // Example for a linear scale
  return concentration;
}

// Function to convert sound sensor value to decibels (adjust calibration as needed)
float mapSoundReading(int soundValue) {
  // Example: Linear mapping (calibrate for accurate conversion)
  float soundLevel = soundValue * (100.0 / 4095.0);  // Convert to decibels (dB)
  return soundLevel;
}