// Define sensor pins
const int tempSensorPin = 34;  // Analog temperature sensor pin (LM35 or similar)
const int phSensorPin = 35;    // Analog pH sensor pin
const int gasSensorPin = 32;   // Analog gas sensor pin

void setup() {
  // Initialize serial communication for debugging
  Serial.begin(115200);

  // Initialize ADC pins
  pinMode(tempSensorPin, INPUT);
  pinMode(phSensorPin, INPUT);
  pinMode(gasSensorPin, INPUT);
}

void loop() {
  // Read raw analog values from the sensors
  int tempValue = analogRead(tempSensorPin);
  int phValue = analogRead(phSensorPin);
  int gasValue = analogRead(gasSensorPin);

  // Convert the analog readings to meaningful units
  // Assuming 10mV per degree Celsius for LM35 temperature sensor
  float temperature = (tempValue * 3.3 / 4095.0) * 100; // Convert ADC value to temperature (assuming 10mV/°C)

  // You may need to calibrate the pH and gas sensor for your specific sensors
  float ph = (phValue * 3.3 / 4095.0) * 14; // Map the pH value to a range of 0-14
  float gasConcentration = (gasValue * 3.3 / 4095.0) * 100; // Example mapping for gas concentration (in percentage or ppm)

  // Print sensor values to serial monitor
  Serial.print("Temperature: ");
  Serial.print(temperature);
  Serial.println(" °C");

  Serial.print("pH Value: ");
  Serial.print(ph);
  Serial.println();

  Serial.print("Gas Concentration: ");
  Serial.print(gasConcentration);
  Serial.println(" ppm"); // Modify based on sensor documentation

  // Wait before taking another reading
  delay(1000);
}