#include <Wire.h>         // For I2C communication (pH sensor and light sensor if needed)
#include <Adafruit_Sensor.h>

#define PH_SENSOR_PIN 25      // Define pH sensor pin (analog)

float phValue = 0.0;           // pH value to be read from sensor

void setup() {
  Serial.begin(9600);
  
  // Initialize sensors
  pinMode(PH_SENSOR_PIN, INPUT);
}

void loop() {
  // Read pH level (analog)
  int phValueRaw = analogRead(PH_SENSOR_PIN);
  phValue = (phValueRaw * (14.0 / 4095.0)); // Scale raw value to pH range (0-14)

  // Classify the pH value
  String phClassification = classifyPH(phValue);

  // Print sensor readings
  Serial.print("pH: "); Serial.println(phValue); Serial.print(" - ");
  Serial.println(phClassification); // Print the classification
  
  delay(2000); // Adjust delay as per required sampling rate
}
String classifyPH(float ph) {
  if (ph < 7.0) {
    return "Acidic";
  } else if (ph == 7.0) {
    return "Neutral";
  } else {
    return "Alkaline";
  }
}