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

#define LIGHT_SENSOR_PIN 34   // Define light sensor pin (analog)
#define LED_PIN 26            // LED light control pin

int lightIntensity = 0;        // Light intensity value
int threshold = 500;           // Initial threshold for testing, to be calibrated

void setup() {
  Serial.begin(9600);
  
  // Initialize sensors
  pinMode(LIGHT_SENSOR_PIN, INPUT);
  
  // Initialize output devices
  pinMode(LED_PIN, OUTPUT);

  // Turn off all output devices initially
  digitalWrite(LED_PIN, LOW);
  
  Serial.println("Calibrating... Check the Light Intensity Values on Serial Monitor.");
  Serial.println("Adjust the threshold in the code accordingly.");
}

void loop() {
  // Read light intensity
  lightIntensity = analogRead(LIGHT_SENSOR_PIN);

  // Print sensor readings
  Serial.print("Light Intensity: "); Serial.println(lightIntensity);

  // Check and display the current threshold
  Serial.print("Current Threshold: "); Serial.println(threshold);
  
  // Control logic for output devices
  controlLED();
  
  delay(2000); // Adjust delay as per required sampling rate
}

void controlLED() {
  if (lightIntensity < threshold) { // Compare with the threshold
    digitalWrite(LED_PIN, HIGH);    // Turn on LED if light intensity is low
    Serial.println("LED ON");
  } else {
    digitalWrite(LED_PIN, LOW);
    Serial.println("LED OFF");
  }
}