#include <WiFi.h>
#include <WiFiClient.h>
#include <PubSubClient.h>
 


 
 



#define RLED 23 
#define OLED 22  
#define YLED 21 
#define LGLED 19
#define DGLED 18  
#define LBLED  5  
#define DBLED 4  
#define LPLED 2  
#define DPLED 13  
#define POTPIN 12

// Define servo pins
#define alkalinePin 26  // Pin for alkaline servo (adjust as needed)
#define neutralPin 25   // Pin for neutral servo (adjust as needed)
#define acidicPin 27    // Pin for acidic servo (adjust as needed)

// Define servo positions
int servoMin = 1000;    // Minimum pulse width (microseconds)
int servoMax = 2000;    // Maximum pulse width (microseconds)
int servoCenter = (servoMin + servoMax) / 2; // Center pulse width (microseconds)


void setup() {
  pinMode(RLED, OUTPUT);
  pinMode(OLED, OUTPUT);
  pinMode(YLED, OUTPUT);
  pinMode(LGLED, OUTPUT);
  pinMode(DGLED, OUTPUT);
  pinMode(LBLED, OUTPUT);
  pinMode(DBLED, OUTPUT);
  pinMode(LPLED, OUTPUT);
  pinMode(DPLED, OUTPUT);
  
  pinMode(POTPIN, INPUT);

  pinMode(alkalinePin, OUTPUT);
  pinMode(neutralPin, OUTPUT);
  pinMode(acidicPin, OUTPUT);

  Serial.begin(9600);  // Initialize serial communication

}

void loop() {
  float pHValue = map(analogRead(POTPIN), 0, 4095, 0.0, 14.0);  // Map analog reading to pH range 0-14
  
  Serial.print("pH Value: ");
  Serial.println(pHValue, 2); // Print pH value with 2 decimal places
  
  digitalWrite(RLED, pHValue == 0);
  digitalWrite(OLED, pHValue >= 1.0 && pHValue <= 2.0);
  digitalWrite(YLED, pHValue >= 3.0 && pHValue <= 4.0);
  digitalWrite(LGLED, pHValue >= 5.0 && pHValue <= 6.0);
  digitalWrite(DGLED, pHValue == 7.0);
  digitalWrite(LBLED, pHValue >= 8.0 && pHValue <= 9.0);
  digitalWrite(DBLED, pHValue >= 10.0 && pHValue <= 11.0);
  digitalWrite(LPLED, pHValue >= 12.0 && pHValue <= 13.0);
  digitalWrite(DPLED, pHValue == 14.0);

  // Map pH value to servo positions
  int alkalinePosition = map(pHValue, 1.0, 3.0, servoMin, servoMax);
  int neutralPosition = map(pHValue, 4.0, 5.2, servoMin, servoMax);
  int acidicPosition = map(pHValue, 6.5, 14.0, servoMin, servoMax);

  // Control the servos using PWM signals
  if (pHValue >= 1.0 && pHValue <= 3.0) {
    generatePWM(alkalinePin, alkalinePosition);
  } else {
    generatePWM(alkalinePin, servoCenter);
  }

  if (pHValue >= 4.0 && pHValue <= 5.2) {
    generatePWM(neutralPin, neutralPosition);
  } else {
    generatePWM(neutralPin, servoCenter);
  }

  if (pHValue >= 6.5 && pHValue <= 14.0) {
    generatePWM(acidicPin, acidicPosition);
  } else {
    generatePWM(acidicPin, servoCenter);
  }
  
  delay(1000);
}
void generatePWM(int pin, int pulseWidth) {
  digitalWrite(pin, HIGH);
  delayMicroseconds(pulseWidth);
  digitalWrite(pin, LOW);
  delayMicroseconds(20000 - pulseWidth); // 20ms period
}