#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <Servo.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);
Servo myservo;

const int potPin = A0;
const int relayPin = 8;
const int servoPin = 9;

int potValue = 0;
int pressure = 0;

void setup() {
lcd.begin(16, 2);
lcd.backlight();
lcd.print("Water Pressure");

pinMode(relayPin, OUTPUT);
myservo.attach(servoPin);

Serial.begin(9600);
}

void loop() {
potValue = analogRead(potPin);
  
  pressure = map(potValue, 0, 1023, 0, 100);

  lcd.setCursor(0, 1);
  lcd.print("Pressure: ");
  lcd.print(pressure);
  lcd.print(" % ");

  int servoPos = map(pressure, 0, 100, 0, 180);
  myservo.write(servoPos);

  if (pressure > 50) {
  digitalWrite(relayPin, HIGH);
  } else {
  digitalWrite(relayPin, LOW);
  }

  Serial.print("Pot Value: ");
  Serial.print(potValue);
  Serial.print(" | Pressure: ");
  Serial.println(pressure);

  delay(500);
  }