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

#define LIGHT_SENSOR A0
#define HUM_SENSOR A1
#define BUZZER 3
#define SERVO_PIN 11

#define I2C_ADDR 0x27
#define I2C_COLS 16
#define I2C_ROWS 2

#define R 7
#define G 6
#define B 5

LiquidCrystal_I2C lcd(I2C_ADDR, I2C_COLS, I2C_ROWS);

Servo myServo;

void setup() {
  myServo.attach(SERVO_PIN);

  lcd.init();
  lcd.backlight();

  pinMode(R, OUTPUT);
  pinMode(G, OUTPUT);
  pinMode(B, OUTPUT);

}

void loop() {
  int lightLevel = map(analogRead(LIGHT_SENSOR), 0, 1023, 100, 0); // 0 - 1023
  int humLevel = map(analogRead(HUM_SENSOR), 0, 1023, 0, 100);

  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("light:" + String(lightLevel));
  lcd.setCursor(9,0);
  lcd.print("hum:" + String(humLevel));

  lcd.setCursor(0,1);
  if(humLevel < 30) {
    digitalWrite(G, LOW);
    digitalWrite(R, HIGH);
    myServo.write(0);
    lcd.print("Ground is dry");
    tone(BUZZER, 500, 500);
  }else {
    digitalWrite(R, LOW);
    digitalWrite(G, HIGH);
    myServo.write(90);
    lcd.write("Plants good");
  }

  delay(1000);

}