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

#define pump A0


LiquidCrystal_I2C lcd(0x27, 16, 4);
DHT dht(8, DHT22);

byte termometru[] = //icon for termometer
{
    B00100,
    B01010,
    B01010,
    B01010,
    B01110,
    B11111,
    B11111,
    B01110
};

byte picatura[] = //icon for water droplet
{
    B00100,
    B00100,
    B01010,
    B01010,
    B10001,
    B10001,
    B10001,
    B01110,
};

void setup() {

  Serial.begin(9600);
  pinMode(pump, OUTPUT);
  digitalWrite(pump, LOW);

  dht.begin();
  lcd.begin(16, 2);

  lcd.createChar(0, picatura);
  lcd.setCursor(0,0);
  lcd.write(0);
  lcd.print("   "); 
  lcd.print("% RH: -PUMP-");

  lcd.createChar(1, termometru);
  lcd.setCursor(0,1);
  lcd.write(1);
  lcd.print("     ");
  lcd.print((char)223);
  lcd.print("C:  OFF");

}
float temp, humidity, soil;

void loop() {

  checkSensor();
  humidity = dht.readHumidity(true);
  temp = dht.readTemperature();

  lcd.setCursor(2, 0);
  lcd.print(humidity, 0);
  lcd.setCursor(2, 1);
  lcd.print(temp, 1);

  // ปั้มน้ำ
  if(humidity < 55) {
    digitalWrite(pump, HIGH);
    lcd.setCursor(11, 1);
    lcd.print("ON ");
  }
  else if(humidity >= 70) {
    digitalWrite(pump, LOW);
    lcd.setCursor(11, 1);
    lcd.print("OFF");
  }
}
void checkSensor() {
  if ( isnan(humidity) || isnan(temp) ) {
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Failed to read from");
    lcd.setCursor(2, 1);
    lcd.print("DHT Sensor!");
    return;
  }
}