[ICT DIY] 아두이노로 화분 습도 센서 제어하기

soil_humidity_sensor.ino

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

#define RED 3
#define GREEN 4

LiquidCrystal_I2C lcd(0x27, 16, 2);

void setup()
{
  lcd.init();
  lcd.backlight();

  pinMode(RED, OUTPUT);
  pinMode(GREEN, OUTPUT);
}

void loop()
{
  int humidity = map(analogRead(A0), 0, 1023, 100, 0);

  lcd.clear();

  lcd.setCursor(0, 0);
  lcd.print("Humidity : ");
  lcd.print(humidity);
  lcd.print("%");

  lcd.setCursor(0, 1);
  if (humidity > 35) {
    digitalWrite(GREEN, HIGH);
    digitalWrite(RED, LOW);

    lcd.print("I'm OK!");
  }
  else {
    digitalWrite(GREEN, LOW);
    digitalWrite(RED, HIGH);

    lcd.print("Give Me Water!");
  }
  delay(1000);
}

구매해보고 안되서 이래저래 하다보니까 0x27 -> 0x3F 로 하시면 됩니다~

@w56thrhtdhs 네!