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

#define SDA_PIN 21
#define SCL_PIN 22

LiquidCrystal_I2C lcd(0x27, 16, 2);

void setup() {
  Serial.begin(115200);

  Wire.begin(SDA_PIN, SCL_PIN);

  Serial.println("LCD TEST");

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

  lcd.setCursor(0, 0);
  lcd.print("AQI MONITOR");

  lcd.setCursor(0, 1);
  lcd.print("LCD WORKING!");
}

void loop() {
}