tum yil icin arduino mufredati 23

tum_yil_icin_arduino_mufredati_23.ino

#include <Wire.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x3F,16,2);

#define sensor_pin A0
#define sensor_pin 8
int buzzer=9;
#define preheat_time 5000

void setup() {
 lcd.begin();
 pinMode(2,OUTPUT);
 pinMode(9,OUTPUT);
}

void loop() {
     lcd.setCursor(0,0);
    lcd.print("Hava Kontrol");
    lcd.setCursor(0,1);
    lcd.print("Ediliyor");
    delay(5000);
    int sensorValue = analogRead(sensor_pin); 
    digitalWrite(9,LOW);
    digitalWrite(2,LOW);
if (sensorValue >= 400)

{    digitalWrite(2,HIGH);
     digitalWrite(9,HIGH);
    lcd.clear();
    lcd.setCursor(0,0);
    lcd.print("Zararlı gaz");
    lcd.setCursor(0,1);
    lcd.print("tespit edildi");
    delay(3000);
    lcd.clear();
   
}   

else
{   digitalWrite(2,LOW);
    lcd.clear();
    lcd.setCursor(0,0);
    lcd.print("Hava Temiz");
    delay(4000);
    lcd.clear();
    
} 

}