#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#define trig 7
#define led 5
#define echo 6
#define buzzer 8
float uzaklik;
float sure;
float litre;
float referance =1.845;
int minx = -1;
int maxx = 3;
LiquidCrystal_I2C lcd(0x27,16,2);
void setup() {
lcd.init();
lcd.backlight();
lcd.setCursor(0,0);
pinMode (trig, OUTPUT);
pinMode (echo, INPUT);
pinMode (buzzer, OUTPUT);
pinMode (led, OUTPUT);
}
void loop() {
digitalWrite(trig, LOW);
delayMicroseconds(5);
digitalWrite(trig, HIGH);
delayMicroseconds (10);
digitalWrite(trig, LOW);
sure = pulseIn(echo, HIGH);
uzaklik= sure/29.1/2;
litre= uzaklik1111/1000;
delay(500);
litre= referance- litre;
if(litre<= maxx && litre>= minx);
{
lcd.clear();
lcd.setCursor(0,0);
lcd.print("DEPO SU SEVIYESI");
lcd.setCursor(5,1);
lcd.print(litre);
lcd.setCursor(10,1);
lcd.print("Litre");
delay(1000);
}
if(litre>=1.40);
{
lcd.clear();
lcd.setCursor(3,0);
lcd.print("DIKKAT");
lcd. setCursor(2,1);
lcd.print("DEPO DOLU");
digitalWrite(led, HIGH);
digitalWrite(buzzer, HIGH);
delay(500);
digitalWrite(led, LOW);
digitalWrite(buzzer, HIGH);
delay(500);
}
if(litre<=0);
{
lcd.clear();
lcd.setCursor(3,0);
lcd.print("DIKKAT");
lcd.setCursor(2,1);
lcd.print("DEPO BOS");
delay(700);
}
return loop();
{
lcd. clear();
}
}