#include <LiquidCrystal.h>
const int rs=13, en=12, d4=11, d5=10, d6=9, d7=8;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);
long duration;
int distance;
const int trigpin=6, echopin=5;
int button=4;
int x;
int y;

void setup() {
  // put your setup code here, to run once:
  lcd.begin(16,2);
  lcd.setCursor(4,0);
  lcd.print("Welcome");
  delay(1000);
  pinMode(trigpin, OUTPUT);
  pinMode(echopin, INPUT);
  Serial.begin(115200);
  pinMode(button, INPUT);
  lcd.clear();
}

void loop() {
  // put your main code here, to run repeatedly:
 
int a = digitalRead(button);
  if (a == HIGH) {
    lcd.clear();
    lcd.setCursor(0,0);
    lcd.print("UltrasonicSensor");
    digitalWrite(trigpin, LOW);
    delay(1000);
    digitalWrite(trigpin, HIGH);
    delay(1000);
    digitalWrite(trigpin, LOW);
    duration = pulseIn(echopin, HIGH);
    distance = duration * 0.034/2;
    Serial.print("distance ");
    lcd.setCursor(0,1);
    lcd.print(distance);

  }
  else{
    
     x = analogRead(A5);
    y = map(x, 0, 1023, 0, 255);
    lcd.setCursor(1,0);
    lcd.print("Potentiometer");
    delay(1000);
    lcd.setCursor(5,1);
    lcd.print(y);
  }
}