#include <DHTesp.h>
#define DHTPIN 32
DHTesp dht;

#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 20, 4);

int pir =33;
int IP;

int potentiometer =35;
float val1 = 0 ;
float val2 =0;

#define TRIG_PIN 17
#define ECHO_PIN 16

void setup() {
  dht.setup(DHTPIN, DHTesp::DHT22);
  lcd.init();
  lcd.clear();
  lcd.backlight();
  lcd.setCursor(0, 0);
  lcd.print(" HELLO Teacher");
  delay(1000);
  lcd.clear();
  Serial.begin(115200);
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
  pinMode(potentiometer, INPUT);
  pinMode(pir,INPUT);

}
void loop() {
  float data, cm;
  
  // Trigger the ultrasonic sensor
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);
  
  data = pulseIn(ECHO_PIN, HIGH);
  cm = data * 0.034 / 2; // คำนวณระยะทาง
  
  lcd.setCursor(0, 1);
  lcd.print("D: = ");
  lcd.print(cm);
  lcd.print(" CM     ");
  delay(1000);
  float h = dht.getHumidity();
  float t = dht.getTemperature();
    lcd.setCursor(0, 0);
    lcd.print("T:=");
    lcd.print(t);
    lcd.setCursor(8, 0);
    lcd.print(" H:=");
    lcd.print(h);


val1 = analogRead(potentiometer);
val2 = map(val1,0,4095,0,5);
  lcd.setCursor(0,2);
  lcd.print("volt=");
  lcd.print(val2);
  lcd.print("V");
  delay(1000);


IP=digitalRead(pir);
delay(100);
  if(IP==1){
    lcd.setCursor(0,3);
    lcd.print("Detected!   ");
    delay(1000);  
  }
  else{
    lcd.setCursor(0,3);
    lcd.print("Not found!");
    delay(1000);  
  }
}