#define echoPin 3 // Echo Pin
#define trigPin 2 // Trigger Pin
#define LEDPin 13 // Onboard LED

#include "DHT.h"
#define DHTPIN 11        //ขาdata ต่อ ขา11
#define DHTTYPE DHT22   //กำหนดค่าตามชนิดDHTที่ใช้งาน
DHT dht(DHTPIN, DHTTYPE);

int maximumRange = 200; // Maximum range needed
int minimumRange = 0; // Minimum range needed
long duration, distance; // Duration used to calculate distance

void setup() {
  Serial.begin (9600);
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  pinMode(LEDPin, OUTPUT); // Use LED indicator (if required)

}

void loop() {
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  duration = pulseIn(echoPin, HIGH);

  //Calculate the distance (in cm) based on the speed of sound.
  distance = duration / 58.2;

  Serial.println(distance);  //แสดงค่าระยะทาง

  if(distance >= 2 && distance <=20){
    Serial.println("A");
    float h = dht.readHumidity();
    float t = dht.readTemperature();
    float f = dht.readTemperature(true);

    delay(2000);
    Serial.print("Humidity: ");
    Serial.print(h);
    Serial.print(" %\t");
    Serial.print("Temperature: ");
    Serial.print(t);
    Serial.println(" c ");
    if (isnan(h) || isnan(t) || isnan(f)) {
        Serial.println("Failed to read from DHT sensor!");
        return;
    }
    OCR1A = 12499;
    Serial.println("DHT.humidity = OK");
    PORTB = 0xFF; // set PORTB = 1111 1111
  }
  else if(distance <= 401 && distance >=350){
     Serial.println("B");
  }
  else{
    Serial.println("Error");
  }
  delay(5000);

 
}