#include <DHTesp.h>

DHTesp dhtsensor;
TempAndHumidity data;

int trigger=12;
int echo=14;
void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(trigger,OUTPUT);
  pinMode(echo,INPUT);
  pinMode(21, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(2, OUTPUT);
  dhtsensor.setup(18, DHTesp::DHT22);
}

void loop() {
data = dhtsensor.getTempAndHumidity();
int actual_distance=ultrasonic();
Serial.println(actual_distance);
  Serial.println("Humi : " + String(data.Humidity));
  Serial.println("Temp : " + String(data.Temperature));
  Serial.println("-----------------");
  delay(1000);
if(actual_distance>=300 && data.Temperature>=50 && data.Humidity<=20){   
digitalWrite(21, HIGH);
digitalWrite(4, LOW);
digitalWrite(2, LOW);
Serial.println("you are safe");
}
else if(actual_distance>=200 && actual_distance<=300 && data.Temperature>20 && data.Temperature<50 && data.Humidity>20 && data.Humidity<50){ 
digitalWrite(21, LOW);
digitalWrite(4, HIGH);
digitalWrite(2, LOW);
Serial.println("you are unsafe");
}
else if(actual_distance<=200 && data.Temperature<20 && data.Humidity>50){
digitalWrite(4, LOW);
digitalWrite(2, HIGH);
digitalWrite(21, LOW);
Serial.println("you are danger");
}
}
int ultrasonic () {
  digitalWrite(trigger, LOW);
  delay(10);
  digitalWrite(trigger,HIGH);
  delay(100);
  digitalWrite(trigger, LOW);
  int distance=pulseIn(echo,HIGH);
 // return(distance);
  return(distance*0.034/2)+1;

}