#include <DHTesp.h>
DHTesp dht;
TempAndHumidity th;
long myChannelNumber =  2629449;
const char * myWriteAPIKey = "QNNS8XJKLYS2XXEY";
const int trg=14,echo=13,grn=25,org=21,red=19,buzzer=2;
float dis=0;
void setup() {
  Serial.begin(115200);
  pinMode(trg, OUTPUT);
  pinMode(echo,INPUT);
  pinMode(grn, OUTPUT);
  pinMode(org,OUTPUT);
  pinMode(red, OUTPUT);
  pinMode(buzzer, OUTPUT);
  dht.setup(18,DHTesp::DHT22);
}
int ultra(){
  digitalWrite(trg,HIGH);
  delay(1000);
  digitalWrite(trg,LOW);
  float eh=pulseIn(echo,HIGH);
  dis=eh*0.034/2;
  return dis;
}
void loop() {
  th=dht.getTempAndHumidity();
  int sensor=ultra();
  if(th.temperature <=30 && th.humidity >=70 && dis>=300){
    digitalWrite(grn, HIGH);
    digitalWrite(org, LOW);
    digitalWrite(red, LOW);
    Serial.println("You are safe!!");
    noTone(buzzer);
  }
  else if((th.temperature >30 && th.temperature<70) && (th.humidity >30 && th.humidity<70) && (dis>200 && dis<300))
  {
    digitalWrite(org, HIGH);
    digitalWrite(grn, LOW);
    digitalWrite(red, LOW);
    Serial.println("You are unsafe!!");
    noTone(buzzer);
  }
  else if(th.temperature >=70 && th.humidity <=30 && dis<=200){
    digitalWrite(red, HIGH);
    digitalWrite(org, LOW);
    digitalWrite(grn, LOW);
    Serial.println("You are danger!!!!!!");
    tone(buzzer, 10000);
  }
  else{
    digitalWrite(red, LOW);
    digitalWrite(org, LOW);
    digitalWrite(grn, LOW);
    Serial.println("Unstable values");
    tone(buzzer, 10000);
  }
  delay(10);
  ThingSpeak.setField(1,data.temperature);
  ThingSpeak.setField(2,data.humidity);
  ThingSpeak.setField(3,data2);

  statusCode = ThingSpeak.writeFields(myChannelNumber,myWriteAPIKey);

  if(statusCode == 200) { //successful writing code
  Serial.println("Channel update successful.");
  }
  else {
  Serial.println("Problem Writing data. HTTP error code :" +
  String(statusCode));
  }
  delay(1000); // this speeds up the simulation

  Serial.println("Temerature : "+String(data.temperature));
  Serial.println("humidity : "+String(data.humidity));
  Serial.println("Distance : "+String(data2));

}


int distance()
{
  digitalWrite(trig, HIGH);
  delay(100);
  digitalWrite(trig, LOW);
  float a = pulseIn(echo,HIGH);
  return(a*0.034/2);
}