int trigger=5;
int echo=17;
float distance;
#include <WiFi.h>
#include<ThingSpeak.h>
#include <DHTesp.h>
char ssid[] = "Wokwi-GUEST";
char pass[] = "";


WiFiClient client;
long myChannelNumber =2614294;
const char * myWriteAPIKey = "ZLWFXSLI0YEL0EZ5";
int statusCode;  

DHTesp Ravi;
TempAndHumidity data;

void setup() {
  WiFi.mode(WIFI_STA);
  pinMode(trigger, OUTPUT);
  pinMode(echo,INPUT);
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(17, INPUT);
  pinMode(26, OUTPUT);
  pinMode(25, OUTPUT);
  pinMode(27, OUTPUT);
  pinMode(16, OUTPUT);
  Serial.begin(115200);
 Ravi.setup(18, DHTesp::DHT22);
 ThingSpeak.begin(client);
}
int ultraperformance(){
digitalWrite(trigger, LOW);
delay(10);
digitalWrite(trigger, HIGH);
delay(100);
digitalWrite(trigger,LOW);
distance=pulseIn(echo, HIGH);
return(distance*0.034/2);
}

void loop() {
  if(WiFi.status() != WL_CONNECTED)
  {
  Serial.print("Attempting to connect");
    while(WiFi.status() != WL_CONNECTED)
    {
    WiFi.begin(ssid, pass); 
    Serial.print(".");
    delay(5000);
    }
  Serial.println("\nConnected.");
  } 


 int original_distance= ultraperformance();
 Serial.println("original_distance : "+String(original_distance));
 delay(100);
ThingSpeak.setField(1,data.temperature);
ThingSpeak.setField(2,data.humidity);
ThingSpeak.setField(3,original_distance);
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));
}

  data = Ravi.getTempAndHumidity();

  Serial.println("Humi : " + String(data.humidity));
  Serial.println("Temp : " + String(data.temperature));
  Serial.println("-----------------");
  delay(1000);
if(data.temperature>30 && data.humidity>70 && original_distance>300)
{
  digitalWrite(4, HIGH);
  Serial.println("You are in Safe");
  digitalWrite(25,LOW);
  digitalWrite(32, LOW);
  noTone(16);
  }
  
  else if(data.temperature>30 && data.temperature<70 && data.humidity>30 && data.humidity<70 && original_distance>200 && original_distance<=300)
  {
    digitalWrite(4, LOW);
    digitalWrite(25, HIGH);
    Serial.println("You are not in Safe");
    digitalWrite(26,LOW);
    digitalWrite(27, LOW);
    noTone(16);
    
  
   }
   else if(data.temperature<30 && data.humidity<30 && original_distance<200)
   {
    
    digitalWrite(4, LOW);
    digitalWrite(27, HIGH);
    Serial.println("You are in danger");
    digitalWrite(26,LOW);
    digitalWrite(25, LOW);
    tone(16,3000);
    noTone(16);
   }
   else{
    digitalWrite(4, LOW);
    digitalWrite(27, LOW);
    digitalWrite(26,LOW);
    digitalWrite(25, LOW);
   }
}