int trigger = 12;
int echo = 14;
#include <DHTesp.h>
#include <WiFi.h>
char ssid[] = "Wokwi-GUEST";
char pass[] = "";
#include <ThingSpeak.h>
WiFiClient client;
long myChannelNumber =  2627271;
const char * myWriteAPIKey = "ITAHFR0OT2XJ7EE2";
int statusCode;
DHTesp humidity;
TempAndHumidity data;



void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(19, OUTPUT);//red
  pinMode(18, OUTPUT);//yellow
  pinMode(5, OUTPUT);//green
  pinMode(trigger, OUTPUT);
  pinMode(echo, INPUT);
  humidity.setup(15, DHTesp::DHT22);
  WiFi.mode(WIFI_STA);
  ThingSpeak.begin(client);
}

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 distance = ultrasonic();
    data = humidity.getTempAndHumidity();
    Serial.println(distance);
    delay(1000);
    Serial.println("Humi : " + String(data.humidity));
    Serial.println("Temp : " + String(data.temperature));
    Serial.println("-----------------");
    delay(1000);
    if (data.temperature >= 50 && data.humidity <= 20 && distance >= 300)
    {
      digitalWrite(19, HIGH);
      digitalWrite(18, LOW);
      digitalWrite(5, LOW);
      Serial.println("your safe");
    }
    else if (data.temperature >= 20 && data.temperature <= 50 && data.humidity >= 20 && data.humidity <= 50 && distance >= 200 && distance <= 300)
    {
      digitalWrite(18, HIGH);
      digitalWrite(19, LOW);
      digitalWrite(5, LOW);
      Serial.println("your in unsafe");
    }
    else if (data.temperature <= 20 && data.humidity > 50 && distance <= 200)
    {
      digitalWrite(5, HIGH);
      digitalWrite(18, LOW);
      digitalWrite(19, LOW);
      Serial.println("your danger");
    }
    else {
      digitalWrite(5, LOW);
      digitalWrite(18, LOW);
      digitalWrite(19, LOW);
    }
  
  ThingSpeak.setField(1, data.temperature);
   ThingSpeak.setField(2, data.humidity);
  ThingSpeak.setField(5, 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));
}
  }

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;
}