#include <WiFi.h>
#include <DHTesp.h>
#include <ThingSpeak.h>
WiFiClient client;
long myChannelNumber =  2709473;
const char * myWriteAPIKey = "ZA9QEXM06E3OOKVI";
int statusCode;
char ssid[]="Wokwi-GUEST";
char pass[]="";
DHTesp hari;
TempAndHumidity data;
int trigger=16;
int echo=4;
int green=5;
int orange=17;
int red=2;
void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  ThingSpeak.begin(client);
 
  pinMode(trigger, OUTPUT);
  pinMode(echo, INPUT);
  pinMode(green, OUTPUT);
  pinMode(orange, OUTPUT);
  pinMode(red, OUTPUT);
  hari.setup(18,DHTesp::DHT22);
}
int finding_distance(){
  digitalWrite(trigger,HIGH);
  delay(100);
  digitalWrite(trigger,LOW);
  float a=pulseIn(echo,HIGH);
  return(a*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.");
    }
  data=hari.getTempAndHumidity();
  int distance=finding_distance();
  Serial.println(distance);
  Serial.println("Humi:" + String(data.humidity));
  Serial.println("Temp:" + String(data.temperature));
  if(distance>300 && data.temperature<30 && data.humidity>70)
  {
  digitalWrite(green, HIGH);
  digitalWrite(orange, LOW);
  digitalWrite(red, LOW);
  Serial.println("You are safe");
  }
  else if(distance>200 && distance<300 && data.temperature>30 && data.temperature<70 && data.humidity>30 && data.humidity<70)
  {
  digitalWrite(orange, HIGH);
  digitalWrite(green, LOW);
  digitalWrite(red, LOW);
  Serial.println("You are unsafe");
  }
  else if(distance<200 && data.temperature>70 && data.humidity<30)
  {
    digitalWrite(red, HIGH);
    digitalWrite(green, LOW);
    digitalWrite(orange, LOW);
    Serial.println("You are in danger");
  }
  else
  {
    digitalWrite(red, LOW);
    digitalWrite(green, LOW);
    digitalWrite(orange, LOW);
  }
  ThingSpeak.setField(1, distance);
   ThingSpeak.setField(2, data.humidity);
    ThingSpeak.setField(3, data.temperature);

  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));
}

  // put your main code here, to run repeatedly:
  delay(10); // this speeds up the simulation
}