#include <WiFi.h>
#include <DHTesp.h>
#include <ThingSpeak.h>
WiFiClient client;
 long myChannelNumber = 2614431;
const char * myWriteAPIKey = "0H8720BES4HHEBIF";
char ssid[] = "Wokwi-GUEST";
char pass[] = "";
int statusCode;
int trig =12;
int echo =25;
float orange =27;
float red =26;
float distance;
DHTesp bhuvanesh;
TempAndHumidity data;

void setup() {
  ThingSpeak.begin(client);
 Serial.begin(115200);
 bhuvanesh.setup(18, DHTesp:: DHT22);
 // put your setup code here, to run once:
 WiFi.mode(WIFI_STA);
 pinMode(trig, OUTPUT);
 pinMode(echo, INPUT);
 pinMode (orange, OUTPUT);
 pinMode(red,OUTPUT);
 tone(22, OUTPUT);
 pinMode(21, OUTPUT);
}
int ultraperformance(){
 digitalWrite(trig, LOW);
 delay(100);
 digitalWrite(trig, HIGH);
 delay(100);
 digitalWrite(trig, LOW);
 distance=pulseIn(echo,HIGH);
 return(distance*0.034/2)+1;
 }


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 = bhuvanesh.getTempAndHumidity();
  Serial.println("Humi : " + String(data.humidity));
  Serial.println("Temp : " + String(data.temperature));
  Serial.println("-----------------");
  delay(1000);

 float actual_distance=ultraperformance();
 Serial.println(actual_distance);
 if(WiFi.status() == WL_CONNECTED){
     if (actual_distance>300 && data.temperature<30 && data.humidity>70) {
     digitalWrite(21, HIGH);
     digitalWrite(orange, LOW);
     digitalWrite(red, LOW);
     Serial.println("you are safe");
     tone(22,LOW);
   }

 
     else if(actual_distance>=200 && actual_distance <300 && data.temperature>= 30 && data.temperature <= 70 && data.humidity <= 70 && data.humidity >= 30){

     digitalWrite(orange ,HIGH);
     digitalWrite(21, LOW);
     digitalWrite(red, LOW);
     Serial.println("you are unsafe");
     tone(22,LOW);
   }

     else if(actual_distance>=0 && actual_distance<200 && data.temperature>70 && data.humidity<30){
     digitalWrite(red ,HIGH);
     digitalWrite(orange , LOW);
     digitalWrite(21, LOW);
     tone(22,8000);
     Serial.println("you are danger");
   }

     else{
     digitalWrite(21, LOW);
     digitalWrite(orange, LOW);
     digitalWrite(red, LOW);
     tone (22,8000);
   }
 }
 delay(2000);
 ThingSpeak.setField(1,data.temperature);
ThingSpeak.setField(2,data.humidity);
 ThingSpeak.setField(3,actual_distance);

 statusCode = ThingSpeak.writeFields(myChannelNumber,myWriteAPIKey);

 if(statusCode == 200) {
  Serial.println("channel update successful.");
 }
 else{
  Serial.println("problem Writing data. HTTP error code :"+
  String(statusCode));
 }
 delay(2000);
}