#include <DHTesp.h>
#include <WiFi.h>
#include<ThingSpeak.h>
char ssid[]="Wokwi-GUEST";
char pass[]="";

WiFiClient client ;
long myChannelNumber =  2658610;
const char * myWriteAPIKey="QC4ZWC4AQV7FC3LP";
int statusCode;

int trigger=12;
int echo=13;
int ledred=19;
int ledorange=18;
int ledgreen=5;

DHTesp deeshi;
TempAndHumidity data;

 void setup(){
  Serial.begin(115200);
  pinMode(trigger, OUTPUT);
  pinMode(echo, INPUT);
  pinMode(ledred, OUTPUT);//red
  pinMode(ledorange, OUTPUT);//orange)
  pinMode(ledgreen, OUTPUT);
  deeshi.setup(21,DHTesp::DHT22);
  WiFi.mode(WIFI_STA);
  ThingSpeak.begin(client);
   //green
 }

 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.println("Attempting to connect");
  while(WiFi.status()!=WL_CONNECTED)
  {
  WiFi.begin(ssid,pass);
  Serial.println(".");
  delay(2000);
  }
  Serial.println("\nconnected.");
 }
   int distance=finding_distance();
  data =deeshi.getTempAndHumidity();
  int temp=data.temperature;
  int hum=data.humidity;
  Serial.println("Distance  :" + String(distance ));
  Serial.println("Humidity :" +String(hum));
  Serial.println("Temperature  :" +String(temp));
  Serial.println("-------------------------");
  delay(1000);

  
  if(distance>300&&temp<30&& hum>70){
  digitalWrite(ledred,LOW);
  digitalWrite(ledorange,LOW);
  digitalWrite(ledgreen,HIGH);
  Serial.println("you are safe");
  }

  else if((distance<300 && distance>200)&&(temp>30&&temp<70)&&(hum>30&&hum<70)){
  digitalWrite(ledred, LOW);
    digitalWrite(ledgreen, LOW);
    digitalWrite(ledorange,HIGH);
    Serial.println("you are unsafe");

  }
  
  else {
  digitalWrite(ledgreen, LOW);
    digitalWrite(ledorange, LOW);
  digitalWrite(ledred, HIGH);
    
  Serial.println("you are in danger");

  }
  Serial.println("-------------------------");
  delay(100);
  {
    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));
     }
     delay(10);
     }
 }