#include  <DHTesp.h>
#include <WiFi.h>
#include <ThingSpeak.h>

int trig =25;
int echo =34;
float green = 22;
float orange = 5;
float red =19;
float distance;
DHTesp kavin;
TempAndHumidity data;

char ssid[] = "Wokwi-GUEST";
char pass[] = "";

WiFiClient client;
 long myChannelNumber = 2614365;
const char * myWriteAPIKey = "KGGAARSOR5OIMJER";
int statusCode;

void setup() {
 Serial.begin(115200);
 kavin.setup(18, DHTesp:: DHT22);
 pinMode(trig, OUTPUT);
 pinMode(echo, INPUT);
 pinMode(green, OUTPUT);
 pinMode (orange, OUTPUT);
 pinMode(red,OUTPUT);
 tone(22, OUTPUT);

 WiFi.mode(WIFI_STA);

 ThingSpeak.begin(client);

}

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 = kavin.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 (actual_distance>300 && data.humidity>70 && data.temperature<30) {
 digitalWrite(green, HIGH);
 digitalWrite(orange, LOW);
 digitalWrite(red, LOW);
 Serial.println("you are safe");
 tone(21,LOW);
 }
 else if(actual_distance>=200 && data.humidity<=70 && data.temperature>=30 &&data.humidity<=30 && data.temperature<=70){
 digitalWrite(orange ,HIGH);
 digitalWrite(green, LOW);
 digitalWrite(red, LOW);
 tone(21,LOW);
 Serial.println("you are unsafe");
 }
 else if(actual_distance>=0 && actual_distance<200 && data.humidity<30 && data.temperature<70){
 digitalWrite(red ,HIGH);
 digitalWrite(orange , LOW);
 digitalWrite(green, LOW);
 tone (21,100);
 Serial.println("you are in danger");
}
 else{
 digitalWrite(green, LOW);
 digitalWrite(orange, LOW);
 digitalWrite(red, LOW);
 tone (21,100);
 }
   ThingSpeak.setField(1, data.temperature);
   ThingSpeak.setField(3, data.humidity);
   ThingSpeak.setField(5, actual_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));
}
delay(1000);
 }