#include <WiFi.h>
#include <DHTesp.h>
#include <ThingSpeak.h>
char ssid[] = "Wokwi-GUEST";
char pass[] = "";
int trigger=14;
int echo=12;
float distance;
DHTesp sujith;
TempAndHumidity data;
WiFiClient client;
 long myChannelNumber =   2614386;
const char * myWriteAPIKey = "E2QFR39O15U9QB6H";
int statusCode;

void setup() {

  Serial.begin(115200);
WiFi.mode(WIFI_STA);
  // put your setup code here, to run once:
  Serial.begin(115200);
 sujith.setup(18, DHTesp::DHT22);

  pinMode(trigger, OUTPUT);
  pinMode(echo, INPUT);
  pinMode(23, OUTPUT);
  pinMode(2, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(32, OUTPUT);
  ThingSpeak.begin(client);
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  
}
int ultraperformance(){
digitalWrite(trigger, LOW);
delay(10);
digitalWrite(trigger, HIGH);
delay(100);
digitalWrite(trigger,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.");
 

  }


  // put your main code here, to run repeatedly:
  delay(10); // this speeds up the simulation
  int actual_distance= ultraperformance();
 Serial.println(actual_distance);

  data = sujith.getTempAndHumidity();

  Serial.println("Humi : " + String(data.humidity));
  Serial.println("Temp : " + String(data.temperature));

 if (actual_distance>300 && data.temperature<30 && data.humidity>70){ 
  digitalWrite(23, HIGH);
  digitalWrite(2, LOW);
  digitalWrite(4, LOW);
  Serial.println("You are safe");
 }

else if (actual_distance>=200 && actual_distance<=300 && data.temperature>=30 && data.temperature<=70 && data.humidity>=30 && data.humidity<=70){
    digitalWrite(23, LOW);
    digitalWrite(2, HIGH);
    digitalWrite(4, LOW);
    Serial.println("You are safe");
}

else if (actual_distance>=0 && actual_distance<=200 && data.temperature>=70 && data.humidity<=30){
  digitalWrite(23,LOW);
  digitalWrite(2, LOW);
  digitalWrite(4, HIGH);
  Serial.println("You are in danger");
  tone(32,10000);
}

else{
    digitalWrite(23, LOW);
  digitalWrite(2, LOW);
  digitalWrite(4, LOW); 
  Serial.println("Problem Writing data. HTTP error code :" +
String(statusCode));
}

ThingSpeak.setField(3,actual_distance);

ThingSpeak.setField(1,data.temperature);
ThingSpeak.setField(2,data.humidity);


  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); // this speeds up the simulation
  delay(10); // this speeds up the simulation
}