#include <WiFi.h>
char ssid[] = "Wokwi-GUEST";
char pass[] = "";
int trigger=12;
int echo=14;
float distance;
#include <DHTesp.h>
#include <ThingSpeak.h>
WiFiClient client; //wifi client

DHTesp saradhi;
TempAndHumidity data;
long myChannelNumber = 2638382;
const char * myWriteAPIKey = "NV8MYLWIAKV5H19I";

void setup() {
    ThingSpeak.begin(client);
  Serial.begin(115200);
  WiFi.mode(WIFI_STA);
 saradhi.setup(18, DHTesp::DHT22);
pinMode(trigger, OUTPUT);
pinMode(echo, INPUT);
pinMode(22, OUTPUT);
pinMode(21, OUTPUT);
pinMode(16, OUTPUT);
   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.");
  } 
}

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() {

   data = saradhi.getTempAndHumidity();

  Serial.println("Humi : " + String(data.humidity));
  Serial.println("Temp : " + String(data.temperature));
  Serial.println("-----------------");
  delay(1000);
  
 int actual_distance= ultraperformance();
 Serial.println(actual_distance);
  delay(10);
  
  if(data.temperature<=30 && data.humidity>70 && actual_distance>300){
  digitalWrite(22, HIGH);
  digitalWrite(21, LOW);
  digitalWrite(16, LOW);
  Serial.println("you are safe");
  }

  else if(data.temperature>=30 && data.humidity<=70 && actual_distance>=200 && actual_distance<=300){ 
  digitalWrite(21, HIGH);
  digitalWrite(22, LOW);
  digitalWrite(16, LOW);
  Serial.println("you are unsafe");// this speeds up the simulation
}

  else if(data.temperature>70 && data.humidity<30 && actual_distance<=200){
  digitalWrite(16, HIGH);
  digitalWrite(21, LOW);
digitalWrite(22, LOW);
  tone(4,9000);
noTone(4);
Serial.println("you are in danger");

  }
  ThingSpeak.setField(1,data.temperature); //set feilds for temperature
  ThingSpeak.setField(2,data.humidity); //set feilds for humidity
  ThingSpeak.setField(3,actual_distance);//set feilds for ultrasonic

 int statusCode = ThingSpeak.writeFields(myChannelNumber, myWriteAPIKey);
  //writing values into thinkspeak through myChannelNumber, myWriteAPIKey
 
//checking if values whether send to thingspeak or not

  if(statusCode==200){
    Serial.println("Channel update successful.");
  }

  else {
    Serial.println("Problem Writing data. HTTP error code :" +
    String(statusCode));
  }
delay(20000);
}