#include <DHTesp.h>
#include <WiFi.h>
#include <ThingSpeak.h>
WiFiClient client;
long myChannelNumber = 2652650;
const char * myWriteAPIKey = "43QQC6GWY79CPCGJ";
int statusCode;
char ssid[] = "Wokwi-GUEST";
char pass[] = "";  
DHTesp pavi;
TempAndHumidity data;

int trigger=4;
int echo=5;
int green=27;
int orange=26;
int red=33;


void setup() {

  // put your setup code here, to run once:
  Serial.begin(115200);
  pavi.setup(18,DHTesp::DHT22);
  pinMode(trigger, OUTPUT);
  pinMode(echo, OUTPUT);
  pinMode(green, OUTPUT);
  pinMode(orange, OUTPUT);
  pinMode(red, OUTPUT);
  WiFi.mode(WIFI_STA);
  ThingSpeak.begin(client);

}

int finding_distance(){
  digitalWrite(trigger, HIGH);
  delay(1000);
  digitalWrite(trigger, LOW);
  float a=pulseIn(echo,HIGH);
  return(a*0.034/2);
}

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 = pavi.getTempAndHumidity();
  Serial.println("Humi : " + String(data.humidity));
  Serial.println("Temp : " + String(data.temperature));
  Serial.println("--------------------------");
  delay(1000);
  // put your main code here, to run repeatedly:
  int distance=finding_distance();
  Serial.println(distance);
  if(distance>300 && data.temperature<30 && data.humidity>70){
    digitalWrite(green, HIGH);                                       
    digitalWrite(orange, LOW);
    digitalWrite(red, LOW);
    delay(2000);
    Serial.println("you are safe");
  }else if(distance>200 && distance<=300 && data.temperature>30 && data.temperature<=70 && data.humidity>30 && data.humidity<=70){
  digitalWrite(green,LOW);
  digitalWrite(orange, HIGH);
  digitalWrite(red, LOW);                               
  delay(2000);
  Serial.println("you are unsafe");
  }
  else if(distance<200 && data.temperature>70 && data.humidity<30){
    digitalWrite(orange, LOW);
    digitalWrite(red, HIGH);
    digitalWrite(green, LOW);
    delay(2000);
    Serial.println("you are danger");
  }
 else{
  digitalWrite(green, LOW);
  digitalWrite(orange, LOW);
  digitalWrite(red, LOW);
  Serial.println("no detect");
  }
   ThingSpeak.setField(2, data.temperature);
   ThingSpeak.setField(3, data.humidity);
    ThingSpeak.setField(1, 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));
}



   // this speeds up the simulation
}