#include <DHTesp.h>
#include <WiFi.h>
#include <ThingSpeak.h>
char ssid[] = "Wokwi-GUEST";
char pass[] = "";  
WiFiClient client;
long myChannelNumber =  2651085;
const char * myWriteAPIKey = "5FBHA0DKC536VHY3";
int statusCode;

DHTesp range;
TempAndHumidity data;
int trigger=12;
int echo=14;
int light1=5;
int light2=17;
int light3=16;

void setup() {
  ThingSpeak.begin(client);
  // put your setup code here, to run once:
  Serial.begin(115200);
  WiFi.mode(WIFI_STA);
 
 range.setup(18, DHTesp::DHT22);
  pinMode(trigger, OUTPUT);
  pinMode(echo, INPUT);
  pinMode(light1, OUTPUT);
  pinMode(light2, OUTPUT);
  pinMode(light3, OUTPUT);
}
int Ultra_sonic(){
  digitalWrite(trigger, HIGH);
  delay(100);
  digitalWrite(trigger, LOW);
 float recieved= pulseIn(echo, HIGH);
 float converted=(recieved*0.034/2)+1;
 return(converted);

}

void loop() {
  // put your main code here, to run repeatedly:
 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 = range.getTempAndHumidity();

  Serial.println("Humi : " + String(data.humidity));
  Serial.println("Temp : " + String(data.temperature));
  Serial.println("-----------------");
  delay(1000);
  int actual_distance=Ultra_sonic();
  Serial.println(actual_distance);
  delay(1000);
 
 if((actual_distance>300)&&(data.humidity<70)&&(data.temperature<30))
 {
    digitalWrite(light3, HIGH);
    digitalWrite(light2, LOW);
    digitalWrite(light1, LOW);
    Serial.println("you are safe");
}
if((actual_distance>=200&&actual_distance<=300)&&(data.humidity<70&&data.humidity>=30)&&(data.temperature>=30&&data.temperature<70))
{
  digitalWrite(light2, HIGH);
  digitalWrite(light3, LOW);
  digitalWrite(light1, LOW);
  Serial.println("be in consious");
}
if((actual_distance<200)&&(data.humidity<30)&&(data.temperature>70))
{
  digitalWrite(light3, LOW);
  digitalWrite(light2, LOW);
  digitalWrite(light1, HIGH);
  Serial.println("you are in danger");
}
  
  ThingSpeak.setField(3, data.temperature);
   ThingSpeak.setField(2, data.humidity);
    ThingSpeak.setField(1,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(10); // this speeds up the simulation
}