#include <DHTesp.h>
#include <WiFi.h>
#include <ThingSpeak.h>;
WiFiClient client;
 long myChannelNumber = 2614322;
const char * myWriteAPIKey = "RMR1ONXMAPD7PNMR";
int statusCode;
char ssid[] = "Wokwi-GUEST";
char pass[] = "";
int trig =26;
int echo =27;
float green =4;
float orange =5;
float red =21;
float distance;
DHTesp APSARA; 
TempAndHumidity data;

void setup() {
  ThingSpeak.begin(client);
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  // put your setup code here, to run once:
  Serial.begin(115200);
WiFi.mode(WIFI_STA);
 Serial.begin(115200);
 APSARA.setup(18, DHTesp:: DHT22);
 pinMode(trig, OUTPUT);
 pinMode(echo, INPUT);
 pinMode(green, OUTPUT);
 pinMode (orange, OUTPUT);
 pinMode(red,OUTPUT);
 tone(2, OUTPUT);
}
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() {
   // put your main code here, to run repeatedly:
  ThingSpeak.setField(1, getdistance());

  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
}
   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
  data = APSARA.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) {
 digitalWrite(green, HIGH);
 digitalWrite(orange, LOW);
 digitalWrite(red, LOW);
 Serial.println("You Are Safe");
 }

 else if(actual_distance>=200 && actual_distance <300){
 digitalWrite(orange ,HIGH);
 digitalWrite(green, LOW);
 digitalWrite(red, LOW);
 Serial.println("You Are Unsafe");
 }

 else if(actual_distance>=0 && actual_distance<200 ){
 digitalWrite(red ,HIGH);
 digitalWrite(orange , LOW);
 digitalWrite(green, LOW);
 tone(2,15000);
 Serial.println("You Are in Danger");
}

 else{
 digitalWrite(green, LOW);
 digitalWrite(orange, LOW);
 digitalWrite(red, LOW);
 tone (2,15000);
 Serial.println("Condition Not Matched");
 }
}