#include <WiFi.h>
#include <ThingSpeak.h>
int trigger = 14;
int echo = 12;
int pir = 27;
int buz = 16;
char ssid[] = "Wokwi-GUEST";
char pass[] = "";
long myChannelNumber =2627272 ;
const char * myWriteAPIKey = "1G59647VKWZL6XMN";
int statusCode;
WiFiClient client;
void setup() {
  ThingSpeak.begin(client);
  Serial.begin(115200);
  pinMode(trigger, OUTPUT);
  pinMode(echo, INPUT);
  pinMode(buz, OUTPUT);
  pinMode(pir, INPUT);
  WiFi.mode(WIFI_STA);
}

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

  if (WiFi.status() == WL_CONNECTED)
  {
    int actualdistance = ultrasonic();
    Serial.println(actualdistance);
    delay(1000);
    const int IP = digitalRead(pir);
    Serial.println(IP);
    delay(100);
    if (IP == 1 && actualdistance <= 200)
    {
      tone(buz, 1000);
      delay(1000);
    }
    else
    {
      noTone(buz);
      delay(1000);

    }
    ThingSpeak.setField(1, actualdistance);
    ThingSpeak.setField(2, pir);
    
    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);
  }
}
int ultrasonic ()
{
  digitalWrite(trigger, LOW);
  delay(10);
  digitalWrite(trigger, HIGH);
  delay(100);
  digitalWrite(trigger, LOW);
  int distance = pulseIn(echo, HIGH);
  // return(distance);
  return (distance * 0.034 / 2) + 1;
}