#include <ThingSpeak.h>
#include <WiFi.h>
const char * SSID = "Wokwi-GUEST";
const char * PASS = "";
WiFiClient client;
unsigned long ChannelNumber = 1990436;
const char * APIKey = "QYWBYI1TV8SL3AF3";

const byte buzzPin = 19;
const byte trigPin = 26;
const byte echoPin = 25;
const byte pirPin = 27;

//Buzzer Setting
int freqB = 900;
int chanlB = 0;
int resoB = 8;
int dutyCycleB = 128;

//Ultrasonik Setting
float waktu, jarak;

void setup() {
  WiFi.begin(SSID, PASS);
  Serial.print("Connecting");
  while (WiFi.status() != WL_CONNECTED)
  {
    delay(500);
    Serial.print(".");
  }
  Serial.println();
  Serial.print("Connected, IP address: ");
  Serial.println(WiFi.localIP());
  ThingSpeak.begin(client);

  Serial.begin(115200);

  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  pinMode(pirPin, INPUT_PULLUP);

  ledcSetup(chanlB, freqB, resoB);
  ledcAttachPin(buzzPin, chanlB);
}

void loop() {
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(100);
  digitalWrite(trigPin, LOW);

  waktu = pulseIn(echoPin, HIGH);
  jarak = 0.017 * waktu;

  int pirSensor = digitalRead(pirPin);
  
  if(pirSensor == 1){

    Serial.println("ADA GERAKAN");
    delay(300);

    if (jarak < 250){
      Serial.print("JARAK :");
      Serial.print(jarak);
      Serial.println("cm");
      ledcWrite(chanlB, dutyCycleB);
      delay(300);
    }
    else {
      Serial.print("JARAK LEBIH DARI ");
      Serial.print(jarak);
      Serial.println("cm");
      delay(300);
    }
  }
  else {
    Serial.println("TIDAK ADA GERAKAN");
    ledcWrite(chanlB, 0);
    (jarak = 0);
    delay(1000);
  }

}