#include <LiquidCrystal_I2C.h>
#include <ESP32Servo.h>
#include <WiFi.h>
#include "ThingSpeak.h"

const char* ssid = "Wokwi-GUEST";
const char* password = "";
const int myChannelNumber = 2561732;
const char* myAPIKey = "I6P5Q1VIU8WDZEKT";
const char* server = "api.thingspeak.com";
WiFiClient client;

const int servoPin = 16;
LiquidCrystal_I2C LCD = LiquidCrystal_I2C(0x27, 16, 2);

#define trigPin 12
#define echoPin 13
#define BUZZER_PIN 4

Servo myservo;
long duration;
int distance;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  myservo.attach(servoPin, 1000, 2400);
  LCD.init();
  LCD.backlight();
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  pinMode(BUZZER_PIN, OUTPUT);
  LCD.println("SELAMAT DATANG!!");

  WiFi.begin(ssid, password);
  Serial.println("Connecting");
  while (WiFi.status() != WL_CONNECTED){
    delay(500);
    Serial.print(".");
  }

  Serial.println("Wifi connected !");
  Serial.println(WiFi.localIP());
  WiFi.mode(WIFI_STA);
  ThingSpeak.begin(client); //memulai thingspeak
}

void loop() {
  // put your main code here, to run repeatedly:
  myservo.write(90);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  duration = pulseIn(echoPin, HIGH);
  float distance = duration * 0.034 / 2;
  Serial.print("JARAK : ");
  Serial.print(distance);
  Serial.println(" cm");
  delay(1000);
  
  if (distance >= 150 && distance <= 200) 
  {
    myservo.write(0); 
    tone(BUZZER_PIN, 1000);   
    delay(1000);
    noTone(BUZZER_PIN);
    LCD.clear();
    LCD.setCursor(0,0);
    LCD.println("SILAHKAN TEMPEL");
    LCD.setCursor(6,1);
    LCD.print("KARTU");
    delay(3000);
  }
  
  else if (distance > 200)
  {
    myservo.write(90);
    noTone(BUZZER_PIN);
    LCD.clear();
    LCD.println("SELAMAT DATANG!!");
    //delay(3000);
  }

  else
  {
    myservo.write(90);
  }

  delay(10);
  ThingSpeak.setField(1,distance);
  int x = ThingSpeak.writeFields(myChannelNumber,myAPIKey);

  
}