/*
 * This ESP32 code is created by esp32io.com
 *
 * This ESP32 code is released in the public domain
 *
 * For more detail (instruction and wiring diagram), visit https://esp32io.com/tutorials/esp32-ultrasonic-sensor
 */
 
#include <WiFi.h>
#include <WiFiClientSecure.h>
#include <UniversalTelegramBot.h>
#include <ArduinoJson.h>

#define TRIG_PIN 18 // ESP32 pin GIOP23 connected to Ultrasonic Sensor's TRIG pin
#define ECHO_PIN 5 // ESP32 pin GIOP22 connected to Ultrasonic Sensor's ECHO pin
#define LED 2
#define LED2 4
float duration_us, distance_cm;
#include <LiquidCrystal_I2C.h>

// SSID dan Password WiFi
const char* ssid = "Wokwi-GUEST";
const char* password = "";

LiquidCrystal_I2C LCD = LiquidCrystal_I2C(0x27, 16, 2);
// Telegram BOT
#define BOTtoken "6341882486:AAFcySmgPpcPy_DCBxnIZ5BSyY4rPYS1YSc"
#define CHAT_ID "1226480150"
WiFiClientSecure client;
UniversalTelegramBot bot(BOTtoken,client);


void setup() {
  // begin serial port
   // begin serial port
  Serial.begin (115200);
  // Hubungkan ke Wi-Fi
  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);
  client.setCACert(TELEGRAM_CERTIFICATE_ROOT);

 


  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to Wifi.....");
  bot.sendMessage(CHAT_ID, "Welcome to VIN087 Bot", "");


  // configure the trigger pin to output mode
  pinMode(TRIG_PIN, OUTPUT);
  // configure the echo pin to input mode
  pinMode(ECHO_PIN, INPUT);
  pinMode(LED, OUTPUT);
  pinMode(LED2, OUTPUT);
  LCD.init();
  LCD.backlight();
  LCD.setCursor(0, 0);
  }
}

void loop() {
  // generate 10-microsecond pulse to TRIG pin
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);
 
  // measure duration of pulse from ECHO pin
  duration_us = pulseIn(ECHO_PIN, HIGH);
  
  // calculate the distance
  distance_cm = 0.017 * duration_us;
 
  // ligt up led if distance under limit
  if (distance_cm < 30) 
  {
    digitalWrite(LED, HIGH);
    bot.sendMessage(CHAT_ID, "Jarak terlalu dekat");
    delay(10);
  }else{digitalWrite(LED, LOW);
    bot.sendMessage(CHAT_ID, "Jarak aman");
  }
 
  // print the value to Serial Monitor
  Serial.print("Jarak air: ");
  Serial.print(distance_cm);
  Serial.println(" cm      ");
  Blink(LED2);
  delay(500);
  LCD.setCursor(0,0);
  LCD.print("Jarak: ");
  LCD.setCursor(6,0);
  LCD.print(distance_cm);
  LCD.setCursor (13,0);
  LCD.print ("cm");


}


void Blink(int x){
  digitalWrite(x, HIGH);
  delay(10);
  digitalWrite(x, LOW);
}