#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,16,2);
const int pb = 7;
const int led = 4;
const int buzzer = 5;
int pbvalue;
unsigned long previousMillis = 0;
unsigned long interval = 2000; //ms
unsigned long intervalBuzzer = 500;
bool switchstate = false;
int buzzerstate = 0;

/*#include "LoRa.h"
#include <SoftwareSerial.h>

SoftwareSerial myserial(15, 14);
e220ttl = (myserial);*/


void setup() {

  //e220ttl.begin();

  lcd.init();
lcd.clear();
lcd.backlight();
  Serial.begin(9600);
  pinMode(pb, INPUT_PULLUP);
  pinMode(4, OUTPUT);
  digitalWrite(4, 0);
pinMode(5, OUTPUT);
  digitalWrite(5, 0);
}

void loop() {
   
  unsigned long currentMillis = millis();
pbvalue = digitalRead(pb);
 
  //Serial.println(pbvalue);

  
   if ((pbvalue) == 0){
      switchstate = true;
      //Serial.println(switchstate);
    if (currentMillis - previousMillis >= interval) {
    previousMillis = currentMillis;
      Serial.println("sesuatu");

    }
      digitalWrite(4, 1);
      if (currentMillis - previousMillis >= intervalBuzzer){
        previousMillis = currentMillis;
        if (buzzerstate == 0){
          buzzerstate = 1;
        
        }
        else{
          buzzerstate = LOW;

        }
        digitalWrite(5, buzzerstate);
          Serial.println(buzzerstate);
      }
 }
 else{
      switchstate = false;
      Serial.println(switchstate);
  digitalWrite(4, 0);
  if (currentMillis - previousMillis >= interval) {
    previousMillis = currentMillis;
  Serial.println("aman");
 }
 }
  lcd.setCursor(0,0);
  lcd.print("Status :");
  lcd.setCursor(9,0);
  lcd.print(switchstate);
  //lcd.read(switchstate);
  if (switchstate == true){
    lcd.setCursor(0,1);
    lcd.print("DNG");
  }
  else {
    lcd.setCursor(0,1);
    lcd.print("OK ");
  }
delay(100);
}