#include <WiFi.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <HX711.h>

LiquidCrystal_I2C LCD = LiquidCrystal_I2C(0x27, 20, 4);
HX711 loadcell;

#define NTP_SERVER     "id.pool.ntp.org"
#define UTC_OFFSET     7 * 3600
#define UTC_OFFSET_DST 0
#define LOADCELL_DOUT_PIN 18
#define LOADCELL_SCK_PIN 19
#define ldrPin 34

const char* ssid = "Wokwi-GUEST";
const char* pass = "";
const int led = 2;
int startTime = 0;
int hitung = 0;
int data = 0;

const float gama = 0.7;
const float rl10 = 50;

void spinner() {
  static int8_t counter = 0;
  const char* glyphs = "\xa1\xa5\xdb";
  LCD.setCursor(19, 3);
  LCD.print(glyphs[counter++]);
  if (counter == strlen(glyphs)) {
    counter = 0;
  }
}

void printLocalTime() {
  struct tm timeinfo;
  if (!getLocalTime(&timeinfo)) {
    LCD.setCursor(0, 0);
    LCD.println("Connection Err");
    return;
  }

  LCD.setCursor(0, 0);
  LCD.println(&timeinfo, "%H:%M:%S WIB      ");
}

void setup() {
  Serial.begin(115200);

  LCD.init();
  LCD.backlight();
  LCD.setCursor(1, 1);
  LCD.print("Booting System....");

  WiFi.begin(ssid, pass);
  while (WiFi.status() != WL_CONNECTED) {
    delay(250);
    spinner();
  }

  Serial.println("");
  Serial.println("WiFi connected");
  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());

  loadcell.begin(LOADCELL_DOUT_PIN, LOADCELL_SCK_PIN);
  loadcell.set_scale(0.42); 
  loadcell.tare();

  pinMode(led, OUTPUT);

  LCD.clear();
  LCD.setCursor(4, 1);
  LCD.println("IMOS CONNECT               ");
  
  configTime(UTC_OFFSET, UTC_OFFSET_DST, NTP_SERVER);
  startTime = millis();
}

void loop() {
  float loadcell_reading = loadcell.get_units();
  
  unsigned long currentTime = millis();

  int nilaiLDR = analogRead(ldrPin);
  nilaiLDR = map(nilaiLDR, 4095, 0, 1024, 0);
  float voltase = nilaiLDR / 1024.*5;
  float resistansi = 2000 * voltase / (1-voltase/5);
  float kecerahan = pow(rl10*1e3*pow(10,gama)/resistansi,(1/gama));
  int droplets = hitung * 60000 / (currentTime - startTime);
  printLocalTime();

  Serial.print("Kecerahan = ");
  Serial.print(kecerahan);
  Serial.print(" Lux ");
  Serial.print("; Beban = ");
  Serial.print(loadcell_reading);
  Serial.println(" gram ");

  LCD.setCursor(0, 1);
  LCD.print("Beban: ");
  LCD.print(loadcell_reading);
  LCD.print(" g       ");

  // LCD.setCursor(0, 2);
  // LCD.print("Tetes: ");
  // LCD.print(startTime);
  // LCD.setCursor(0, 3);
  // LCD.print(data);  

  digitalWrite(led, HIGH);

  if (loadcell_reading >= 1000) {
    hitung++;
    // data = hitung;
    // startTime = currentTime;
    // currentTime = 0;
  }
  if (hitung >= 5) {
    startTime = currentTime;
    data = droplets;
    hitung = 0;
    droplets = 0;
  }

  LCD.setCursor(0, 2);
  LCD.print("Tetes : ");
  LCD.print(data);
  delay(10);
}