#include <LiquidCrystal.h>
#include <DS1307RTC.h>
#define tlacitko 10 //Dočasně

int owo = 0;
int led = 9; //Dočasně
int analogInput = 0;
float vout = 0.0;
float vin = 0.0;
float R1 = 100000.0; // Odpor R1 (100K)
float R2 = 10000.0; // Odpor R2 (10K)
int value = 0;
int a[5] = {};
unsigned long previousMillis = 0;
unsigned long previousMillis2 = 0;
boolean svetlo = false; //Dočasně
boolean enable; //Dočasně

LiquidCrystal lcd(2, 3, 4, 5, 6, 7);
void setup() {
  Serial.begin(9600);

  pinMode(analogInput, INPUT);
  pinMode(led, OUTPUT); //Dočasně
  pinMode(tlacitko, INPUT_PULLUP); //Dočasně

  lcd.begin(16, 2);
  lcd.setCursor(1, 0);
  lcd.print("Renault  Power");
  lcd.setCursor(0, 1);
  lcd.print("-Mareckovo  LGL-");
  delay(5000); // Čas uvítání
  lcd.clear();
  
 rtc_setup();
}
void loop() {
  //----------------------------------------
  if (digitalRead(tlacitko) && enable == false){
  if (svetlo) {
    svetlo = false;
  } 
  else {
    svetlo = true;
  }
    
  digitalWrite(led, svetlo);
  enable=true;
  }
  if (digitalRead(tlacitko)==false)
  {
    enable=false;
  }
  //---------------------------------------- 
    if (millis() - previousMillis >= 5000) {
    // save the last time you blinked the LED
    previousMillis = millis();
    owo++;

  }
  switch(owo){
    case 0:
    time();
    break;
    case 1:
    lcd.clear();
    owo++;
    break;
    case 2:
    messure();
    break;
    case 3:
    lcd.clear();
    owo = 0;
    break;
  }
}
void messure(){

  lcd.setCursor(0, 0);
  lcd.print("Markovo volty:");
  // Čtení vstupních analogových hodnot
  value = analogRead(analogInput);
  vout = (value * 5) / 1024.0;
  vin = vout / (R2 / (R1 + R2));
  Serial.println(vin);
  if (vin < 0.09)
  {
    vin = 0.0;
  }
  lcd.setCursor(0, 1);
  lcd.print("Napeti V :");
  lcd.print(vin);
  delay(300); // Čas změny hodnoty na displeji
}
void time(){
  
  lcd.setCursor(0, 0);
  lcd.print("Markovo cas:");
  lcd.setCursor(4, 1);
  lcd.print((String)hour() + ":");
  if (minute() < 10) {
    lcd.print("0");
  }
  lcd.print((String)minute() + ":");
  if (second() < 10) {
    lcd.print("0");
  }
  lcd.print(second());
}
void rtc_setup() {
  setSyncProvider(RTC.get);   // the function to get the time from the RTC
  if (timeStatus() != timeSet)
    Serial.println("Unable to sync with the RTC");
  else
    Serial.println("RTC has set the system time");
  if (timeStatus() == timeSet) {
  Serial.print(hour());
  serial_printDigits(minute()); 
  serial_printDigits(second());
  Serial.println((String)" " + day() + "." + month() + "." + year());
  }
  else {
    Serial.println("The time has not been set.  Please run the Time\r\n");
    delay(4000);
  }
}
  void serial_printDigits(int digits) {
  // utility function for digital clock display: prints preceding colon and leading 0
  Serial.print(":");
  if (digits < 10)
    Serial.print('0');
  Serial.print(digits);
  }