//20240626 prj23 01 RTC SW  DHT  sensor LCD I2C Copy
//https://wokwi.com/projects/344892587898831442
//DHT-sensor-library examples
//https://wokwi.com/projects/305979285237137984  //RTC 

// Example testing sketch for various DHT humidity/temperature sensors
// Written by ladyada, public domain
// REQUIRES the following Arduino libraries:
// - DHT Sensor Library: https://github.com/adafruit/DHT-sensor-library
// - Adafruit Unified Sensor Lib: https://github.com/adafruit/Adafruit_Sensor

#include <DHT.h>  // DHT sensor library 
#include <LiquidCrystal_I2C.h>  // lcd I2C library 
#include "RTClib.h" // RTC library

#define pled14 14  // pin 14 leg DHT22 

// Library nicname
DHT dht(pled14, DHT22); // dht is nicname
LiquidCrystal_I2C lcd(0x27, 16, 2); // lcd is nicname  16 ตัวอักษร 2 แถว
RTC_DS1307 rtc; // rtc is nicname

// global variable
int temp; // DHT sensor Temperature
int hum; // DHT sensor Huminity

//  RTC global variable ymd 
int y; //  now.year(); พศ +543;
int m; // now.month(); month
int d; // now.day(); day

//  Time global variable hm1s 
int h; //  hour 
int mi; // minute
int s; // second 

//  sw about time
int swtime = 0 ; // sw 13 time เก็บสถานะ sw



// setup()
void setup(){

  Serial.begin(115200); // Serial monitor
  dht.begin(); // dht module activate 

  lcd.init(); // lcd module activate 
  lcd.backlight(); // lcd backlight activate
  lcd.noBlink();
  lcd.noCursor();

  pinMode(12, INPUT_PULLUP); // led yellow
  pinMode(13, INPUT_PULLUP); // led green

}
//  loop()
void loop(){

  int sw1 = digitalRead(13);
  if (sw1 == 0){ 
  
    swtime = !swtime;
    lcd.clear();
  }
  
  if (swtime == 1) {
  
      time();
  
  }
  Serial.println(swtime);
    
}
// eof loop()
// display Temperature, Humidity
void displaytemp(){

  lcd.clear();
  temp = dht.readTemperature();
  hum  = dht.readHumidity();
  // Serial monitor on screen to tracking
  Serial.print("temp ");
  Serial.print(temp);
  Serial.print(" Hum ");
  Serial.println(hum);

  // diskplay on lcd I2C for work
 
  lcd.setCursor(0, 0);
  lcd.print("Temp ");
  lcd.print(temp);
  delay(100);
  lcd.setCursor(5,0);
  lcd.print("  ");
  delay(100);

  lcd.setCursor(8,0);
  lcd.print("Hum ");
  lcd.print(hum);
  lcd.print("   ");  
  delay(1500);

}
// eof function displaytemp()
// function hello()
void hello(){
  
  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("  Hello World");

}
// eof function hello()
// lcd.print zero when >=1 month || day < 10
void lzeroDayMonth(int dm){
  if (dm<10) {
    lcd.print("0");
  }
}
// Serial.print zero when >=1 month || day < 10
void SzeroDayMonth(int dm){
  if (dm<10) {
    Serial.print("0");
  }
}
//
// function hello()
void time(){
  
  rtc.begin();

  DateTime now = rtc.now();

  y = now.year(); // พศ +543;
  m = now.month(); // month
  d = now.day(); // day

  h = now.hour(); //  hour 
  mi = now.minute(); // minute
  s = now.second(); // second

  // display date on Serial monitor  
  Serial.print(y);
  Serial.print(" ");
  SzeroDayMonth(m);

  Serial.print(m);
  Serial.print(" ");
  SzeroDayMonth(d);
  Serial.println(d);
  /////////////////////////////////
  // display date on lcd I2C
  lcd.setCursor(0,0);
  lcd.print("Date ");
  lcd.print(y);
  lcd.print(" ");
  lzeroDayMonth(m);
  
  lcd.print(m);
  lcd.print(" ");
  lzeroDayMonth(d);
  lcd.println(d);
  // eof date lcd i3c
  //
  // display hour minute second on lcd I2C
  lcd.setCursor(0,1);
  lcd.print("Time ");

  lzeroDayMonth(h);
  lcd.print(h);
  lcd.print(" ");

  lzeroDayMonth(mi);
  lcd.print(mi);
  lcd.print(" ");
  
  lzeroDayMonth(s);
  lcd.println(s);

  // eof Time on  lcd i3c

}
// eof function time() 
// eof program