Orologio Lcd

Collegamenti;

led = 8
botton =  9
lcd = 7,6,5,4,3,2
rtc = SCL, SDA


la libreria per l'RTC è      #include "RTClib.h"      fatta da Adafruit

Codice;

#include <Wire.h>
#include "RTClib.h"
#include <LiquidCrystal.h>
LiquidCrystal lcd(7, 6, 5, 4, 3, 2);
RTC_DS3231 rtc;
char *res = malloc(5);
int led = 8;
int stato = true;
int botton = 9;
void setup() {
  Serial.begin(9600);
  lcd.begin(16, 2);
  if (!rtc.begin()) {
    Serial.println("Controlla le connessioni");
    while (true);
  }
  lcd.print("_ Ben tornato _");
  delay(1500);
  lcd.clear();
  if (rtc.lostPower()) {
    Serial.println("Imposto data/ora");
    rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
  }
}
String pad(int n) {
  sprintf(res, "%02d", n);
  return String(res);
}
void loop() {
  lcd.clear();
  if (digitalRead(botton) == HIGH) {
    !stato;
  }
  if (stato == false) {
    digitalWrite(led, LOW);
  }
  if (stato == true) {
    digitalWrite(led, HIGH);
  }
  DateTime now = rtc.now();
  /////////////////////////////////////////////////////////////////////////////         parte serialport
  Serial.print(now.year(), DEC);
  Serial.print('/');
  Serial.print(pad(now.month()));
  Serial.print('/');
  Serial.print(pad(now.day()));
  Serial.print(" - ");
  Serial.print(pad(now.hour()));
  Serial.print(':');
  Serial.print(pad(now.minute()));
  Serial.print(':');
  Serial.print(pad(now.second()));
  Serial.println();
  /////////////////////////////////////////////////////////////////////////////         parte lcd
  lcd.setCursor(0, 0);
  lcd.print(now.year(), DEC);
  lcd.print('/');
  lcd.print(pad(now.month()));
  lcd.print('/');
  lcd.print(pad(now.day()));
  lcd.setCursor(1, 0);
  lcd.print(pad(now.hour()));
  lcd.print(':');
  lcd.print(pad(now.minute()));
  lcd.print(':');
  lcd.print(pad(now.second()));
  delay(10);
}