Projeto: Arduino como Relgio

O projeto utiliza a biblioteca Time, LCD por I2C e botes para alterar data e hora.

Vamos ao circuito:

Os botes servem para incrementar a hora, minuto, dia, ms e ano. O potencimetro controla o

contraste do LCD 16x2.

A programao TimeSerial foi modificada e est mostrada abaixo:

#include

#include

#include

#define TIME_MSG_LEN 11 // time sync to PC is HEADER followed by unix time_t as ten ascii

digits

#define TIME_REQUEST 7 // ASCII bell character requests a time sync message

LiquidCrystal_I2C lcd(56,16,2); //If

long previousmillis=0;

int hr=0;

int minut=0;

int dia=0;

int mes=0;

int ano=0;

int count=0;

void setup() {

lcd.init();

lcd.backlight();

pinMode(2,INPUT);

pinMode(3,INPUT);

pinMode(4,INPUT);

pinMode(5,INPUT);

pinMode(6,INPUT);

pinMode(7,INPUT);

Serial.begin(9600);

Serial.println("Waiting for sync message");

lcd.print("Waiting");

lcd.setCursor(0,1);

lcd.print("for sync message");

setTime(0,0,0,1,1,0);

}

void loop(){

if(Serial.available() )

{

processSyncMessage();

}

if((digitalRead(7)==HIGH)) //Change button

{

count=count+1;

Serial.println("OK");

if(count>1)

{

count=0;

}

}

if((digitalRead(3)==HIGH) && count==1) //Hour button

{

hr=3600;

adjustTime(hr);

}

if((digitalRead(2)==HIGH) && count==1) //Minute button

{

minut=60;

adjustTime(minut);

}

if((digitalRead(6)==HIGH) && count==1) //Day Button

{

dia++;

if(dia+day()>31)

{

dia=1-day();

}

}

if((digitalRead(5)==HIGH) && count==1) //Month button

{

mes++;

if(mes+month()>12)

{

mes=1-month();

}

}

if((digitalRead(4)==HIGH) && count==1) //Year Button

{

ano++;

}

if(timeStatus()!= timeNotSet)

{

digitalWrite(13,timeStatus() == timeSet); // on if synced, off if needs refresh

digitalClockDisplay();

}

delay(1000);

}

void digitalClockDisplay(){

// digital clock display of the time

lcd.clear();

lcd.print("Hora: ");

lcd.print(hour());

Serial.print(hour());

printDigits(minute());

printDigits(second());

lcd.setCursor(0,1);

Serial.print(" ");

Serial.print(dia+day());

lcd.print("Data: ");

lcd.print(dia+day());

lcd.print(".");

Serial.print(" ");

Serial.print(mes+month());

lcd.print(mes+month());

lcd.print(".");

Serial.print(" ");

Serial.print(ano+year());

lcd.print(ano+year());

Serial.println();

}

void printDigits(int digits){

// utility function for digital clock display: prints preceding colon and leading 0

Serial.print(":");

lcd.print(":");

if(digits < 10){

Serial.print('0');

lcd.print("0");

}

Serial.print(digits);

lcd.print(digits);

}

void processSyncMessage() {

// if time sync available from serial port, update time and return true

while(Serial.available() >= TIME_MSG_LEN ){ // time message consists of a header and ten

ascii digits

char c = Serial.read() ;

Serial.print(c);

if( c == TIME_HEADER ) {

time_t pctime = 0;

for(int i=0; i < TIME_MSG_LEN -1; i++){

c = Serial.read();

if( c >= '0' && c