system
1
hi, need help with my arduino mega 2560 and RTC. how can i display the right weekday from this code? .now doesnt work.
#include <Wire.h>
#include "RTClib.h"
#include <Time.h>
RTC_DS1307 RTC;
char *monthName[13] = {
"" ,"January", "February", "March", "April", "May", "June",
"July", "August", "September", "October", "November", "December"
};
void setup () {
Serial.begin(9600);
Wire.begin();
RTC.begin();
if (! RTC.isrunning()) {
Serial.println("RTC is NOT running!");
// following line sets the RTC to the date & time this sketch was compiled
RTC.adjust(DateTime(__DATE__, __TIME__));
}
}
void loop () {
DateTime now = RTC.now();
Serial.print(dayStr(weekday()));
Serial.println(monthName[now.month()]);
Serial.print('/');
Serial.print(now.day(), DEC);
Serial.print('/');
Serial.print(now.year(), DEC);
Serial.print(' ');
Serial.print(now.hour());
Serial.print(':');
Serial.print(now.minute(), DEC);
Serial.print(':');
Serial.print(now.second(), DEC);
Serial.println();
delay(1000);
}
Thank you! 
system
2
.now doesnt work.
Please explain.
Does the code compile?
Serial.print(dayStr(weekday()));
Shouldn't that be now.weekday()?
The DS1307 outputs a number for the DoW and you switch on case.
There is a system for it here http://bildr.org/2011/03/ds1307-arduino/
which I use as a standard code.
//Arduino 1.0+ Only
//Arduino 1.0+ Only
#include <PCD8544.h>
#include "Wire.h"
#define DS1307_ADDRESS 0x68
static PCD8544 lcd;
void setup(){
Wire.begin();
Serial.begin(9600);
lcd.begin(84, 48);
// Print a message to the LCD.
lcd.setCursor(0,0);
lcd.print("Today it is");
}
void loop(){
printDate();
delay(1000);
}
byte bcdToDec(byte val) {
// Convert binary coded decimal to normal decimal numbers
return ( (val/16*10) + (val%16) );
}
void printDate(){
// Reset the register pointer
Wire.beginTransmission(DS1307_ADDRESS);
byte zero = 0x00;
Wire.write(zero);
Wire.endTransmission();
Wire.requestFrom(DS1307_ADDRESS, 7);
int second = bcdToDec(Wire.read());
int minute = bcdToDec(Wire.read());
int hour = bcdToDec(Wire.read() & 0b111111); //24 hour time
int weekDay = bcdToDec(Wire.read()); //0-6 -> sunday - Saturday
int monthDay = bcdToDec(Wire.read());
int month = bcdToDec(Wire.read());
int year = bcdToDec(Wire.read());
lcd.setCursor(21,1);
switch (weekDay) // Friendly printout the weekday
{
case 1:
lcd.print("MONDAY ");
Serial.print("MON ");
break;
case 2:
lcd.print("TUESDAY ");
Serial.print("TUE ");
break;
case 3:
lcd.print("WEDNESDAY ");
Serial.print("WED ");
break;
case 4:
lcd.print("THURSDAY ");
Serial.print("THU ");
break;
case 5:
lcd.print("FRIDAY ");
Serial.print("FRI ");
break;
case 6:
lcd.print("SATURDAY ");
Serial.print("SAT ");
break;
case 7:
lcd.print("SUNDAY ");
Serial.print("SUN ");
break;
}
Serial.print(monthDay);
Serial.print("/");
Serial.print(month);
Serial.print("/");
Serial.print(year);
Serial.print(" ");
Serial.print(hour);
Serial.print(":");
Serial.print(minute);
Serial.print(":");
Serial.println(second);
lcd.setCursor(0,4);
lcd.print(monthDay);
lcd.print("/");
lcd.print(month);
lcd.print("/");
lcd.print(year);
lcd.setCursor(0,5);
if( second==0)
{
lcd.print(" ");
lcd.setCursor(0,5);
}
lcd.print(hour);
lcd.print(":");
lcd.print(minute);
lcd.print(":");
lcd.print(second);
}
system
4
PaulS, no sir, their is an error:
RTC.ino: In function 'void loop()':
RTC:28: error: 'class DateTime' has no member named 'weekday'
system
5
RTC:28: error: 'class DateTime' has no member named 'weekday'
My version of the Time library does, but it doesn't have a class called DateTime.
So, you need to post a link to the libraries you are using.
system
6
I got all the libraries from here sir, Arduino Playground - HomePage, do you have a better library?
system
7
I got mine from there, too. Did you follow the links in the Update: note, or the one in the next paragraph?
system
8
no sir, i didn't saw any update their i only downloaded the zip file. can you give me the link sir? thank you very much!
system
9
Is this code right?
//Arduino 1.0+ Only
//Arduino 1.0+ Only
#include "Wire.h"
#define DS1307_ADDRESS 0x68
char *weekName[13] = {
"Monday" ,"Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"
};
char *monthName[13] = {
"" ,"January", "February", "March", "April", "May", "June",
"July", "August", "September", "October", "November", "December"
};
void setup(){
Wire.begin();
Serial.begin(9600);
}
void loop(){
printDate();
delay(1000);
}
byte bcdToDec(byte val) {
// Convert binary coded decimal to normal decimal numbers
return ( (val/16*10) + (val%16) );
}
void printDate(){
// Reset the register pointer
Wire.beginTransmission(DS1307_ADDRESS);
byte zero = 0x00;
Wire.write(zero);
Wire.endTransmission();
Wire.requestFrom(DS1307_ADDRESS, 7);
int second = bcdToDec(Wire.read());
int minute = bcdToDec(Wire.read());
int hour = bcdToDec(Wire.read() & 0b111111); //24 hour time
int weekDay = bcdToDec(Wire.read()); //0-6 -> sunday - Saturday
int monthDay = bcdToDec(Wire.read());
int month = bcdToDec(Wire.read());
int year = bcdToDec(Wire.read());
//print the date EG 3/1/11 23:59:59
Serial.print(weekName[weekDay]);
Serial.print("/");
Serial.print(monthName[month]);
Serial.print("/");
Serial.print(monthDay);
Serial.print("/");
Serial.print(year);
Serial.print(" ");
Serial.print(hour);
Serial.print(":");
Serial.print(minute);
Serial.print(":");
Serial.println(second);
}
system
10
and how can make my hour to only 12 and put some AM and PM? thank you to the one that can give the answer..
tylernt
11
kengwapo:
and how can make my hour to only 12 and put some AM and PM? thank you to the one that can give the answer..
boolean PM = false;
if(hour > 12)
{
hour =- 12;
PM = true;
}
if(PM)
{ Serial.println(" PM"); }
else
{ Serial.println(" AM"); }