Introduction: Clock ,RTC DS1307 SET AND SHOW THE TIME ON YOUR LCD.
Based on my first Instructable.
Based on WWC SKETCH
Add Rtc(realtimeclock) to your Instructable .
Items
1 Arduino
1 Usb conector wire
1 RTC DS1307
1 Wires
1 Device to upload scetch.
1 time / DS1307RTC libraries http://playground.arduino.cc/Code/time
Step 1:
conect rtc to arduino.
conect SDA to Arduino A4.
conect SCL to Arduino A5.
conect vcc to +5v
conect gnd to gnd
Step 2: Conect Lcd
LCD to Arduino
1 GND
2 +
3 center of potentiometer
4 pin 12 Arduino.
5 GND
6 Pin 11 Arduino
11 Pin 5 Arduino
12 Pin 4 Arduino
13 Pin 3 Arduino
14 Pin 2 Arduino
15 +
16 Gnd
Step 3: The Set Rtc Sketch From Member WWC. Don't Use This Example Where U Change the Time.
the serial input didn 't work for me so i ad the time to the sketch.
dont use this one . only for EXAMPLE where u have to enter the time .
// This set of codes is allows input of data
void setTime() {
Serial.print("Please enter the current year, 00-99. - ");
year = 13;
Serial.println(year);
Serial.print("Please enter the current month, 1-12. - ");
month = 9;
Serial.println(months[month-1]);
Serial.print("Please enter the current day of the month, 1-31. - ");
monthday = 20;
Serial.println(monthday);
Serial.println("Please enter the current day of the week, 1-7.");
Serial.print("1 Sun | 2 Mon | 3 Tues | 4 Weds | 5 Thu | 6 Fri | 7 Sat - ");
weekday = 6;
Serial.println(days[weekday-1]);
Serial.print("Please enter the current hour in 24hr format, 0-23. - ");
hour = 13;
Serial.println(hour);
Serial.print("Please enter the current minute, 0-59. - ");
minute = 51;
Serial.println(minute);
second = 15;
Serial.println("The data has been entered.");
Step 4: The Set Rtc Sketch From Member WWC. Take This.
you have to enter your time ,upload and then open serial and hit y and send.
//////////////////////////////////////////
// RTC data and time setter //
// //
// This sample program allows the user //
// to set the date and time of an RTC //
// using I2C. //
// //
// Codes by: //
// eGizmo Mechatronix Central //
// Taft, Manila, Philippines //
// http://www.egizmo.com //
// April 15, 2013 //
///////////////////////////////////////////
#include <Wire.h>
const int DS1307 = 0x68; // Address of DS1307 see data sheets
const char* days[] =
{"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};
const char* months[] =
{"January", "February", "March", "April", "May", "June", "July", "August","September", "October", "November", "December"};
// Initializes all values:
byte second = 0;
byte minute = 0;
byte hour = 0;
byte weekday = 0;
byte monthday = 0;
byte month = 0;
byte year = 0;
void setup() {
Wire.begin();
Serial.begin(9600);
delay(2000); // This delay allows the MCU to read the current date and time.
Serial.print("The current date and time is: ");
printTime();
Serial.println("Please change to newline ending the settings on the lower right of the Serial Monitor");
Serial.println("Would you like to set the date and time now? Y/N");
while (!Serial.available()) delay(10);
if (Serial.read() == 'y' || Serial.read() == 'Y')
// This set of functions allows the user to change the date and time
{
Serial.read();
setTime();
Serial.print("The current date and time is now: ");
printTime();
}
Serial.println("Thank you.");
}
// Continuous function for converting bytes to decimals and vice versa
void loop() {
}
byte decToBcd(byte val) {
return ((val/10*16) + (val%10));
}
byte bcdToDec(byte val) {
return ((val/16*10) + (val%16));
}
// This set of codes is allows input of data
void setTime() {
Serial.print("Please enter the current year, 00-99. - ");
year = 13;
Serial.println(year);
Serial.print("Please enter the current month, 1-12. - ");
month = 9;
Serial.println(months[month-1]);
Serial.print("Please enter the current day of the month, 1-31. - ");
monthday = 20;
Serial.println(monthday);
Serial.println("Please enter the current day of the week, 1-7.");
Serial.print("1 Sun | 2 Mon | 3 Tues | 4 Weds | 5 Thu | 6 Fri | 7 Sat - ");
weekday = 6;
Serial.println(days[weekday-1]);
Serial.print("Please enter the current hour in 24hr format, 0-23. - ");
hour = 13;
Serial.println(hour);
Serial.print("Please enter the current minute, 0-59. - ");
minute = 51;
Serial.println(minute);
second = 15;
Serial.println("The data has been entered.");
// The following codes transmits the data to the RTC
Wire.beginTransmission(DS1307);
Wire.write(byte(0));
Wire.write(decToBcd(second));
Wire.write(decToBcd(minute));
Wire.write(decToBcd(hour));
Wire.write(decToBcd(weekday));
Wire.write(decToBcd(monthday));
Wire.write(decToBcd(month));
Wire.write(decToBcd(year));
Wire.write(byte(0));
Wire.endTransmission();
// Ends transmission of data
}
byte readByte() {
while (!Serial.available()) delay(10);
byte reading = 0;
byte incomingByte = Serial.read();
while (incomingByte != '\n') {
if (incomingByte >= '0' && incomingByte <= '9')
reading = reading * 10 + (incomingByte - '0');
else;
incomingByte = Serial.read();
}
Serial.flush();
return reading;
}
void printTime() {
char buffer[3];
const char* AMPM = 0;
readTime();
Serial.print(days[weekday-1]);
Serial.print(" ");
Serial.print(months[month-1]);
Serial.print(" ");
Serial.print(monthday);
Serial.print(", 20");
Serial.print(year);
Serial.print(" ");
if (hour > 12) {
hour -= 12;
AMPM = " PM";
}
else AMPM = " AM";
Serial.print(hour);
Serial.print(":");
sprintf(buffer, "%02d", minute);
Serial.print(buffer);
Serial.println(AMPM);
}
void readTime() {
Wire.beginTransmission(DS1307);
Wire.write(byte(0));
Wire.endTransmission();
Wire.requestFrom(DS1307, 7);
second = bcdToDec(Wire.read());
minute = bcdToDec(Wire.read());
hour = bcdToDec(Wire.read());
weekday = bcdToDec(Wire.read());
monthday = bcdToDec(Wire.read());
month = bcdToDec(Wire.read());
year = bcdToDec(Wire.read());
}
Step 5: Now Upload This to See the Time on Your Lcd.
/*
* TimeRTC.pde
* example code illustrating Time library with Real Time Clock.
*
*/
#include <Time.h>
#include <Wire.h>
#include <DS1307RTC.h> // a basic DS1307 library that returns time as a time_t
#include <LiquidCrystal.h>
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
void setup() {
lcd.begin(16, 2);
Serial.begin(9600);
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");
}
void loop()
{
digitalClockDisplay();
delay(1000);
}
void digitalClockDisplay(){
// digital clock display of the time
Serial.print(hour());
printDigits(minute());
printDigits(second());
Serial.print(" ");
Serial.print(day());
Serial.print(" ");
Serial.print(month());
Serial.print(" ");
Serial.print(year());
Serial.println();
lcd.setCursor(2, 0); // Set LCD cursor position (column, row)
lcd.print(hour());
lcd.print(":");
lcd.print (minute());
lcd.print(" ");
lcd.print(second());
lcd.print(" ");
lcd.print("Uhr");
lcd.setCursor(3, 1); // Set LCD cursor position (column,row)
lcd.print(day());
lcd.print(".");
lcd.print(month());
lcd.print(".");
lcd.print(year());
// Print text to LCD
// Delay to read text
// Clear the display
}
void 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);
}
