Hi guys. I am building a digital Guage pressure meter for a design project at college.
My sensor and display is working well, I am also logging data to my PC.
Which is where my problem comes in, I am using the DS1307 RTC and I cannot set the time.
I have all the libaries from arduino for time. I just dont know how to set the time.
I really need some help to finally complete my design.
The code below is the code i am using from the library. I just dont know how to alter the code to set the time. I've tried so many ways and is really stressed out. Please help me. Thanks
/*
- TimeRTCSet.pde
- example code illustrating Time library with Real Time Clock.
- RTC clock is set in response to serial port time message
- A Processing example sketch to set the time is inclided in the download
*/
#include <Time.h>
#include <Wire.h>
#include <DS1307RTC.h> // a basic DS1307 library that returns time as a time_t
void setup() {
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()
{
if(Serial.available())
{
time_t t = processSyncMessage();
if(t >0)
{
RTC.set(t); // set the RTC and the system time to the received value
setTime(t);
}
}
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();
}
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);
}
/* code to process time sync messages from the serial port */
#define TIME_MSG_LEN 11 // time sync to PC is HEADER followed by unix time_t as ten ascii digits
#define TIME_HEADER 'T' // Header tag for serial time sync message
time_t processSyncMessage() {
// return the time if a valid sync message is received on the serial port.
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 <= '9'){
pctime = (10 * pctime) + (c - '0') ; // convert digits to a number
}
}
return pctime;
}
}
return 0;
}