Hi all,
I'm trying to print current time as serial data, but I'm wondering why the Time Serial example is not working.
When I ran the code, LED 13 is off and serial data is just a line of "Waiting for sync message".
I got the code from GitHub - PaulStoffregen/Time: Time library for Arduino
(directed from Arduino Playground - HomePage)
Below is the code
/*
* TimeSerial.pde
* example code illustrating Time library set through serial port messages.
*
* Messages consist of the letter T followed by ten digit time (as seconds since Jan 1 1970)
* you can send the text on the next line using Serial Monitor to set the clock to noon Jan 1 2013
T1357041600
*
* A Processing example sketch to automatically send the messages is included in the download
* On Linux, you can use "date +T%s\n > /dev/ttyACM0" (UTC time zone)
*/
#include <Time.h>
#define TIME_HEADER "T" // Header tag for serial time sync message
#define TIME_REQUEST 7 // ASCII bell character requests a time sync message
void setup() {
Serial.begin(9600);
while (!Serial) ; // Needed for Leonardo only
pinMode(13, OUTPUT);
setSyncProvider( requestSync); //set function to call when sync required
Serial.println("Waiting for sync message");
}
void loop(){
if (Serial.available()) {
processSyncMessage();
}
if (timeStatus()!= timeNotSet) {
digitalClockDisplay();
}
if (timeStatus() == timeSet) {
digitalWrite(13, HIGH); // LED on if synced
} else {
digitalWrite(13, LOW); // LED off if needs refresh
}
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);
}
void processSyncMessage() {
unsigned long pctime;
const unsigned long DEFAULT_TIME = 1357041600; // Jan 1 2013
if(Serial.find(TIME_HEADER)) {
pctime = Serial.parseInt();
if( pctime >= DEFAULT_TIME) { // check the integer is a valid time (greater than Jan 1 2013)
setTime(pctime); // Sync Arduino clock to the time received on the serial port
}
}
}
time_t requestSync()
{
Serial.write(TIME_REQUEST);
return 0; // the time will be sent later in response to serial mesg
}