Set time via publish message

Cloud
1

Despite revisiting this issue time and time again and receiving some fantastic help from members I’ve never managed to get my Particle Core to maintain accurate time. It’s off by a minutes and obviously the drift only gets worse rather than better!

Just wondering - could anyone point me at a code snippet where I can tell my Core with a Particle Publish:
“right, it’s 22:00 NOW” !!
the Core then sets the time to 22:00.
I’m aware that there will be a couple of seconds inaccuracy with this method (at best) but it’s a lot better than the couple of minutes issue I have at the moment!

thank you!!

2

There are a couple of libraries available to sync time via NTP. If you need accurate time that’s the best route rather than using a cloud function or other means. You’ll get way more accurate time.

1 Like
3

Using Time.setTime() could work.

// Expect data to be unix timestamp
void timeHandler(const char *event, const char *data)
{
int timeFromData = atoi(data);
Time.setTime(timeFromData);
}

// In setup()
Particle.subscribe("setTime", timeHandler, MY_DEVICES);

Alternatively, you could make use of Particle.syncTime() and call it routinely. This would be a more straightforward remedy and you wouldn’t need to manually sync the time with a publish.

1 Like
4

Thanks, I've tried this, but it doesn't seem to work. I've had help from all sorts of forum superstars over the years but it's never worked. It might work on a Photon but I've not got it to work on a Core. It works once, but then never again.

Thanks for the code snippet, that sounds like it might do the job! I just send a unix timestamp with topic "setTime" ?

1 Like
5

Yup, that should do it.

6

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