Teensy 4.1 - RTC and NTP Time

[chrissaich]

I want to connect to an NTP server on boot up, read time and use it to set the time on the T4.1 RTC. I will do this once an hour maybe, depending on the drift I get.

I then want to call the RTC typically every few seconds for data logging time stamps.

I have currently have code running which always calls NTP, but I'd prefer a local call to RTC for speed and if there's an internet outage, I'm stuck.

So if I

setSyncProvider(getTeensy3Time)

will that mean that

now()

will get time from the RTC? That's what I want.

And how do I set the T4.1RTC to NTP time? I would expect to

 setTime(t);

but how do I obtain 't', because now() will try and get time from the T4.1RTC

Any help appreciated as always, thanks

 

[thebigg]

t = Teensy3Clock.get();