ESP8266 Community Forum

- Wed Jun 08, 2016 1:53 pm #48800

With Timlib by PaulStoffregen, sync is done every 5 min and can be adjusted.
https://github.com/PaulStoffregen/Time/ ... 66WiFi.ino
https://github.com/PaulStoffregen/Time/ ... #L312-L321

Not necessary. The SDK code contains an NTP client. It's just that you need to retrigger it every now and then, not a big deal.

- Wed Jun 08, 2016 4:01 pm #48810 @TO:
if your ESP was only ~4 min wrong for the year, you were lucky. My esp-01 was about 4min wrong per day!
I also tried to correct it in software but had to realize that the diffrence was much depending on ambient temperature. And this simple method gets very complex if your battery powered IoT gadget uses deepsleep.

So yes, one could save on the rtc but only under very specific circumstances...

- Thu Jun 09, 2016 2:43 am #48853

With Timlib by PaulStoffregen, sync is done every 5 min and can be adjusted.
https://github.com/PaulStoffregen/Time/ ... 66WiFi.ino
https://github.com/PaulStoffregen/Time/ ... #L312-L321

Not necessary. The SDK code contains an NTP client. It's just that you need to retrigger it every now and then, not a big deal.

Any doc somewhere on these SDK time APIs? Or pointers to or examples of using them?

TIA

- Thu Jun 09, 2016 10:24 am #48861 It's explained in the SDK documentation. If you don't have read that, you're missing out a lot.