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ropg / ezTime

ezTime — pronounced "Easy Time" — is a very easy to use Arduino time and date library that provides NTP network time lookups, extensive timezone support, formatted time and date strings, user events, millisecond precision and more.
MIT License
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NTP update time violates NTP.org guidelines #141

Closed MikeyMoMo closed 2 years ago

MikeyMoMo commented 2 years ago

You should, by default, only fetch time from NTP.org once per day. Their guidelines request that and be sure to avoid on the hour and half hour calls and surely avoid midnight calls. I would suggest using 86578 (or something quite similar) as that is slightly over a day and will cycle through the day, slowly, not sitting on one of the hotspot time for NTP.org.

This line: #define NTP_INTERVAL 86578 // default update interval in seconds

BigBird0000 commented 2 years ago

Perhaps adding an RTC (like the DS1307 or DS3231) option, and use the RTC instead of millis(), continue to use millis if no RTC, or if RTC is invalid. Then maybe depending on the accuracy of the RTC, maybe get NTP time once every couple of days.

MikeyMoMo commented 2 years ago

That is not the point. I use NTP time, not the crappy RTC modules. The library default for queering NTP is too short and needs to be changed, either by the author or by the user.

On Mon, Mar 7, 2022, 8:39 AM BigBird0000 @.***> wrote:

Perhaps adding an RTC (like the DS1307 or DS3231) option, and use the RTC instead of millis(), continue to use millis if no RTC, or if RTC is invalid. Then maybe depending on the accuracy of the RTC, maybe get NTP time once every couple of days.

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