# How to sync WP8548 module datetime with external RTC

**URL:** <https://mangoh.discourse.group/t/how-to-sync-wp8548-module-datetime-with-external-rtc/589>\
**Category:** mangOH Green\
**Created:** [June 21, 2017, 9:06am UTC](https://mangoh.discourse.group/t/how-to-sync-wp8548-module-datetime-with-external-rtc/589 "2017-06-21T09:06:17Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![umesh-gp](https://avatars.discourse-cdn.com/v4/letter/u/90db22/32.png) [@umesh-gp](https://mangoh.discourse.group/u/umesh-gp)\
**Post date:** [June 21, 2017, 9:06am UTC](https://mangoh.discourse.group/t/how-to-sync-wp8548-module-datetime-with-external-rtc/589/1 "2017-06-21T09:06:17Z")

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I want to keep sync my module’s RTC with external RTC.  
how to do it ?  
can anyone help me ?

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**Author:** ![pankaj](https://avatars.discourse-cdn.com/v4/letter/p/a9adbd/32.png) [@pankaj](https://mangoh.discourse.group/u/pankaj)\
**Post date:** [June 26, 2017, 5:33am UTC](https://mangoh.discourse.group/t/how-to-sync-wp8548-module-datetime-with-external-rtc/589/2 "2017-06-26T05:33:26Z")

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Hi Umesh,

Kindly refer the below link:

[http://legato.io/legato-docs/latest/c\_clock.html](http://legato.io/legato-docs/latest/c_clock.html)

[http://legato.io/legato-docs/latest/howToSetUserTimebase.html](http://legato.io/legato-docs/latest/howToSetUserTimebase.html)

Thanks & Regards,

Pankaj Sant