# Would it be possible to log the ac frequency using the emonTx?

**URL:** <https://community.openenergymonitor.org/t/would-it-be-possible-to-log-the-ac-frequency-using-the-emontx/17167>\
**Category:** emonTx\
**Created:** [10 March 2021 19:43 UTC](https://community.openenergymonitor.org/t/would-it-be-possible-to-log-the-ac-frequency-using-the-emontx/17167 "2021-03-10T19:43:10Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![Robert.Wall](https://community.openenergymonitor.org/user_avatar/community.openenergymonitor.org/robert.wall/32/38246_2.png) [@Robert.Wall](https://community.openenergymonitor.org/u/Robert.Wall)\
**Post date:** [10 March 2021 19:54 UTC](https://community.openenergymonitor.org/t/would-it-be-possible-to-log-the-ac-frequency-using-the-emontx/17167/2 "2021-03-10T19:54:44Z")

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Certainly.

EmonLibCM makes it available, it simply isn’t normally sent with the rest of the data. Look at the documentation for emonLibCM:

> [@EmonLibCM - Version 2.2.2](https://community.openenergymonitor.org/t/emonlibcm-version-2-04/9241):
>
> EmonLibCM is a Continuous Monitoring alternative to EmonLib. Whereas emonLib repeats, every 5 or 10 s, a sequence of voltage and current measurements in each of the input channels for a short period, normally 200 ms, and then reports the measurements back to the sketch for onwards transmission to (for example) emonCMS; emonLibCM continuously measures in the background the voltage and all the current input channels in turn, calculates a true average quantity for each and then informs the sketch t…

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