# How to read RV50 voltage

**URL:** <https://forum.sierrawireless.com/t/how-to-read-rv50-voltage/9454>\
**Category:** AirLink routers\
**Created:** [September 1, 2017, 12:13pm UTC](https://forum.sierrawireless.com/t/how-to-read-rv50-voltage/9454 "2017-09-01T12:13:27Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![cparrish60](https://avatars.discourse-cdn.com/v4/letter/c/5e9695/32.png) [@cparrish60](https://forum.sierrawireless.com/u/cparrish60)\
**Post date:** [September 1, 2017, 12:13pm UTC](https://forum.sierrawireless.com/t/how-to-read-rv50-voltage/9454/1 "2017-09-01T12:13:27Z")

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How do I read the RV50 input voltage remotely. Is there an API or register address?

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**Author:** ![gtsang](https://avatars.discourse-cdn.com/v4/letter/g/97f17d/32.png) [@gtsang](https://forum.sierrawireless.com/u/gtsang)\
**Post date:** [September 5, 2017, 10:25pm UTC](https://forum.sierrawireless.com/t/how-to-read-rv50-voltage/9454/2 "2017-09-05T22:25:28Z")

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Hi There,

The RV Operating Voltage can be found on page 21 of the Hardware User Guide: “Input Voltage is 7-36V” The link for the guide can be found below.  
[source.sierrawireless.com/~/med … de\_r3.ashx](https://source.sierrawireless.com/~/media/support_downloads/airlink/docs/user_guides/hardware%20guide/4117313_airlink%20rv50%20series%20hardware%20user%20guide_r3.ashx)

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**Author:** ![cparrish60](https://avatars.discourse-cdn.com/v4/letter/c/5e9695/32.png) [@cparrish60](https://forum.sierrawireless.com/u/cparrish60)\
**Post date:** [October 29, 2017, 9:09pm UTC](https://forum.sierrawireless.com/t/how-to-read-rv50-voltage/9454/3 "2017-10-29T21:09:24Z")

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Thanks,

I know how to read it through the ACEManager. I need to be able to log it periodically from my software application.

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**Author:** ![bseishen](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/bseishen/32/812_2.png) [@bseishen](https://forum.sierrawireless.com/u/bseishen)\
**Post date:** [November 7, 2017, 4:37pm UTC](https://forum.sierrawireless.com/t/how-to-read-rv50-voltage/9454/4 "2017-11-07T16:37:22Z")

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Are you writing a lua script for the RV50? If so, using the lua devicetree module, call devicetree.get(“system.io.powerin”). This will return a string of the voltage.