# Simple system voltage query

**URL:** <https://forum.sierrawireless.com/t/simple-system-voltage-query/32435>\
**Category:** AirLink Routers\
**Created:** [May 31, 2024, 4:42pm UTC](https://forum.sierrawireless.com/t/simple-system-voltage-query/32435 "2024-05-31T16:42:38Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![drew.lindow](https://avatars.discourse-cdn.com/v4/letter/d/7bcc69/32.png) [@drew.lindow](https://forum.sierrawireless.com/u/drew.lindow)\
**Post date:** [May 31, 2024, 4:42pm UTC](https://forum.sierrawireless.com/t/simple-system-voltage-query/32435/1 "2024-05-31T16:42:38Z")

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I want to write a simple python script that will query the system voltage from a list of RV50X routers over the internet. What is the simplest interface that could be leveraged for this?

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**Author:** ![jerdung](https://avatars.discourse-cdn.com/v4/letter/j/82dd89/32.png) [@jerdung](https://forum.sierrawireless.com/u/jerdung)\
**Post date:** [June 3, 2024, 8:47am UTC](https://forum.sierrawireless.com/t/simple-system-voltage-query/32435/2 "2024-06-03T08:47:20Z")

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Hi @drew.lindow,

If you want to develop an app, please refer to the ALEOS Application Framework at the following link: [https://source.sierrawireless.com/resources/airlink/aleos\_af/aleos\_af\_home/#sthash.4WnNBSl4.dpbs](https://source.sierrawireless.com/resources/airlink/aleos_af/aleos_af_home/#sthash.4WnNBSl4.dpbs)

Thanks,

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**Author:** ![drew.lindow](https://avatars.discourse-cdn.com/v4/letter/d/7bcc69/32.png) [@drew.lindow](https://forum.sierrawireless.com/u/drew.lindow)\
**Post date:** [June 3, 2024, 4:07pm UTC](https://forum.sierrawireless.com/t/simple-system-voltage-query/32435/3 "2024-06-03T16:07:34Z")

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Deploying a complete app is more complexity than its worth just to get the modem’s voltage. Is it possible to query the voltage using existing ALEOS or AirVantage functionality?

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**Author:** ![jerdung](https://avatars.discourse-cdn.com/v4/letter/j/82dd89/32.png) [@jerdung](https://forum.sierrawireless.com/u/jerdung)\
**Post date:** [June 4, 2024, 9:17am UTC](https://forum.sierrawireless.com/t/simple-system-voltage-query/32435/4 "2024-06-04T09:17:03Z")

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Hi @drew.lindow,

You can do the following:

1. Set the USB Device Mode to USB Serial
2. Check if the port appears in Device Manager, then use Putty or Tera Term to connect to the port  
 ![at_port](https://us1.discourse-cdn.com/flex025/uploads/sierrawireless/original/2X/4/4949fdb184d3fcb3180fdf56e8ca3596710d1f50.png)
3. Send the command “AT\*POWERIN?” to query the voltage

You can refer to the details about USB Device Mode and the query voltage command on pages 132 and 535 of the AirLink RV50X Software Configuration Guide at the following link: [https://source.sierrawireless.com/resources/airlink/software\_reference\_docs/airlink-rv-series---configuration-guide/#sthash.o1wy3J0s.dpbs](https://source.sierrawireless.com/resources/airlink/software_reference_docs/airlink-rv-series---configuration-guide/#sthash.o1wy3J0s.dpbs)

Thanks,

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<div class="post-metadata">

**Author:** ![drew.lindow](https://avatars.discourse-cdn.com/v4/letter/d/7bcc69/32.png) [@drew.lindow](https://forum.sierrawireless.com/u/drew.lindow)\
**Post date:** [June 5, 2024, 9:04pm UTC](https://forum.sierrawireless.com/t/simple-system-voltage-query/32435/5 "2024-06-05T21:04:57Z")

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Thanks for your help @jerdung,  
Is it possible to send AT commands over the internet? Maybe SSH, telnet, a REST API, etc?

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**Author:** ![jerdung](https://avatars.discourse-cdn.com/v4/letter/j/82dd89/32.png) [@jerdung](https://forum.sierrawireless.com/u/jerdung)\
**Post date:** [June 11, 2024, 4:35am UTC](https://forum.sierrawireless.com/t/simple-system-voltage-query/32435/6 "2024-06-11T04:35:21Z")

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Hi @drew.lindow,

Please refer to section AT (Telnet/SSH) on page 244 of the ALEOS 4.17.1 Software Configuration User Guide for AirLink RV50X — the document I mentioned above — for using the Telnet or SSH protocol to connect to any AirLink router and send AT commands.

Thanks,