# !PCVOLTLIMITS to set Under-Voltage Lockout (UVLO) threshold voltage

**URL:** <https://forum.sierrawireless.com/t/pcvoltlimits-to-set-under-voltage-lockout-uvlo-threshold-voltage/31099>\
**Category:** RC76\
**Created:** [November 20, 2023, 5:39pm UTC](https://forum.sierrawireless.com/t/pcvoltlimits-to-set-under-voltage-lockout-uvlo-threshold-voltage/31099 "2023-11-20T17:39:31Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![guillermo](https://avatars.discourse-cdn.com/v4/letter/g/eb8c5e/32.png) [@guillermo](https://forum.sierrawireless.com/u/guillermo)\
**Post date:** [November 20, 2023, 5:39pm UTC](https://forum.sierrawireless.com/t/pcvoltlimits-to-set-under-voltage-lockout-uvlo-threshold-voltage/31099/1 "2023-11-20T17:39:31Z")

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Any idea if !PCVOLTLIMITS can be used to set the Under-Voltage Lockout (UVLO) threshold voltage on the RC series? From what I read, the WP series technical documentation specifies the UVLO is programable but the RC series doesn’t comment on that, but, the !PCVOLTLIMITS is part of the AT command set for the RC.

I have been able to set the volt limits by using: `AT!PCVOLTLIMITS=4400,4300,3700,3300,3200` but I don’t know if it is having real effect on UVLO

2.8V is very low for a Li-Po battery and I’d like to increase it to 3.2V.

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**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\
**Post date:** [November 21, 2023, 1:01am UTC](https://forum.sierrawireless.com/t/pcvoltlimits-to-set-under-voltage-lockout-uvlo-threshold-voltage/31099/2 "2023-11-21T01:01:11Z")

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Have you done any testing on that?  
I think if this is stated in AT command user guide, it should be supported

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**Author:** ![guillermo](https://avatars.discourse-cdn.com/v4/letter/g/eb8c5e/32.png) [@guillermo](https://forum.sierrawireless.com/u/guillermo)\
**Post date:** [November 21, 2023, 12:10pm UTC](https://forum.sierrawireless.com/t/pcvoltlimits-to-set-under-voltage-lockout-uvlo-threshold-voltage/31099/3 "2023-11-21T12:10:54Z")

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Hey @jyijyi thanks for the answer. Testing it by myself would be the next logical step although I don’t have an immediate way to measure micro Amps. I was hoping this was known somehow but _underdocumented_.

> I think if this is stated in AT command user guide, it should be supported

That is also my guess, but it just speculation.