# About PSM wakeup source

**URL:** <https://mangoh.discourse.group/t/about-psm-wakeup-source/9653>\
**Category:** Uncategorized\
**Created:** [September 11, 2021, 6:45am UTC](https://mangoh.discourse.group/t/about-psm-wakeup-source/9653 "2021-09-11T06:45:11Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![jyijyi](https://sea2.discourse-cdn.com/flex016/user_avatar/mangoh.discourse.group/jyijyi/32/997_2.png) [@jyijyi](https://mangoh.discourse.group/u/jyijyi)\
**Post date:** [September 11, 2021, 1:16pm UTC](https://mangoh.discourse.group/t/about-psm-wakeup-source/9653/2 "2021-09-11T13:16:52Z")

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Did you set the timeout value by +cpsms ?

Did you check if there is any reply from network from +cereg unsolicited message? According to AT command guide, if psm timer is not accepted by network, PSM is disabled and neither PSM nor ULPM will be performed.

Btw, I remember i also need to run this wakeup\_app.rar to let the module stay awake while removing usb cable.

> [@Unable to ssh on eth0 (RJ45)](https://mangoh.discourse.group/t/unable-to-ssh-on-eth0-rj45/3891/2):
>
> I guess the module has gone to sleep mode after you unplugged the USB cable. Please run the app to make the module still awake after USB disconnect. [wakeup\_app.rar](https://mangoh.discourse.group/uploads/short-url/4uATXQ5rKtkvAGGXwwRNVeDQlYN.rar) (199.2 KB)

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