# 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:** 3\
**Page:** 1

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**Author:** ![yoheifujimitsu](https://avatars.discourse-cdn.com/v4/letter/y/7feea3/32.png) [@yoheifujimitsu](https://mangoh.discourse.group/u/yoheifujimitsu)\
**Post date:** [September 11, 2021, 6:45am UTC](https://mangoh.discourse.group/t/about-psm-wakeup-source/9653/1 "2021-09-11T06:45:11Z")

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I am trying to PSM.  
I configured below.

> AT!POWERWAKE?  
> !POWERWAKE:  
> PSM TIME: 14400, ACTIVE TIME: 20

And then, I tried PSM.

> AT!POWERMODE=2

After 14400 sec. system did not wake up.

Does anyone else has to set up?

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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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**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 12, 2021, 11:41am UTC](https://mangoh.discourse.group/t/about-psm-wakeup-source/9653/3 "2021-09-12T11:41:04Z")

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BTW, I also suggest you to try ULPM mode first:

> [@MangOH Yellow power optimization](https://mangoh.discourse.group/t/mangoh-yellow-power-optimization/4216/2):
>
> Hi Paul, One big way to reduce power is to put the HSIC interface into suspend mode. This can drop power by 60 ma. –\> echo 0 \> /sys/bus/usb/devices/usb1/authorized Also make sure wakelock is set in case USB cable is removed: –\> echo NO\_SLEEP \> /sys/power/wake\_lock Also, if you are ready to take a soldering iron, you can get some more improvements: a. Add R306 (0R), and check that EXT\_GPS\_LNA\_EN signal is set 0. Should be 4ma saving b. Savings over LEDs: –\> echo ‘AT!LEDTEST=0,1;!LEDTEST=…