# How to Wake Up from deep sleep

**URL:** <https://mangoh.discourse.group/t/how-to-wake-up-from-deep-sleep/4879>\
**Category:** mangOH Red\
**Created:** [July 20, 2020, 12:57pm UTC](https://mangoh.discourse.group/t/how-to-wake-up-from-deep-sleep/4879 "2020-07-20T12:57:49Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![stedin](https://avatars.discourse-cdn.com/v4/letter/s/a88e4f/32.png) [@stedin](https://mangoh.discourse.group/u/stedin)\
**Post date:** [July 20, 2020, 12:57pm UTC](https://mangoh.discourse.group/t/how-to-wake-up-from-deep-sleep/4879/1 "2020-07-20T12:57:49Z")

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Hello,  
I am playing with MangOH RED, with HL7800.  
FW: SV:08

I am able to go in deep sleep mode (AT+KSLEEP=0,2,0):  
-PSM rock bottom around 36µA (I guess deep sleep)  
-eDRX rock bottom 113µA (I guess light sleep)

If I open the COM port , it starts to accept input only at beginning and end of a Tracking Area Update procedure (so latency could be very long).  
Is there any other way to wake up the UE when in Deep Sleep mode, and send data (+KUDPSND, +KTCPSND)?

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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:** [July 21, 2020, 4:10am UTC](https://mangoh.discourse.group/t/how-to-wake-up-from-deep-sleep/4879/2 "2020-07-21T04:10:05Z")

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how about using the WAKE\_UP pin?

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**Author:** ![stedin](https://avatars.discourse-cdn.com/v4/letter/s/a88e4f/32.png) [@stedin](https://mangoh.discourse.group/u/stedin)\
**Post date:** [July 21, 2020, 10:24am UTC](https://mangoh.discourse.group/t/how-to-wake-up-from-deep-sleep/4879/3 "2020-07-21T10:24:33Z")

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Thank you,  
I would prefer to avoid to use extra HW to handle additional signals.  
Pls, do you confirm it is impossible using only UARTs?

thanks in advance

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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:** [July 21, 2020, 11:00am UTC](https://mangoh.discourse.group/t/how-to-wake-up-from-deep-sleep/4879/4 "2020-07-21T11:00:49Z")

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Suggest you download the AirPrime\_HL7800\_Low\_Power\_Modes\_Application\_Note\_Rev2\_0.pdf.

I believe Sms and ip reception will also wake the module up.