# \[Hilo\] How host be signaled when Hilo3G wake up from sleeep?

**URL:** <https://forum.sierrawireless.com/t/hilo-how-host-be-signaled-when-hilo3g-wake-up-from-sleeep/6569>\
**Category:** HL Series FAQ\
**Created:** [July 23, 2013, 6:23am UTC](https://forum.sierrawireless.com/t/hilo-how-host-be-signaled-when-hilo3g-wake-up-from-sleeep/6569 "2013-07-23T06:23:26Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![FAQ\_Poster](https://avatars.discourse-cdn.com/v4/letter/f/f9ae1b/32.png) [@FAQ\_Poster](https://forum.sierrawireless.com/u/FAQ_Poster)\
**Post date:** [July 23, 2013, 6:23am UTC](https://forum.sierrawireless.com/t/hilo-how-host-be-signaled-when-hilo3g-wake-up-from-sleeep/6569/1 "2013-07-23T06:23:26Z")

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[Hilo] How is the host signaled when Hilo3G modules wake up from sleep?

Answer: During sleep (STANDBY MODE, Current \< 1.7 mA):  
When incoming a data/voice call:

- Then RI signal will be changed to low level (RI=1, active) if you’ve already set \<AT+KRIC=3,1\>
- You’ll get URC of “RING” from UART or USB
- Module will be waked up, you can see CTS be changed to low level (CTS=1, active)

When incoming an SMS:

- There’s a second pulse on RI signal If you’ve already set \<AT+KRIC=3,1\>
- You’ll get URC like \<+CMTI: “ME”,5\> if you’ve already set \<AT+CNMI=2,2,2,1,0\>
- Module will be waked up, you can see CTS be changed to low level (CTS=1, active)