I’m currently working with the HL7812 module dev kit 5303247 rev 2 and trying to get Power Saving Mode (PSM) working properly, but I’ve been running into some weird stuff. Modem fw: HL7812.5.5.17.0-24.03.0.FreeRTOS.w10 Here is the overall hl7812 modem current consumption: [image] As soon as I…

not sure if this is related, but is there any improvement if you set “AT+KSIMDET=0” ?

what functionality have you set for GPIO6? GPIO? or low power monitoring functionality?

Yes it is low power monitoring AT+KHWIOCFG=3,1,6 I also tested it after disabling it; In both cases, whether gpio6 is enabled / disabled, gpio6 the result is the same.

how about setting it to be GPIO as high or low state?

AT+KGPIOCFG=6,0,2 AT+KGPIO=6,1 [image] I tried these commands as it suggested here: but both return cme error. doesnt allow me to do it. cme error. But i ran these commands after disabling low power mode monitoring functionality. Then it worked. Both commands return ok. but still the same res…

i don’t see such problem: AT+KGPIOCFG=6,0,2 OK AT+KGPIO=6,1 OK AT+KHWIOCFG? +KHWIOCFG: 0,0 +KHWIOCFG: 1,0 +KHWIOCFG: 2,0 +KHWIOCFG: 3,0,6 +KHWIOCFG: 4,0,8 +KHWIOCFG: 5,0 +KHWIOCFG: 6,0 +KHWIOCFG: 7,0 +KHWIOCFG: 8,1 OK ati3 HL7812.5.5.14.0 OK

Yeah, there’s no problem with those AT commands as long as I run AT+KGPIOCFG and AT+KGPIO either before enabling the low power monitoring feature with AT+KHWIOCFG=3,1,6, or after disabling it with AT+KHWIOCFG=3,0,6. But I’m not sure I follow what you’re getting at with this gpio6 status, especially…

[image] jyijyi: not sure if this is related, but is there any improvement if you set “AT+KSIMDET=0” ? Excellent, Using that AT command pretty much fixed the PSM issue, but I’m still seeing GPIO6 toggling just before the modem enters PSM, as shown in the screenshot. But how, why …

i think you need to contact Sierra FAE to understand this issue ALT1250-5221.

We’ve made some progress on this issue. After setting AT+KSIMDET=0, the device is now able to enter sleep modes correctly, in my case, it successfully goes into hibernate. However, I’m now running into a new problem: the device never wakes up from hibernate after I assert the wake-up pin. It also d…

Unexpected GPIO6 and fast shotdown pin Behavior When Trying to Enter PSM on HL7812 – Not Matching Docs

IoT Modules Legacy HL Series

jyijyi May 30, 2025, 1:26pm 12

Yes, better open a new discussion thread

No URCs or Network Recovery After Wake-Up From Hibernate (CEREG:4 Stuck)

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Unexpected GPIO6 and fast shotdown pin Behavior When Trying to Enter PSM on HL7812 – Not Matching Docs

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