# Hl6528 auto

**URL:** <https://forum.sierrawireless.com/t/hl6528-auto/25574>\
**Category:** Legacy HL Series\
**Created:** [November 23, 2021, 6:09am UTC](https://forum.sierrawireless.com/t/hl6528-auto/25574 "2021-11-23T06:09:11Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![kalinin.vldmr](https://avatars.discourse-cdn.com/v4/letter/k/b19c9b/32.png) [@kalinin.vldmr](https://forum.sierrawireless.com/u/kalinin.vldmr)\
**Post date:** [November 23, 2021, 6:09am UTC](https://forum.sierrawireless.com/t/hl6528-auto/25574/1 "2021-11-23T06:09:11Z")

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Hello. Previously we used different HL6528 modems in our devices (except RD and automotive grade).  
Now we tried to apply HL6528 Automotive grade (HL6528-G2.8V AUTO 1102316).  
These modems don’t work in our devices -there are no signals on the contacts of the SIM card (we used single SIM1). What is the difference between automotive and other modems? Where can I find “AirPrime HL6528x (Automotive) Product Technical Specification Reference Number: 4116503”?  
Thanks in advance for the answers.

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**Author:** ![LemonGreen](https://avatars.discourse-cdn.com/v4/letter/l/82dd89/32.png) [@LemonGreen](https://forum.sierrawireless.com/u/LemonGreen)\
**Post date:** [November 23, 2021, 8:33am UTC](https://forum.sierrawireless.com/t/hl6528-auto/25574/2 "2021-11-23T08:33:39Z")

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Hi @kalinin.vldmr ,  
Welcome to Sierra community!  
I cannot find the document in Sierra source because the module is EOL. To debug the problem, please provide the output of the following commands.  
AT+CPIN?  
AT+CSQ  
AT+CREG=2  
AT+CCID  
AT+CIMI  
AT\*PSNTRG?  
AT+KBND?  
AT+COPS?  
AT+COPS=?  
AT+CREG?  
AT+CGDCONT?  
AT+CGACT?  
AT+CGATT?

Thanks

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**Author:** ![kalinin.vldmr](https://avatars.discourse-cdn.com/v4/letter/k/b19c9b/32.png) [@kalinin.vldmr](https://forum.sierrawireless.com/u/kalinin.vldmr)\
**Post date:** [November 23, 2021, 10:20am UTC](https://forum.sierrawireless.com/t/hl6528-auto/25574/3 "2021-11-23T10:20:13Z")

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AT+CPIN? ERROR  
AT+CSQ +CSQ: 30,99 OK  
AT+CREG=2 OK  
AT+CCID Not responce. Modem hung up  
AT+CIMI ERROR  
AT\*PSNTRG? ERROR  
AT+KBND? +KBND: 02 OK  
AT+COPS? +COPS: 0 OK  
AT+COPS=? Not responce. Modem hung up  
AT+CREG? +CREG: 2,0 OK  
AT+CGDCONT? ERROR  
AT+CGACT? ERROR  
AT+CGATT? ERROR

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<div class="post-metadata">

**Author:** ![kalinin.vldmr](https://avatars.discourse-cdn.com/v4/letter/k/b19c9b/32.png) [@kalinin.vldmr](https://forum.sierrawireless.com/u/kalinin.vldmr)\
**Post date:** [November 23, 2021, 1:02pm UTC](https://forum.sierrawireless.com/t/hl6528-auto/25574/4 "2021-11-23T13:02:18Z")

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I add AT+CMEE=2 comand before test  
result:  
AT+CPIN? +CME ERROR: SIM not inserted  
AT+CSQ +CSQ 21,99  
AT+CREG=2 OK  
AT+CIMI +CME ERROR: SIM not inserted  
AT\*PSNTRG? +CME ERROR: SIM not inserted  
AT+KBND? +KBND: 04 OK  
AT+COPS? +COPS: 0 OK  
AT+COPS=? Not responce. Modem hung up  
AT+CREG? +CREG: 2,0 OK  
AT+CGDCONT? +CME ERROR: SIM not inserted  
AT+CGACT? +CME ERROR: SIM not inserted  
AT+CGATT? +CME ERROR: SIM not inserted

But sim insert in SIM1. This sim work with hl6528 without automotive grade in marking.  
The problematic modem does not send any signals to the SIM card (tested by oscilloscope).

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<div class="post-metadata">

**Author:** ![LemonGreen](https://avatars.discourse-cdn.com/v4/letter/l/82dd89/32.png) [@LemonGreen](https://forum.sierrawireless.com/u/LemonGreen)\
**Post date:** [November 25, 2021, 7:10am UTC](https://forum.sierrawireless.com/t/hl6528-auto/25574/5 "2021-11-25T07:10:06Z")

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Hi @kalinin.vldmr ,  
Which board are you using for the module? How many SIM card slot are supported on the board?  
Have you tried to query default SIM card by command : AT+KSDS?

Thanks

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**Author:** ![kalinin.vldmr](https://avatars.discourse-cdn.com/v4/letter/k/b19c9b/32.png) [@kalinin.vldmr](https://forum.sierrawireless.com/u/kalinin.vldmr)\
**Post date:** [November 25, 2021, 9:23am UTC](https://forum.sierrawireless.com/t/hl6528-auto/25574/6 "2021-11-25T09:23:30Z")

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+KSDS: 1 OK.  
I use self-developed PCB.  
…  
The problem seems to be solved.  
After AT comand AT+KGPIOCFG=3,1,1 and reebot modems works with SIM1.  
It cmd pulled up GPIO3 pin (UIM1\_DET).  
In technical spec printed: UIM1\_DET: UIM detection (optional). In my pcb it pin left open - in fact it work with hl5528(not AUTO) and dont work with HL6528 AUTO.