# HTTPS Error with GL7600

**URL:** <https://forum.sierrawireless.com/t/https-error-with-gl7600/27402>\
**Category:** Uncategorized\
**Created:** [July 7, 2022, 7:43am UTC](https://forum.sierrawireless.com/t/https-error-with-gl7600/27402 "2022-07-07T07:43:03Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![JanBurg](https://avatars.discourse-cdn.com/v4/letter/j/13edae/32.png) [@JanBurg](https://forum.sierrawireless.com/u/JanBurg)\
**Post date:** [July 7, 2022, 7:43am UTC](https://forum.sierrawireless.com/t/https-error-with-gl7600/27402/1 "2022-07-07T07:43:03Z")

</div>

Hello,  
I am trying to establish a HTTPS connection to ThingSpeak of MathWorks.  
These are the commands I am using:

AT+KCNXCFG=1,“GPRS”,“TM”  
OK  
AT+KHTTPSCFG=1,“[api.thingspeak.com](http://api.thingspeak.com)”,443  
+KHTTPSCFG: 1  
OK  
AT+KHTTPSHEADER?  
OK  
AT+KHTTPSGET=1,“/update?api\_key=_ **channelID** _&field1=1”  
NO CARRIER  
+KHTTPS\_ERROR: 1,12

The error means “Validate server’s certificate error”.  
The server’s root certificate is installed in the modem.  
What could be the reason?

The modem connects flawlessly with HTTP via port 80.  
Any help would be appreciated.

---

<div class="post-metadata">

**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\
**Post date:** [July 7, 2022, 8:08am UTC](https://forum.sierrawireless.com/t/https-error-with-gl7600/27402/2 "2022-07-07T08:08:36Z")

</div>

does your server need two-way authentication or one-way authentication?  
you need to specify the sec\_level in +KHTTPSCFG