RC7620 and HTTPS

Liam · April 2, 2020, 9:38am

Hi,

I noticed recently that you are starting to publish some data on the RC series of modems.
We currently use the HL7692 in the UK/EU and are using HTTPS via AT commands.

The RC7620 looked like an interesting new module - from our perspective we were more interested in it’s wider frequency range bands and 3G fallback, but according to the migration guide this module doesn’t support HTTPS, but supports HTTP only.

Is there a reason why Sierra Wireless have chosen to not implement HTTPS via AT commands? And is there an alternative way of doing it - presumably via legato?

Thank you in advance for any additional information you can provide at this time.

mlw · April 2, 2020, 11:21am

@Liam,

So at the moment it looks like it is not supported although the existing manual does show a little ambiguity (the HTTP config command does show the option of

To date you would be surprised how little the higher layer protocol commands are used, especially with security and given limited resources (as everyone has) we cannot implement everything so we have to look at what is being commonly used.

Having said the above I have pinged the product manager to understand where we are with it.

Regards

Matt

mlw · April 2, 2020, 11:25am

Clearly I lost the will to live mid sentence above, to finish it.

(the HTTP config command does show the option of creating a secure connection in the current documentation).

Liam · April 2, 2020, 11:29am

Hi Matt,

Thanks for the update.

I’ll keep an eye out for the response from your product manager. If the HTTP config does indeed support a secure connection, then that could work for us. It would be surprising to find that it doesn’t with the push for greater security with IOT.

Thanks,
Liam

mlw · April 9, 2020, 10:56am

@Liam,

Having discussed it with the product manager it appears that the firmware will/does support the loading of keys onto the unit using the normal commands and subsequently using the at+khttpcfg command to set it to run over TLS (making it a HTTPS connection).

The command manual needs updating which hopefully it will be shortly.

Regards

Matt

Liam · April 9, 2020, 11:10am

Hi Matt,

Thanks for the update - one of your colleagues reached out about this via email earlier in the week.

I didn’t actually realise that KHTTPCFG supports HTTPS on the HL7692 as well, so it looks like i’ll be able to try that and update our codebase to use KHTTP instead of KHTTPS anticipating any change over to the RC7620 when they become available.

Thanks for your help.

nguyenquoctien · April 6, 2021, 3:55am

hi @mlw

i also have the same problem with HTTPs on RC7620 module

currently, is there support from Sierra Wireless to implement HTTPs via AT commands?, and is there way of doing it?

thanks

Donald · April 6, 2021, 4:34am

Hi @nguyenquoctien ,

Sierra Wireless will support full actions of HTTPs via AT command on next release of RC76xx device. Detail you can refer to this topic Upgrading HTTP from HL to RC series

Currently, RC76xx supports the actions of HTTP protocol as below:

HTTP GET
HTTP CLOSE
HTTP DELETE
HTTP HEAD (Get HTTP headers)

Detail you can refer to this document. AirPrime - RC76xx - AT Command Reference Guide - Rev8.0.zip.001.z (4 MB) AirPrime - RC76xx - AT Command Reference Guide - Rev8.0.zip.002.z (38.6 KB) .Remove “.z” at the filename then unzip them.

Hope this is helpful for you

Thanks,

nguyenquoctien · April 6, 2021, 4:50am

@Donald
thanks for your help

huydai2004 · April 13, 2021, 7:29am

Hi everybody.

Now I am donging on the SR7620 module. I have a problem:
I use the HTTP post method via AT commands (refer sample.txt file in this topic “Upgrading HTTP from HL to RC series”. but I have received an error code (+KHTTP_ERROR: 1,5). I do not why. and I don’t know how to fix it.

I have 2 SR7620 modules. A module is loaded firmware version “Revision: SWI9X07H_00.03.03.00 2bb7a4 jenkins 2020/04/15 07:57:29” another is “Revision: SWI9X07H_00.08.07.00 0ce4c1 jenkins 2021/03/17 02:18:20”
both the modules as the same error code when I use HTTP_post.

everybody tell me how to fix it.
detail, please refer to the file attactment. In herehttp_fail.txt (1.6 KB)

[2021-04-13_13:56:34:323]AT
[2021-04-13_13:56:34:323]OK
[2021-04-13_13:56:37:056]ati
[2021-04-13_13:56:37:058]Manufacturer: Sierra Wireless, Incorporated
[2021-04-13_13:56:37:058]Model: RC7620
[2021-04-13_13:56:37:058]Revision: SWI9X07H_00.03.03.00 2bb7a4 jenkins 2020/04/15 07:57:29
[2021-04-13_13:56:37:058]IMEI: 353634110170700
[2021-04-13_13:56:37:058]IMEI SV: 14
[2021-04-13_13:56:37:058]FSN: 7Q1017851913B0
[2021-04-13_13:56:37:058]+GCAP: +CGSM

[2021-04-13_13:56:37:058]OK
[2021-04-13_13:56:43:124]AT+CPINR

[2021-04-13_13:56:43:124]+CPINR: SIM PIN,3
[2021-04-13_13:56:43:124]+CPINR: SIM PUK,10
[2021-04-13_13:56:43:124]+CPINR: SIM PIN2,3
[2021-04-13_13:56:43:124]+CPINR: SIM PUK2,10
[2021-04-13_13:56:43:124]+CPINR: PH-NET PIN,255
[2021-04-13_13:56:43:124]+CPINR: PH-NETSUB PIN,255
[2021-04-13_13:56:43:124]+CPINR: PH-SP PIN,255
[2021-04-13_13:56:43:124]+CPINR: PH-CORP PIN,255
[2021-04-13_13:56:43:124]+CPINR: PH-FSIM PIN,255

[2021-04-13_13:56:43:124]OK
[2021-04-13_13:56:45:848]AT+CSQ

[2021-04-13_13:56:45:848]+CSQ: 28,99

[2021-04-13_13:56:45:848]OK
[2021-04-13_13:56:52:053]at+kcnxcfg=1,“GPRS”,“m3-world”,“mms”,“mms”

[2021-04-13_13:56:52:060]OK
[2021-04-13_13:56:55:202]at+khttpcfg=1,“httpbin.org”,80

[2021-04-13_13:56:55:261]+KHTTPCFG: 1

[2021-04-13_13:56:55:261]OK

[2021-04-13_13:56:55:267]+KCNX_IND: 1,4,1

[2021-04-13_13:56:55:267]+KCNX_IND: 1,2,1,2,30

[2021-04-13_13:57:25:274]+KCNX_IND: 1,4,2
[2021-04-13_13:57:25:282]+KCNX_IND: 1,2,2,2,30
[2021-04-13_13:57:25:285]+KHTTP_ERROR: 1,5

[2021-04-13_13:57:55:290]+KCNX_IND: 1,4,3
[2021-04-13_13:57:55:300]+KCNX_IND: 1,2,3,2,30

jerdung · April 14, 2021, 2:23am

Hi @huydai2004,

Following your log, I see that module is having issue with PDP connection. Your module is trying to connect PDP but it can’t, this is shown in notification +KCNX_IND.
Please make sure your module attached network. You can check EPS registration status by AT command AT+CEREG? (Right value of stat parameter is 1 or 5). You can refer below picture:

Beside that, can you check APN setting in command +KCNXCFG is the same as APN setting in command +CGDCONT? Please make sure they have the same APN then try again.
If this issue still exits, please send me the log with all AT command you excuted.

Thanks

huydai2004 · April 14, 2021, 4:34am

Hi @jerdung.
thanks for your support!

I checked registration status and It reponded (+CEREG: 2,1,“46F”,“2”,“1C7970C”,7) Capture

But I still receive an error code (+KHTTP_ERROR: 1,5).

Detail, please refer to the attactment file, In here rc7620_faill_http.txt (2.1 KB) (rc7620_faill_http.txt)

Have a nice day!

jerdung · April 14, 2021, 7:49am

Hi @huydai2004,

What the login (“mms”) and password (“mms”) value in your AT command +KCNXCFG is used for?
Have you tried to set as below?

at+kcnxcfg=1,“GPRS”,“m3-world”

Thanks,

huydai2004 · April 14, 2021, 9:24am

hi @jerdung

The carrier I am using is VINAPHONE.
“m3-world” is APN.
“mms” is a username
and “mms” is a password
You can refer to this link “Vinaphone Vietnam APN Configuration Settings - APN Settings Search Engine”

I to try again as you ask (at+kcnxcfg=1,“GPRS”,“m3-world”,"","") . But I still received an error code (+KCNX_IND: 1,2,7,2,30).

You can see the detail in the attachment file. rc7620_faill_http.txt (1.5 KB)

jerdung · April 14, 2021, 10:24am

Hi @huydai2004,

Can you excute command AT+CGPADDR then send me the result?

Thanks,

huydai2004 · April 14, 2021, 10:33am

Thanks for your support! @jerdung

you can see in 107 line. rc7620_check_status.txt (4.4 KB)

Thanks and best regard!

jerdung · April 15, 2021, 4:45am

Hi @huydai2004,

Can you check if your sim has data using for internet access? You can refer to below command and send me the result:

at+cusd=1,"*101#",15
at+cmgf=1
at+cnmi=1,1
at+cmgs="888"
> DATA<ctrl-Z/ESC>
at+cmgr=<index in URC +CMTI>

Beside that, please check your antenna, I see in your log, your network signal is not stable:

With:
+CEREG: 0 means: Not registered; MT is currently not searching for an operator to register to
+CEREG: 2 means: Not registered but MT is currently trying to attach or searching for an operator to
register to

Can you provide the result after sending command AT+CSQ? for me?

Thanks,

huydai2004 · April 15, 2021, 7:35am

good afternoon @jerdung.

My SIM definitely has data for the internet. when I plug SIM into the smartphone I can normally access the internet.

Thanks.

jerdung · April 15, 2021, 7:52am

Hi @huydai2004,

Are you mounting your module with Windows PC or Linux PC? If you are using Windows PC, you can disable Cellular created by your module as below:

Then you can try to create HTTP connection and send me the result.

Thanks

huydai2004 · April 15, 2021, 9:25am

Hi @jerdung

My PC is Windows. below is the result when I turn off Cellular.
I have a new problem.
when I send the AT+KHTTPCFG=… command.
It responded +KHTTP_IND: 1,1
But after that: I continually send the at+khttpheader=1 command. I have received “CONNECT”. After a while, I receive an error code “+KHTTP_ERROR: 1,6”

You can check in the attachment file.http_header_fail.txt (1.9 KB)

Thanks!

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RC7620 and HTTPS

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