Failed to connect RC76xx and AirVantage service

IoT Modules RC76
#1

Hello

I am trying to connect my RC7620-1 module with the AirVantage service, but it does not work for me. I have registered the device according to the instructions and am trying to initiate a connection …

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I run the following set of the command and don’t even get any notification (+WDSI) about the errors or the connection state

ati
Manufacturer: Sierra Wireless, Incorporated
Model: RC7620-1
Revision: SWI9X07H_00.03.03.00 2bb7a4 jenkins 2020/04/15 07:57:29
IMEI: 353635110143399
IMEI SV: 14
FSN: 7T0507863616B0
+GCAP: +CGSM,+DS,+ES

OK
at+cpin?
+CPIN: READY

OK
at+creg?
+CREG: 1,1

OK
at+csq
+csq: 11,99

OK
at+cgdcont=1,“IP”,“mts”
OK
at+wdsi=4479
OK
at+wdsc?

+WDSC: 0,0
+WDSC: 1,1
+WDSC: 2,1
+WDSC: 3,3
+WDSC: 4,15,60,240,480,1440,2880
+WDSC: 5,1
+WDSC: 6,0

OK
at+wdsg?

+WDSG: 0,2
+WDSG: 1,0

OK
at+wdss=2,1
OK
at+wdss=1,1
OK
at+wdss?

+WDSS: 1,1
+WDSS: 2,1

OK
at+wdsg

+WDSG: 0,2
+WDSG: 1,0

OK
at+wdse
OK

And I receive notifications only after the modem is rebooted.

+WDSI: 4

+WDSI: 5

+WDSI: 7

+WDSI: 8

+WDSI: 8

I understand the status that: “Authentication with the server failed”.
So there is a questions:

  1. Why “Authentication with the server failed” if the IMEI and Serial Number is correct (check ATI and image above)?
  2. Why +WDSI notifications came only after restarting the device, but not during work( for example when I run AT+WDSS=1,1) ?
  3. Why +WDSG: 0,2, if I set CID(APN) with AT+WDSS=2,1, or what I should do to make it +WDSG: 0,3 ?
#2

Hi @69azwraith

+WDSG:0,2 it means the module is in bootstrap session, It is not connected to ALMS successfully
+WDSG: 0,3, it means the module connects to ALMS successfully

From your log, it looks like the module is not able to reach to internet. So, please verify that the insert SIM has data, APN is configured probably. Then, try again
Please share if you have more questions. Help us tick “Solution” if it is useful. It might be beneficial to someone getting same problem
Thanks

#3

Hi @Vianney

SIM is ok, I checked, I can oped PPP connection and send data, so the data channel is ok and the APN is correct.

Today the device successfully connected with AVMS automatically after boot, but when I close session (AT+WDSS=1,0) and try to open it again, it wasn’t open, with no notification or errors

+CREG: 1

+WDSI: 4

+WDSI: 6

+WDSI: 23,0
+WDSI: 4

+WDSI: 6

+WDSI: 23,1

at+wdss=1,0
OK

+WDSI: 8
at+wdss=1,1
OK
at+wdsg

+WDSG: 0,3
+WDSG: 1,0

OK
at+wdsi?

+WDSI: 4479
at+wdss=1,1

OK

As you can see, there are no notifications and errors in this listing at all, although notifications are enabled

#4

Hi @69azwraith ,

In this scenario, we may need to cross check somethings

  1. First, please make sure that your PC connected with RC76 device does not use this module to reach to internet. If your PC automatically uses module to reach to internet. It may cause this issue.
    If yes, please turn off the cellular automatically connect feature on your PC. Then check again
  2. If the answer of 1 is No. Next steps is: What kind of network is the device using? GSM? UMTS? LTE? or something else? If you don’t use LTE technology, please send command before AT+WDSS=1,1 command
    AT+CGACT=1,1
    (assuming that your device is using PDP context 1 for connecting to AVMS - +WDSS: 2,1)
  3. How long did you wait for the response after WDSS=1,1 command? As perspective end user, the module should get the response in 1~3 mins (basing on the network)
  4. Is your device running on latest FW? if no, please try to upgrade it to latest FW to see any better
  5. If it still happens after doing 4 above steps, how percent did this issue happen? Or Always? Does the issue go away after a reset?

Please help to try above steps and check again.

Thanks,

#5

Hi @Vianney
Thank you for support, you were right, about first point:

First, please make sure that your PC connected with RC76 device does not use this module to reach to internet.

Without opened connection it works fine. Of course, I’m a little confused that +WDSI or the some error did not show incompatibility of these functionality.

Can the modem open two connections at the same time? One with the AirVantage service and the other for the user usage? For example with different CIDs for this?

#6

Hi @69azwraith

In theory, the module will support to activate multiple PDP context for the multiple connections. Please make sure that the PDP contexts don’t have same APN
Thanks