Activate specific PDP context on EM7430

IoT Modules MC/EM Series
1

I am using EM7430 module. For data connection the module is always using the first PDP context to make connection with cell operator other than Verizon (for Verizon 3). I have tried this command “AT!SCACT=1,2” to activate PDP context 2, but its get failed.

In the following cases with Airtel SIM inserted, for case#1 there is an active connection, whereas for case#2 connection is not established. How to activate PDP context 2 (or specific PDP context other than default) instead of 1 to make use of multiple SIM cards re-inserted with different APNs configured at PDP contexts.

Case 1:

AT+CGDCONT?
+CGDCONT: 1,“IPV4V6”,“airtelgprs.com”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0
+CGDCONT: 2,“IPV4V6”,“jionet”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0

OK
AT+CGCONTRDP
+CGCONTRDP: 1,5,airtelgprs.com,100.93.104.161,36.1.73.0.78.46.177.213.185.247.124.160.100.242.174.15,9.0.80.0 254.128.0.0.0.0.0.0.0.0.0.0.0.0.0.1,117.96.122.70 36.1.73.0.0.80.0.9.0.0.0.0.0.0.2.10,122.175.1.5 36.1.73.0.0.80.0.9.0.0.0.0.0.0.0.117

OK
AT!SCACT?
!SCACT: 1,1
!SCACT: 2,0

OK

Case 2:

AT+CGDCONT?
+CGDCONT: 1,“IPV4V6”,“jionet”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0
+CGDCONT: 2,“IPV4V6”,“airtelgprs.com”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0

OK

AT+CGCONTRDP
OK

AT!SCACT?
!SCACT: 1,0
!SCACT: 2,0

OK

AT!SCACT=1,2
ERROR

AT+CGACT?
+CGACT: 1,0
+CGACT: 2,0

OK

AT+CGACT=1
+CME ERROR: no network service

AT+CGATT?
+CGATT: 0

OK

AT+CGATT=1
+CME ERROR: no network service

2

how about setting both APN of profile 1 and 2 to “airtelgprs.com”?
BTW, have you verified AT!GSTATUS? for case 2?

3

If I set APN of both profiles to “airtelgprs.com” then the connection is established. Is there a way that I make connection for case#2 without modification in APN of profiles?

This was the output of AT!GSTATUS? for case#2:
AT!GSTATUS?
!GSTATUS:
Current Time: 83056 Temperature: 44
Reset Counter: 1 Mode: ONLINE
System mode: WCDMA PS state: Not attached
WCDMA band: WCDMA 2100
WCDMA channel: 10782
GMM (PS) state:DEREGISTERED LIMITED SERVICE
MM (CS) state: IDLE LIMITED SERVICE

WCDMA L1 state:L1M_PCH_SLEEP LAC: 0D09 (3337)
RRC state: DISCONNECTED UTRAN Cell ID: 01517A5B (22116955)
RxM RSSI C0: -93 RxD RSSI C0: —
RxM RSSI C1: — RxD RSSI C1: —

OK

4

I think jionet is not a correct apn in your environment

5

“jionet” is APN for Jio operator. How to get connection for Airtel SIM with case#2 scenario, where its APN is defined as profile 2

6

but in your case 2, once you set up jionet in profile 1, it cannot even get IP address.
And from AT!GSTATUS of case 2, it cannot even register network…

7

Yes, what could be the reason for not getting connection in case#2, does modem try establishing connection with only profile 1, or will it try with profile 2 as well? The same Airtel SIM is functional with case#1 scenario, where its APN is defined at profile 1

8

i think it would connect with profile 1 first, as from your testing, if you change the APN of profile 1, it cannot even register network

9

It means there should not be any wrong profile defined before correct profile. How should I delete profile 1 completely and then the result should show like below (in other way I just want to use only profile 2)
AT+CGDCONT?
+CGDCONT: 2,“IPV4V6”,“airtelgprs.com”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0

OK

10

why don’t you just set profile 1 APN to be “airtelgprs.com”?

11

There is another use case where if it has following profiles defined for Verizon SIM, then the active connection is being created on class 1 instead of 3 (as mentioned in UG verizon uses PDP context 3)
+CGDCONT: 1,“IPV4V6”,“”,“0.0.0.0”,0,0,0,0
+CGDCONT: 3,“IPV4V6”,“vzwinternet”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0

+CGCONTRDP: 1,5,vzwinternet,100.111.206.139,198.224.169.135,198.224.171.135

12

EM7430 does not have VZW carrier setting:

https://source.sierrawireless.com/resources/airprime/minicard/74xx/em_mc74xx-approved-fw-packages/#sthash.K14Rq2n1.dpbs

Better use EM7455 to test VZW