NB-IOT JIO SIM Not connecting asset tracker Work Up to RRC Connected and stuck there.

[Hardik.Harpal]

Using NB- IOT JIO SIM in india, not connecting asset tracker Work Up to RRC Connected and stuck there. This is custom code very similar to asset tracker example. We are using custom board, same setup works fine on Ibasis SIM in USA.

[00:00:00.215,576] [0m<inf> asset_tracker: Connecting to LTE network.[0m
[00:00:00.215,942] [0m<inf> asset_tracker: This may take several minutes.[0m
[00:00:00.223,205] [0m<dbg> lte_lc.lte_lc_system_mode_set: Sending AT command to set system mode: AT%XSYSTEMMODE=0,1,1,0[0m
[00:00:00.259,643] [0m<inf> lte_lc: PDP Context: AT+CGDCONT=0,"IPV6","JioIPIoT"[0m
[00:00:00.267,608] [0m<dbg> lte_lc.lte_lc_system_mode_set: Sending AT command to set system mode: AT%XSYSTEMMODE=0,1,1,0[0m
[00:00:27.635,711] [0m<dbg> lte_lc.at_handler: +CEREG notification: +CEREG: 2,"C061","00282218",9
[0m
[00:00:27.636,444] [0m<inf> asset_tracker: LTE cell changed: Cell ID: 2630168, Tracking area: 49249[0m

trace-2021-07-13T00-06-58.563Z.pcapng

trace-2021-07-13T00-06-58.563Z.bin

[Hardik.Harpal]

Is there anything particular observation that may cause this issue?

[Hardik.Harpal]

I tried with AT command from link monitor ant AT client on nRF9160 DK seeing following log.

Which shows

+CNEC_EMM: 8

From devzone other questions I came to know 

As per https://www.etsi.org/deliver/etsi_ts/124300_124399/124301/14.03.00_60/ts_124301v140300p.pdf#page=420

 

Cause #8 – EPS services and non-EPS services not allowed This EMM cause is sent to the UE when it is not allowed to operate either EPS or non-EPS services.

Still is anything from firmware we can do to resolve this. Or What can I ask JIO Service provider about this, I raised query to them, but they are not replied yet. Can you confirm error case and possible way to resolve it, so we can work on that direction? 

AT%XSYSTEMMODE=0,1,1,0
OK
AT+CGDCONT=0,"IP","JioIPIoT"
OK
AT+CFUN=1
OKAT+CFUN?+CFUN: 1
OK
AT+CGSN=1
+CGSN: "352656100047607"
OK
AT+CGMI
Nordic Semiconductor ASA
OK
AT+CGMM
nRFFFFFFFFF-SICA
OK
AT+CGMR
mfw_nrf9160_1.2.3
OK
AT+CEMODE?
+CEMODE: 0
OK
AT%XCBAND=?%XCBAND: (1,2,3,4,5,8,12,13,17,19,20,25,26,28,66)
OK
AT+CMEE?+CMEE: 0
OK
AT+CMEE=1
OK
AT+CNEC?
+CNEC: 0
OK
AT+CNEC=24
OK
AT+CGEREP?
+CGEREP: 0,0
OK
AT+CGDCONT?
+CGDCONT: 0,"IP","JioIPIoT","",0,0
OK
AT+CGACT?
+CGACT: 0,0
OK
AT+CGEREP=1
OK
AT+CIND=1,1,1
OK
AT+CEREG=5
OK
AT+CEREG?
+CEREG: 5,4,"FFFE","FFFFFFFF",9,0,0,"00000000","00000000"
OK
AT%CESQ=1
OK
AT+CESQ
+CESQ: 99,99,255,255,255,255
OK
AT%XSIM=1
OK
AT%XSIM?
%XSIM: 1
OK
AT+CPIN?
+CPIN: READY
OK
AT+CPINR="SIM PIN"
+CPINR: "SIM PIN",10
OK
AT+CIMI
405857600001650
OK
%CESQ: 97,4,28,4
+CEREG: 2,"C061","00282218",9,0,0,"11100000","11100000"
+CNEC_EMM: 8
+CEREG: 0,"C061","00282218",9,0,8,"11100000","11100000"
%CESQ: 255,0,255,0

[Hardik.Harpal]

It is little urgent, can you reply soon if possible.

I have shared same modem trace to JIO, but they are still asking for modem log so is nRF9160 modem log does not include all LTE Physical, MAC, RRC, NAS signaling prints. Below is their reply.

The logs attached previously. Shows device read the SIB1, 2, 3 but in the logs we do not see any NAS message. Either logs did not capture the parameters properly or device did not send.

Also, we cannot debug with AT command logs. With AT commands it only shows the status, but not the reason.

We would always need the modem logs to debug.

Please try to capture the Modem logs and send to us.

Thank you.

[Hakon]

Hello,

I will hand the trace file over to the modem team so they can analyze it.

[Hakon]

Also, I will need the version number of the modem firmware.