EM9190: AT+CREG? returns 0,0

1

Hi there,

I have EM9190 with the following parameters,

at+gmr
SWIX55C_03.06.01.00 81c5ca jenkins 2021/10/08 18:39:25

OK
at+cpin?
+CPIN: READY

OK
AT+CFUN=1
OK

I set the Band to NR5G ALL

AT!BAND?
Index, Name
0C, NR5G ALL,
0 - GW: 0000000000000000
1 - LTE: 0000000000000000 0000000000000000
3 - NRNSA: 000081A0090808D7 0000000000007042
4 - NRSA: 000081A0090808D7 0000000000007042

OK
AT!GSTATUS?
!GSTATUS:
Current Time: 7943 Temperature: 35
Modem Mitigate Level: 0 ModemProc Mitigate Level: 0
Reset Counter: 1 Mode: ONLINE
System mode: NR5G PS state: Not attached
IMS reg state: NOT REGISTERED IMS mode: Normal
IMS Srv State: UNKNOWN SMS,UNKNOWN VoIP

NR5G TAC: 000002 NR5G Cell ID: 174
NR5G band: n78 NR5G Carrier ID: 0
NR5G dl bw: 20 MHz NR5G ul bw: Unknown
NR5G Tx Power: — NR5G Tx chan: 0
NR5G Rx chan: 634050
NR5G dl MIMO: 0 NR5G ul MIMO: 0
NR5G(sub6) RxM RSSI (dBm): -62.4 NR5G(sub6) RxD RSSI (dBm): -85.1
NR5G(sub6) RxM1 RSSI (dBm): — NR5G(sub6) RxD1 RSSI (dBm): —

NR5G RSRP (dBm): — NR5G RSRQ (dB): —
NR5G SINR (dB): —

OK
AT+COPS=?
+COPS: (1,“IND-JIO”,“JIO”,“405869”,12),(0,1,2,3,4),(0,1,2)

OK
AT+COPS?
+COPS: 1

OK
AT+CREG?
+CREG: 0,0

OK
AT+CGREG?
+CGREG: 0,0

OK

  1. Why does CREG? command returns 0,0? What could be the possible reason? Please note, I connected the antenna to the module.
  2. The response for the COPS command is +COPS: (1,“IND-JIO”,“JIO”,“405869”,12), what does 12 convey? I understand it meant the type of access technology. So, what does 12 refers to here?
  3. What are all the other things I need to configure for this module to work, for it to transfer data?

Thanks,
Monisha

2

Did you set correct APN in at+cgdcont?

Did you try latest FW?

Can it register LTE network?

For detail of +COPS, you can see:

3

hey @jyijyi,

  1. We didn’t set the APN first. After you comment, I have set the APN. And below is the output response.
    AT+CGDCONT?
    +CGDCONT: 1,“IP”,“jionet”,“0.0.0.0”,0,0,0,0,“”,0
    +CGDCONT: 2,“IPV4V6”,“ims”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0,“”,0

OK
After this command, I checked the CREG? command, still getting 0,0 as response.

  1. Regarding the firmware update, we are confused between choosing the right firmware. In the provided link, there are 2 Generic carrier firmwares available.
    Our requirement is, the module should be able to transfer data irrespective of the carrier chosen.
    source.sierrawireless.com/resources/airprime/software/em919x/em9-approved-fw-packages/#sthash.OCzenIvH.dpbs

  2. Before setting the Band to NR5G ALL, the module was in LTE mode. And I was able to register the network and received 0,1 for CREG? command.

Couple more questions,
I got 99,99 as response for AT+CSQ command. If I get the antenna running, will the network register? If so, what should I need to do to get the antenna up?

Thanks,
Monisha

4

You can set to at!band=0 and then establish data connect to ping 8.8.8.8, and check in at!gstatus? To see if it is in 5G ENDC mode

5

What are the AT commands and procedures to establish data connection in EM9190?
Do you have any reference document/guide to follow?

Thanks,
Monisha

6

did you install the MBPL USB driver?
https://source.sierrawireless.com/resources/airprime/software/mbpl/mbpl-software-latest/#sthash.tyPcRKcZ.dpbs

You can use MBIM command to start the data establishment:

7

Depends on operating system for data connection. Also did you select 5G with “AT!SELRAT=20”