lte_lc: Failed to set functional mode. Please check XSYSTEMMODE nrf9160

[park jae wan]

I'm checking the function by uploading the code to the pcb that uploaded the nrf9160 chip.

I checked that the network communication is normal on the previous 9160dk board.

As a result of uploading the code to the custom board and trying again, it has been confirmed that there is a problem with the modem as shown below.

[00:01:21.507,904] <err> lte_lc: Failed to subscribe to CEREG notifications, error: 65536
[00:01:21.507,904] <err> lte_lc: Failed to enable notifications, error: -14
[00:01:21.507,904] <err> nrf_modem_lib_netif: lte_lc_func_mode_set, error: -14
[00:01:21.507,934] <inf> NRFX_EXAMPLE: conn_mgr_all_if_connect, error: -14
[00:01:31.515,136] <err> nrf_modem_lib_netif: Modem error: 0xfff, PC: 0x0
[00:01:31.515,167] <err> lte_lc: Failed to set functional mode. Please check XSYSTEMMODE.
[00:01:31.515,167] <err> nrf_modem_lib_netif: lte_lc_func_mode_set, error: -14
Fatal error received from the connectivity layer
getaddrinfo() failed, err -11
[00:01:33.515,350] <err> lte_lc: Failed to set functional mode. Please check XSYSTEMMODE.
[00:01:33.515,380] <err> nrf_modem_lib_netif: lte_lc_func_mode_set, error: -14
[00:01:33.515,411] <inf> NRFX_EXAMPLE: conn_mgr_all_if_disconnect, error: -14

I don't know how to change the uart pin and see if the modem's firmware is the problem.

It would be nice if you could give me some advice.

Thank you.

[Øyvind]

As is states in the bottom, there is no network available. We need to figure out why this is. What modem FW are you running on your device?

park jae wan said:

and i try command that AT+CGSN=1 

+CGSN: "350916069243163"

Ok, thanks for confirming. Just needed to verify that your device has a IMEI programmed. 

Can you please use the Cellular: AT Client sample  and issue the same AT commands? You can use AT+CGMR

The AT monitor sample does not provide any good answers other than there is no network.

Does your device show in Cellular Monitor in the nRF Connect for Desktop? If possible, can you connect to your device by "selecting device". Afterwards you open serial terminal to see terminal output and click on start in Cellular Monitor. After doing so you can click on "Refresh dashboard". What do you get in the terminal?

Here is my output from AT client running on my DK

*** Booting nRF Connect SDK v3.5.99-ncs1 ***
The AT host sample started
Ready
> AT+CFUN=1
OK
> AT%XCONNSTAT=1
OK
> AT%XCONNSTAT?
%XCONNSTAT: 0,0,0,0,0,0
OK
> AT+CMEE=1
OK
> AT%XSIM=1
OK
> AT+CEREG=5
OK
> AT%MDMEV=1
OK
> AT%CESQ=1
OK
> AT+CGSN=1
+CGSN: "351901936411325"
OK
> AT+CGMM
nRF9160-SICA
OK
> AT+CEMODE?
+CEMODE: 2
OK
> AT+CMEE?
+CMEE: 1
OK
> AT+CNEC?
+CNEC: 0
OK
> AT+CGEREP?
+CGEREP: 0,0
OK
> AT+CIND=1,1,1
OK
> AT+COPS=3,2
OK
> AT+CGDCONT?
OK
> AT+CGACT?
OK
> AT+CESQ
+CESQ: 99,99,255,255,255,255
OK
> AT%XSIM?
%XSIM: 0
OK
> AT+CPIN?
+CME ERROR: 13
> AT+CIMI
+CME ERROR: 0
> AT+CNEC=24
OK
> AT+CEER
OK
> AT+CGEREP=1
OK
> AT%XPOFWARN=1,30
OK
> AT%XVBATLVL=1
OK
> AT+CGMI
Nordic Semiconductor ASA
OK
> AT+CGMR
mfw_nrf9160_1.3.7
OK
> AT+CGSN
351901936411325
OK
> AT%XMODEMUUID
%XMODEMUUID: e7a1c54a-b07c-4512-9c3e-8ecbbfe2641d
OK
> AT%XDATAPRFL?
%XDATAPRFL: 2
OK
> AT+CEREG?
+CEREG: 5,4
OK
> AT+CFUN?
+CFUN: 1
OK
> AT%CESQ=1
OK
> AT+CSCON=1
OK
> AT+CSCON?
+CSCON: 1,0
OK
> AT+CPAS
+CPAS: 0
OK
> AT+CEDRXRDP
+CEDRXRDP: 0
OK
> AT%XTIME=1
OK
> AT%CONEVAL
%CONEVAL: 1
OK
> AT%XCBAND=?
%XCBAND: (1,2,3,4,5,8,12,13,18,19,20,25,26,28,66)
OK
> AT%XCBAND
%XCBAND: 0
OK
> AT%HWVERSION
%HWVERSION: nRF9160 SICA B1A
OK
> AT%XMODEMTRACE=1,2
OK
> AT%XSYSTEMMODE?
%XSYSTEMMODE: 1,1,1,3
OK
> AT%XICCID
+CME ERROR: 0
> AT%XEMPR?
%XEMPR: 
OK
> AT+CGDCONT?
OK
> AT+COPS?
+COPS: 0
OK
> AT%XMONITOR
%XMONITOR: 4
OK
> AT+CPINR="SIM PIN"
+CEREG: 90
%XSIM: 0,9

[park jae wan]

The confirmation is delayed. I'm sorry.

I tried to operate all the AT commands you uploaded.
The results are shown below

It doesn't seem to be a big problem. Can some other things be a factor that can cause problems?

OK
OK
OK
%XCONNSTAT: 0,0,0,0,0,0
OK
OK
OK
OK
OK
OK
%CESQ: 55,2,17,2
+CGSN: "350916069243163"
OK
nRF9160-SICA
OK
+CEMODE: 2
OK
+CMEE: 1
OK
+CNEC: 0
OK
+CGEREP: 0,0
OK
OK
OK
+CGDCONT: 0,"IP","globaldata.iot","10.155.56.192",0,0
OK
%CESQ: 55,2,12,1
+CGACT: 0,1
OK
+CESQ: 99,99,255,255,14,56
OK
%XSIM: 1
OK
+CPIN: READY
OK
204080743141593
OK
%CESQ: 55,2,17,2
OK
+CEER: "EMM 18"
OK
OK
OK
OK
%CESQ: 54,2,12,1
Nordic Semiconductor ASA
OK
%CESQ: 55,2,17,2
mfw_nrf9160_1.3.7
OK
350916069243163
OK
%XMODEMUUID: e7a1c54a-b07c-4512-9c3e-8ecbbfe2641d
OK
%XDATAPRFL: 2
OK
+CEREG: 5,5,"20CF","031ACC09",7,,,"11100000","11100000"
OK
%CESQ: 54,2,12,1
+CFUN: 1
OK
OK
OK
+CSCON: 1,0
OK
+CPAS: 0
OK
+CEDRXRDP: 0
OK
OK
%CESQ: 55,2,18,2
%CONEVAL: 0,0,7,51,16,29,"031ACC09","45006",30,2600,5,0,0,3,1,8,107
OK
%XCBAND: (1,2,3,4,5,8,12,13,18,19,20,25,26,28,66)
OK
%CESQ: 54,2,12,1
%XCBAND: 5
OK
%CESQ: 54,2,17,2
%HWVERSION: nRF9160 SICA B1A
OK
OK
%XSYSTEMMODE: 1,1,1,3
OK
%XICCID: 8931681011103482494F
OK
%XEMPR:
OK
+CGDCONT: 0,"IP","globaldata.iot","10.155.56.192",0,0
OK
+COPS: 0,2,"45006",7
OK
%CESQ: 53,2,12,1
%XMONITOR: 5,"LG U+","LG U+","45006","20CF",7,5,"031ACC09",30,2600,53,31,"","11100000","11100000","01001001"
OK
+CPINR: "SIM PIN",3
OK

Have a great day!