NRF Location example finds cells but cannot connect on Custom nrf9160 board

[Dushan_cwx]

Hi all,

I have a custom board that closely follows the nrf9160-DK board, apart from the fact that I have not serial communication with the nrf9160 module. I am trying to run the same code on both devices (a modified version of the location example). On both devices I get LTE Cell Change event at some point after boot, however while the DK is able to establish an LTEM connection (Registered Roaming), the custom board is not able to do so even though both boards are able to identified the LTE Cell with the same ID. 

Looking at the difference between the logs, I can see that the custom device does not triggers PDN_EVENT_ACTIVATED event.

One difference between the two device was that I did onboard the nrf9160DK one nrfcloud while I can't do that for the custom board. Also these two board are using the simcards from the same provider.

Am I missing a step in bringing up the custom device or would that be related to the LTE link strength which I attempted to read without much success using 

lte_lc_conn_eval_params_get().

Left - Custom Board, Right - nrf9160 DK

Using the modem shell example (over RTT) I get a similar result:

 Where the DK is able to establish a connection (RCC Connected) but the custom board is stuck on searching.

Left - Custom Board, Right - nrf9160 DK:

[Didrik Rokhaug]

Hi,

Are you using the same SIM card on both the custom board and the DK, or just different SIM cards from the same provider?

Can you try to swap the SIM cards in the DK and the custom board?

Can you set CONFIG_LTE_LINK_CONTROL_LOG_LEVEL_DBG=y so that we can see the full +CEREG notification?

My hypothesis is that the SIM card in the custom board is not activated, or has the wrong subscription, so that when the custom board tries to connect to the network, it gets rejected.

Best regards,

Didrik

[Dushan_cwx]

Hello Didrik, 

Didrik Rokhaug said:

Are you using the same SIM card on both the custom board and the DK, or just different SIM cards from the same provider?

Can you try to swap the SIM cards in the DK and the custom board?

Thank you for the quick reply. I tried swapping the sim cards around, but still no luck, am seeing the same behaviour. 

Didrik Rokhaug said:

Can you set CONFIG_LTE_LINK_CONTROL_LOG_LEVEL_DBG=y so that we can see the full +CEREG notification?

My hypothesis is that the SIM card in the custom board is not activated, or has the wrong subscription, so that when the custom board tries to connect to the network, it gets rejected.

Best regards,

I have attached the logs with CONFIG_LTE_LINK_CONTROL_LOG_LEVEL_DBG=y, 

1. Custom Board

SEGGER J-Link V7.80d - Real time terminal output
SEGGER J-Link ARM V9.2, SN=59201843
Process: JLink.exe
*** Booting Zephyr OS build v3.3.99-ncs1 ***
Device pwmleds not found
1 LEDs Found
Location sample started

location_converstion test 1 51.019131: 51° 1' 8.9"N
location_converstion test 2 -51.037731: 51° 2' 15.8"S
location_converstion test 3 -1.626585: 1° 37' 35.7"W
location_converstion test 3 10.626885: 10° 37' 36.8"E
[00:00:00.647,338] <inf> nrf_modem_lib_trace: Trace thread ready
[00:00:00.655,059] <inf> nrf_modem_lib_trace: Trace level override: 2
Modem Battery Voltage: 3743
Modem FW Version: nrf9160_1.3.5
Device IMEI: 35265*************
[00:00:00.694,793] <dbg> lte_lc: init_and_config: System mode (7) and preference (0) are already configured
[00:00:00.696,716] <dbg> lte_lc_helpers: event_handler_list_append_handler: Handler already registered. Nothing to do
[00:00:00.746,093] <dbg> lte_lc: lte_lc_func_mode_set: CFUN monitor callback: 0x1ea65
at_scanf_int failed
SIM is not initialized
 Cause:
No Specific Cause
Waiting for LTE connection
LTE connection failed, error: -11
Neighbouring Cells: OK

Waiting for LTE connection
LTE connection failed, error: -11
Neighbouring Cells: OK

Waiting for LTE connection
LTE connection failed, error: -11
Neighbouring Cells: OK

Waiting for LTE connection
LTE connection failed, error: -11
Neighbouring Cells: OK

Waiting for LTE connection
LTE connection failed, error: -11
Neighbouring Cells: OK

Waiting for LTE connection
LTE connection failed, error: -11
Neighbouring Cells: OK

Waiting for LTE connection
LTE connection failed, error: -11
Neighbouring Cells: OK

Waiting for LTE connection
LTE connection failed, error: -11
Neighbouring Cells: OK

Waiting for LTE connection
[00:01:23.759,063] <dbg> lte_lc: at_handler_cereg: +CEREG notification: +CEREG: 2,"4301","01B51278",7

[00:01:23.759,857] <dbg> lte_lc_helpers: parse_cereg: Network registration status: 2
[00:01:23.760,437] <dbg> lte_lc_helpers: parse_cereg: LTE mode: 7
[00:01:23.760,986] <dbg> lte_lc_helpers: event_handler_list_dispatch: Dispatching event: type=0
[00:01:23.761,566] <dbg> lte_lc_helpers: event_handler_list_dispatch:  - handler=0x0001EC0D
[00:01:23.762,603] <dbg> lte_lc_helpers: event_handler_list_dispatch:  - handler=0x00013289
LTE: NW Reg Status: Searching..
[00:01:23.763,397] <dbg> lte_lc_helpers: event_handler_list_dispatch: Done
[00:01:23.763,916] <dbg> lte_lc_helpers: event_handler_list_dispatch: Dispatching event: type=4
[00:01:23.764,526] <dbg> lte_lc_helpers: event_handler_list_dispatch:  - handler=0x0001EC0D
[00:01:23.765,106] <dbg> lte_lc_helpers: event_handler_list_dispatch:  - handler=0x00013289
LTE cell changed:
mcc=0
mnc=0
id=28643960
tac=17153
earfcn=0
timing_advance=0
measurement_time=0
phys_cell_id=0
rsrp=0
rsrq=0

[00:01:23.766,540] <dbg> lte_lc_helpers: event_handler_list_dispatch: Done
[00:01:23.767,089] <dbg> lte_lc_helpers: event_handler_list_dispatch: Dispatching event: type=5
[00:01:23.767,669] <dbg> lte_lc_helpers: event_handler_list_dispatch:  - handler=0x0001EC0D
[00:01:23.768,280] <dbg> lte_lc_helpers: event_handler_list_dispatch:  - handler=0x00013289
LTE Mode update: LTEM
[00:01:23.769,012] <dbg> lte_lc_helpers: event_handler_list_dispatch: Done
LTE connection failed, error: -11
Neighbouring Cells: OK

Waiting for LTE connection
LTE connection failed, error: -11
Neighbouring Cells: OK

Waiting for LTE connection
LTE connection failed, error: -11
Neighbouring Cells: OK

Waiting for LTE connection
LTE connection failed, error: -11
Neighbouring Cells: OK

Waiting for LTE connection
LTE connection failed, error: -11
Neighbouring Cells: OK

Waiting for LTE connection
[00:02:13.817,138] <dbg> lte_lc: at_handler_cereg: +CEREG notification: +CEREG: 2

[00:02:13.817,779] <dbg> lte_lc_helpers: parse_cereg: Network registration status: 2
[00:02:13.818,328] <dbg> lte_lc_helpers: parse_cereg: LTE mode not found, error code: -22
[00:02:13.818,939] <dbg> lte_lc_helpers: event_handler_list_dispatch: Dispatching event: type=4
[00:02:13.819,549] <dbg> lte_lc_helpers: event_handler_list_dispatch:  - handler=0x0001EC0D
[00:02:13.820,129] <dbg> lte_lc_helpers: event_handler_list_dispatch:  - handler=0x00013289
LTE cell changed:
mcc=0
mnc=0
id=-1
tac=-1
earfcn=0
timing_advance=0
measurement_time=0
phys_cell_id=0
rsrp=0
rsrq=0

[00:02:13.821,441] <dbg> lte_lc_helpers: event_handler_list_dispatch: Done
[00:02:13.821,960] <dbg> lte_lc_helpers: event_handler_list_dispatch: Dispatching event: type=5
[00:02:13.822,540] <dbg> lte_lc_helpers: event_handler_list_dispatch:  - handler=0x0001EC0D
[00:02:13.823,150] <dbg> lte_lc_helpers: event_handler_list_dispatch:  - handler=0x00013289
LTE Mode update: NONE
[00:02:13.823,852] <dbg> lte_lc_helpers: event_handler_list_dispatch: Done
LTE connection failed, error: -11
Neighbouring Cells: OK

Waiting for LTE connection
LTE connection failed, error: -11
Neighbouring Cells: OK

Waiting for LTE connection
LTE connection failed, error: -11
Neighbouring Cells: OK

Waiting for LTE connection
LTE connection failed, error: -11
Neighbouring Cells: OK

Waiting for LTE connection
LTE connection failed, error: -11
Neighbouring Cells: OK

Waiting for LTE connection
LTE connection failed, error: -11
Neighbouring Cells: OK

Waiting for LTE connection
LTE connection failed, error: -11
Neighbouring Cells: OK

Waiting for LTE connection
LTE connection failed, error: -11
Neighbouring Cells: OK

Waiting for LTE connection
LTE connection failed, error: -11
Neighbouring Cells: OK

Waiting for LTE connection
LTE connection failed, error: -11
Neighbouring Cells: OK

Waiting for LTE connection
LTE connection failed, error: -11
Neighbouring Cells: OK

Waiting for LTE connection
LTE connection failed, error: -11
Neighbouring Cells: OK

Waiting for LTE connection
[00:04:14.895,935] <dbg> lte_lc: at_handler_cereg: +CEREG notification: +CEREG: 2,"AE45","00525C15",9

[00:04:14.896,728] <dbg> lte_lc_helpers: parse_cereg: Network registration status: 2
[00:04:14.897,308] <dbg> lte_lc_helpers: parse_cereg: LTE mode: 9
[00:04:14.897,827] <dbg> lte_lc_helpers: event_handler_list_dispatch: Dispatching event: type=4
[00:04:14.898,437] <dbg> lte_lc_helpers: event_handler_list_dispatch:  - handler=0x0001EC0D
[00:04:14.899,047] <dbg> lte_lc_helpers: event_handler_list_dispatch:  - handler=0x00013289
LTE cell changed:
mcc=0
mnc=0
id=5397525
tac=44613
earfcn=0
timing_advance=0
measurement_time=0
phys_cell_id=0
rsrp=0
rsrq=0

[00:04:14.900,451] <dbg> lte_lc_helpers: event_handler_list_dispatch: Done
[00:04:14.900,970] <dbg> lte_lc_helpers: event_handler_list_dispatch: Dispatching event: type=5
[00:04:14.901,580] <dbg> lte_lc_helpers: event_handler_list_dispatch:  - handler=0x0001EC0D
[00:04:14.902,160] <dbg> lte_lc_helpers: event_handler_list_dispatch:  - handler=0x00013289
LTE Mode update: NBIOT
[00:04:14.902,923] <dbg> lte_lc_helpers: event_handler_list_dispatch: Done
LTE connection failed, error: -11
Neighbouring Cells: OK

Waiting for LTE connection
LTE connection failed, error: -11
Neighbouring Cells: OK

Waiting for LTE connection
LTE connection failed, error: -11
Neighbouring Cells: OK

Waiting for LTE connection
LTE connection failed, error: -11
Neighbouring Cells: OK

Waiting for LTE connection
LTE connection failed, error: -11
Neighbouring Cells: OK

Waiting for LTE connection
LTE connection failed, error: -11
Neighbouring Cells: OK

Waiting for LTE connection
LTE connection failed, error: -11
Neighbouring Cells: OK

Waiting for LTE connection
LTE connection failed, error: -11
Neighbouring Cells: OK

Waiting for LTE connection
LTE connection failed, error: -11
Neighbouring Cells: %NBRGRSRP: 270,1526,26
OK

Waiting for LTE connection
LTE connection failed, error: -11
Neighbouring Cells: %NBRGRSRP: 270,1526,27
OK

Waiting for LTE connection
LTE connection failed, error: -11
Neighbouring Cells: %NBRGRSRP: 270,1526,26
OK

Waiting for LTE connection
LTE connection failed, error: -11
Neighbouring Cells: %NBRGRSRP: 270,1526,30,272,1526,20
OK

Waiting for LTE connection
LTE connection failed, error: -11
Neighbouring Cells: %NBRGRSRP: 270,1526,30,272,1526,19
OK

Waiting for LTE connection
LTE connection failed, error: -11
Neighbouring Cells: %NBRGRSRP: 270,1526,30,272,1526,19
OK

Waiting for LTE connection
LTE connection failed, error: -11
Neighbouring Cells: %NBRGRSRP: 270,1526,30,272,1526,19
OK

Waiting for LTE connection
LTE connection failed, error: -11
Neighbouring Cells: %NBRGRSRP: 270,1526,27,441,1526,16,272,1526,16
OK

Waiting for LTE connection
LTE connection failed, error: -11
Neighbouring Cells: %NBRGRSRP: 270,1526,30,441,1526,21
OK

Waiting for LTE connection
LTE connection failed, error: -11
Neighbouring Cells: %NBRGRSRP: 270,1526,30,441,1526,18
OK

Waiting for LTE connection
LTE connection failed, error: -11
Neighbouring Cells: %NBRGRSRP: 270,1526,28,441,1526,17
OK

Waiting for LTE connection
LTE connection failed, error: -11
Neighbouring Cells: %NBRGRSRP: 270,1526,29,441,1526,16
OK

Waiting for LTE connection
[00:07:35.232,116] <dbg> lte_lc: at_handler_cereg: +CEREG notification: +CEREG: 2

[00:07:35.232,788] <dbg> lte_lc_helpers: parse_cereg: Network registration status: 2
[00:07:35.233,367] <dbg> lte_lc_helpers: parse_cereg: LTE mode not found, error code: -22
[00:07:35.233,947] <dbg> lte_lc_helpers: event_handler_list_dispatch: Dispatching event: type=4
[00:07:35.234,558] <dbg> lte_lc_helpers: event_handler_list_dispatch:  - handler=0x0001EC0D
[00:07:35.235,137] <dbg> lte_lc_helpers: event_handler_list_dispatch:  - handler=0x00013289
LTE cell changed:
mcc=0
mnc=0
id=-1
tac=-1
earfcn=0
timing_advance=0
measurement_time=0
phys_cell_id=0
rsrp=0
rsrq=0

[00:07:35.236,450] <dbg> lte_lc_helpers: event_handler_list_dispatch: Done
[00:07:35.236,968] <dbg> lte_lc_helpers: event_handler_list_dispatch: Dispatching event: type=5
[00:07:35.237,548] <dbg> lte_lc_helpers: event_handler_list_dispatch:  - handler=0x0001EC0D
[00:07:35.238,128] <dbg> lte_lc_helpers: event_handler_list_dispatch:  - handler=0x00013289
LTE Mode update: NONE
[00:07:35.238,861] <dbg> lte_lc_helpers: event_handler_list_dispatch: Done
[00:07:40.110,382] <dbg> lte_lc: at_handler_cereg: +CEREG notification: +CEREG: 2,"AE43","00525916",9

[00:07:40.111,175] <dbg> lte_lc_helpers: parse_cereg: Network registration status: 2
[00:07:40.111,755] <dbg> lte_lc_helpers: parse_cereg: LTE mode: 9
[00:07:40.112,274] <dbg> lte_lc_helpers: event_handler_list_dispatch: Dispatching event: type=4
[00:07:40.112,854] <dbg> lte_lc_helpers: event_handler_list_dispatch:  - handler=0x0001EC0D
[00:07:40.113,464] <dbg> lte_lc_helpers: event_handler_list_dispatch:  - handler=0x00013289
LTE cell changed:
mcc=0
mnc=0
id=5396758
tac=44611
earfcn=0
timing_advance=0
measurement_time=0
phys_cell_id=0
rsrp=0
rsrq=0

[00:07:40.114,837] <dbg> lte_lc_helpers: event_handler_list_dispatch: Done
[00:07:40.115,356] <dbg> lte_lc_helpers: event_handler_list_dispatch: Dispatching event: type=5
[00:07:40.115,936] <dbg> lte_lc_helpers: event_handler_list_dispatch:  - handler=0x0001EC0D
[00:07:40.116,516] <dbg> lte_lc_helpers: event_handler_list_dispatch:  - handler=0x00013289
LTE Mode update: NBIOT
[00:07:40.117,248] <dbg> lte_lc_helpers: event_handler_list_dispatch: Done
LTE connection failed, error: -11
Neighbouring Cells: OK

Waiting for LTE connection
LTE connection failed, error: -11
Neighbouring Cells: OK

Waiting for LTE connection
LTE connection failed, error: -11
Neighbouring Cells: %NBRGRSRP: 441,1526,21
OK

Waiting for LTE connection
LTE connection failed, error: -11
Neighbouring Cells: %NBRGRSRP: 441,1526,14
OK

Waiting for LTE connection
LTE connection failed, error: -11
Neighbouring Cells: %NBRGRSRP: 441,1526,17
OK

[00:08:54.023,712] <dbg> lte_lc: at_handler_cereg: +CEREG notification: +CEREG: 2,"AE45","00525C16",9

[00:08:54.024,475] <dbg> lte_lc_helpers: parse_cereg: Network registration status: 2
[00:08:54.025,054] <dbg> lte_lc_helpers: parse_cereg: LTE mode: 9
[00:08:54.025,573] <dbg> lte_lc_helpers: event_handler_list_dispatch: Dispatching event: type=4
[00:08:54.026,153] <dbg> lte_lc_helpers: event_handler_list_dispatch:  - handler=0x0001EC0D
[00:08:54.026,733] <dbg> lte_lc_helpers: event_handler_list_dispatch:  - handler=0x00013289
LTE cell changed:
mcc=0
mnc=0
id=5397526
tac=44613
earfcn=0
timing_advance=0
measurement_time=0
phys_cell_id=0
rsrp=0
rsrq=0

[00:08:54.028,137] <dbg> lte_lc_helpers: event_handler_list_dispatch: Done
[00:10:00.965,332] <dbg> lte_lc: at_handler_cereg: +CEREG notification: +CEREG: 2

[00:10:00.965,972] <dbg> lte_lc_helpers: parse_cereg: Network registration status: 2
[00:10:00.966,552] <dbg> lte_lc_helpers: parse_cereg: LTE mode not found, error code: -22
[00:10:00.967,163] <dbg> lte_lc_helpers: event_handler_list_dispatch: Dispatching event: type=4
[00:10:00.967,742] <dbg> lte_lc_helpers: event_handler_list_dispatch:  - handler=0x0001EC0D
[00:10:00.968,353] <dbg> lte_lc_helpers: event_handler_list_dispatch:  - handler=0x00013289
LTE cell changed:
mcc=0
mnc=0
id=-1
tac=-1
earfcn=0
timing_advance=0
measurement_time=0
phys_cell_id=0
rsrp=0
rsrq=0

[00:10:00.969,696] <dbg> lte_lc_helpers: event_handler_list_dispatch: Done
[00:10:00.970,214] <dbg> lte_lc_helpers: event_handler_list_dispatch: Dispatching event: type=5
[00:10:00.970,794] <dbg> lte_lc_helpers: event_handler_list_dispatch:  - handler=0x0001EC0D
[00:10:00.971,405] <dbg> lte_lc_helpers: event_handler_list_dispatch:  - handler=0x00013289
LTE Mode update: NONE
[00:10:00.972,137] <dbg> lte_lc_helpers: event_handler_list_dispatch: Done
[00:10:01.447,296] <dbg> lte_lc: at_handler_cereg: +CEREG notification: +CEREG: 2,"4301","01B51278",7

[00:10:01.448,059] <dbg> lte_lc_helpers: parse_cereg: Network registration status: 2
[00:10:01.448,638] <dbg> lte_lc_helpers: parse_cereg: LTE mode: 7
[00:10:01.449,157] <dbg> lte_lc_helpers: event_handler_list_dispatch: Dispatching event: type=4
[00:10:01.449,768] <dbg> lte_lc_helpers: event_handler_list_dispatch:  - handler=0x0001EC0D
[00:10:01.450,347] <dbg> lte_lc_helpers: event_handler_list_dispatch:  - handler=0x00013289
LTE cell changed:
mcc=0
mnc=0
id=28643960
tac=17153
earfcn=0
timing_advance=0
measurement_time=0
phys_cell_id=0
rsrp=0
rsrq=0

[00:10:01.451,751] <dbg> lte_lc_helpers: event_handler_list_dispatch: Done
[00:10:01.452,270] <dbg> lte_lc_helpers: event_handler_list_dispatch: Dispatching event: type=5
[00:10:01.452,850] <dbg> lte_lc_helpers: event_handler_list_dispatch:  - handler=0x0001EC0D
[00:10:01.453,430] <dbg> lte_lc_helpers: event_handler_list_dispatch:  - handler=0x00013289
LTE Mode update: LTEM
[00:10:01.454,162] <dbg> lte_lc_helpers: event_handler_list_dispatch: Done
[00:10:51.497,467] <dbg> lte_lc: at_handler_cereg: +CEREG notification: +CEREG: 2

[00:10:51.498,107] <dbg> lte_lc_helpers: parse_cereg: Network registration status: 2
[00:10:51.498,687] <dbg> lte_lc_helpers: parse_cereg: LTE mode not found, error code: -22
[00:10:51.499,298] <dbg> lte_lc_helpers: event_handler_list_dispatch: Dispatching event: type=4
[00:10:51.499,908] <dbg> lte_lc_helpers: event_handler_list_dispatch:  - handler=0x0001EC0D
[00:10:51.500,518] <dbg> lte_lc_helpers: event_handler_list_dispatch:  - handler=0x00013289
LTE cell changed:
mcc=0
mnc=0
id=-1
tac=-1
earfcn=0
timing_advance=0
measurement_time=0
phys_cell_id=0
rsrp=0
rsrq=0

[00:10:51.501,892] <dbg> lte_lc_helpers: event_handler_list_dispatch: Done
[00:10:51.502,410] <dbg> lte_lc_helpers: event_handler_list_dispatch: Dispatching event: type=5
[00:10:51.502,990] <dbg> lte_lc_helpers: event_handler_list_dispatch:  - handler=0x0001EC0D
[00:10:51.503,601] <dbg> lte_lc_helpers: event_handler_list_dispatch:  - handler=0x00013289
LTE Mode update: NONE
[00:10:51.504,333] <dbg> lte_lc_helpers: event_handler_list_dispatch: Done
[00:10:53.774,017] <dbg> lte_lc: at_handler_cereg: +CEREG notification: +CEREG: 4

[00:10:53.774,658] <dbg> lte_lc_helpers: parse_cereg: Network registration status: 4
[00:10:53.775,238] <dbg> lte_lc_helpers: parse_cereg: LTE mode not found, error code: -22
[00:10:53.775,817] <dbg> lte_lc_helpers: event_handler_list_dispatch: Dispatching event: type=0
[00:10:53.776,428] <dbg> lte_lc_helpers: event_handler_list_dispatch:  - handler=0x0001EC0D
[00:10:53.777,008] <dbg> lte_lc_helpers: event_handler_list_dispatch:  - handler=0x00013289
LTE: NW Reg Status: Registration Unknown
[00:10:53.777,801] <dbg> lte_lc_helpers: event_handler_list_dispatch: Done

2. nrf9160dk: 

SEGGER J-Link V7.80d - Real time terminal output
J-Link OB-K22-NordicSemi compiled Nov  7 2022 16:21:34 V1.0, SN=960041224
Process: JLink.exe
*** Booting Zephyr OS build v3.3.99-ncs1 ***
Device pwmleds not found
1 LEDs Found
Location sample started

location_converstion test 1 51.019131: 51° 1' 8.9"N
location_converstion test 2 -51.037731: 51° 2' 15.8"S
location_converstion test 3 -1.626585: 1° 37' 35.7"W
location_converstion test 3 10.626885: 10° 37' 36.8"E
[00:00:00.602,294] <inf> nrf_modem_lib_trace: Trace thread ready
[00:00:00.610,382] <inf> nrf_modem_lib_trace: Trace level override: 2
Modem Battery Voltage: 4930
Modem FW Version: nrf9160_1.3.4
Device IMEI: 351*************
[00:00:00.646,911] <dbg> lte_lc: init_and_config: System mode (7) and preference (0) configured
[00:00:00.649,047] <dbg> lte_lc_helpers: event_handler_list_append_handler: Handler already registered. Nothing to do
[00:00:00.695,983] <dbg> lte_lc: lte_lc_func_mode_set: CFUN monitor callback: 0x1ea65
at_scanf_int failed
SIM is not initialized
 Cause:
No Specific Cause
Waiting for LTE connection
LTE connection fLTE connection failed, error: -11
Neighbouring Cells: OK

Waiting for LTE connection
LTE connection failed, error: -11
Neighbouring Cells: OK

Waiting for LTE connection
LTE connection failed, error: -11
Neighbouring Cells: OK

Waiting for LTE connection
LTE connection failed, error: -11
Neighbouring Cells: OK

Waiting for LTE connection
LTE connection failed, error: -11
Neighbouring Cells: OK

Waiting for LTE connection
LTE connection failed, error: -11
Neighbouring Cells: OK

Waiting for LTE connection
LTE connection failed, error: -11
Neighbouring Cells: OK

Waiting for LTE connection
[00:01:24.512,512] <dbg> lte_lc: at_handler_cereg: +CEREG notification: +CEREG: 2,"4301","01B51278",7

[00:01:24.513,336] <dbg> lte_lc_helpers: parse_cereg: Network registration status: 2
[00:01:24.513,916] <dbg> lte_lc_helpers: parse_cereg: LTE mode: 7
[00:01:24.514,465] <dbg> lte_lc_helpers: event_handler_list_dispatch: Dispatching event: type=0
[00:01:24.515,075] <dbg> lte_lc_helpers: event_handler_list_dispatch:  - handler=0x0001EC0D
[00:01:24.516,113] <dbg> lte_lc_helpers: event_handler_list_dispatch:  - handler=0x00013289
LTE: NW Reg Status: Searching..
[00:01:24.516,906] <dbg> lte_lc_helpers: event_handler_list_dispatch: Done
[00:01:24.517,456] <dbg> lte_lc_helpers: event_handler_list_dispatch: Dispatching event: type=4
[00:01:24.518,035] <dbg> lte_lc_helpers: event_handler_list_dispatch:  - handler=0x0001EC0D
[00:01:24.518,646] <dbg> lte_lc_helpers: event_handler_list_dispatch:  - handler=0x00013289
LTE cell changed:
mcc=0
mnc=0
id=28643960
tac=17153
earfcn=0
timing_advance=0
measurement_time=0
phys_cell_id=0
rsrp=0
rsrq=0

[00:01:24.520,080] <dbg> lte_lc_helpers: event_handler_list_dispatch: Done
[00:01:24.520,599] <dbg> lte_lc_helpers: event_handler_list_dispatch: Dispatching event: type=5
[00:01:24.521,209] <dbg> lte_lc_helpers: event_handler_list_dispatch:  - handler=0x0001EC0D
[00:01:24.521,820] <dbg> lte_lc_helpers: event_handler_list_dispatch:  - handler=0x00013289
LTE Mode update: LTEM
[00:01:24.522,552] <dbg> lte_lc_helpers: event_handler_list_dispatch: Done
[00:01:24.541,320] <dbg> lte_lc: at_handler_cscon: +CSCON notification
[00:01:24.541,961] <dbg> lte_lc_helpers: event_handler_list_dispatch: Dispatching event: type=3
[00:01:24.542,541] <dbg> lte_lc_helpers: event_handler_list_dispatch:  - handler=0x0001EC0D
[00:01:24.543,151] <dbg> lte_lc_helpers: event_handler_list_dispatch:  - handler=0x00013289
LTE: RRC updates info event: Is Connected

[00:01:24.544,006] <dbg> lte_lc_helpers: event_handler_list_dispatch: Done
Neighbouring Cells: OK

PDP context 0 activated
PDP context 0 error, PDN type IPv4 only allowed
[00:01:26.823,455] <dbg> lte_lc: at_handler_cereg: +CEREG notification: +CEREG: 5,"4301","01B51278",7,,,"11100000","11100000"

[00:01:26.824,462] <dbg> lte_lc_helpers: parse_cereg: Network registration status: 5
[00:01:26.825,042] <dbg> lte_lc_helpers: parse_cereg: LTE mode: 7
[00:01:26.825,592] <dbg> lte_lc_helpers: event_handler_list_dispatch: Dispatching event: type=0
[00:01:26.826,202] <dbg> lte_lc_helpers: event_handler_list_dispatch:  - handler=0x0001EC0D
[00:01:26.826,843] <dbg> lte_lc_helpers: event_handler_list_dispatch:  - handler=0x00013289
LTE: NW Reg Status: Registered Roaming
[00:01:26.827,697] <dbg> lte_lc_helpers: event_handler_list_dispatch: Done
[00:01:26.829,193] <dbg> lte_lc_helpers: parse_psm: TAU: 10800 sec, active time: -1 sec
[00:01:26.829,803] <dbg> lte_lc: lte_lc_psm_get: TAU: 10800 sec, active time: -1 sec
[00:01:26.830,444] <dbg> lte_lc_helpers: event_handler_list_dispatch: Dispatching event: type=1
[00:01:26.831,054] <dbg> lte_lc_helpers: event_handler_list_dispatch:  - handler=0x0001EC0D
[00:01:26.831,665] <dbg> lte_lc_helpers: event_handler_list_dispatch:  - handler=0x00013289
LTE: PSM updates info event

[00:01:26.832,397] <dbg> lte_lc_helpers: event_handler_list_dispatch: Done
DT: Obtained NTP

unix-time: 1695044350001
date-time: 2023-09-18T13:39:10.00
[00:01:39.781,555] <dbg> lte_lc: at_handler_cscon: +CSCON notification
[00:01:39.782,165] <dbg> lte_lc_helpers: event_handler_list_dispatch: Dispatching event: type=3
[00:01:39.782,775] <dbg> lte_lc_helpers: event_handler_list_dispatch:  - handler=0x0001EC0D
[00:01:39.783,355] <dbg> lte_lc_helpers: event_handler_list_dispatch:  - handler=0x00013289
LTE: RRC updates info event: Is Idle

[00:01:39.784,149] <dbg> lte_lc_helpers: event_handler_list_dispatch: Done

[Didrik Rokhaug]

So the problem only happens with the custom board, even with a known good SIM card?

Have you had your board reviewed by us?

If not, I recommend that you open a new private ticket where you add your board's schematics, so that we can review them.

Are you able to capture a modem trace from the custom board?

If you don't have any serial ports, you can also send the modem trace over RTT, though you might have to disable application logging over RTT for it to work: https://infocenter.nordicsemi.com/topic/ug_cellular_monitor/UG/cellular_monitor/cellular_mon_rtt_playback.html

[Dushan_cwx]

Hello Didrik, 

Thank you,

I was able to capture the modem trace, still couldn't find a clear indication of where the issue is coming from when loaded in Celullar Monitor.

I have attached the trace, is there anything specific am looking for?

I will create a private ticket shortly and add the schematic as you have suggested.

Thank you,

Best Regards,

Dushan

/cfs-file/__key/communityserver-discussions-components-files/4/RTTLogger_5F00_Channel_5F00_modem_5F00_trace.bin

[Didrik Rokhaug]

Are you using the same .hex file on both both your custom board and the DK?

Or have you created custom board files as well?

I also see that I have forgotten to share the information we found from the modem trace: RX seems to be working fine, but when the modem tries to send it's attach request, it doesn't get a reply from the network. The same happens in both NB-IoT and LTE-M, so we don't think it is a network issue, but that it instead is HW related.

[Dushan_cwx]

Hi Didrik,

Thanks, indeed the logs also seems to point in that direction (there seems to be that the device doesn't give the +CSCON notification as it does with on the DK. It would be helpful to know as to what could be the potential hardware cause for this issue so that we can resolve it, i.e. Could it be with the radio, sim card or power? 

Thank you,

Best Regards,

Dushan