- Hi Team,
We have a custom board with nRF9151 SoC that shows complete RF failure. The modem initializes correctly and detects the SIM card, but cannot detect any RF signal or register to any cellular network.
Symptoms:
-
Persistent registration failure:
+CEREG: 5,4(unknown/out of coverage) -
No RF signal detected:
+CESQ: 99,99,255,255,255,255(all values indicate "not detectable") -
No bands detected:
%XCBAND: 0 -
Network scan returns empty:
AT+COPS=?returns no networks after 5-minute scan
Configuration:
-
System mode:
AT%XSYSTEMMODE=1,0,1,0(LTE-M and NB-IoT enabled) -
APN:
jionpiot(Jio network, India) -
SIM: Jio - confirmed active and working (checked with network provider)
Complete Diagnostic Log:
SEGGER J-Link V8.18 - Real time terminal output SEGGER J-Link V9.6, SN=63631070 Process: JLink.exe *** Booting nRF Connect SDK v3.0.0-3bfc46578e42 *** *** Using Zephyr OS v4.0.99-3e0ce7636fa6 *** === nRF9151 Network Diagnostic Tool === [00:00:00.629,577] <inf> main: Modem initialized successfully [00:00:00.652,069] <inf> main: CFUN=0: OK [00:00:00.659,149] <inf> main: Firmware version: mfw_nrf91x1_2.0.2 OK [00:00:00.666,595] <inf> main: System mode: OK [00:00:00.673,736] <inf> main: APN config: OK [00:00:00.680,816] <inf> main: CEREG subscription: OK [00:00:00.687,957] <inf> main: Band configuration: %XCBAND: 0 OK [00:00:00.736,328] <inf> main: CFUN=1: OK [00:00:00.736,358] <inf> main: Waiting for SIM initialization... [00:00:03.737,060] <inf> main: SIM PIN status: +CPIN: READY OK [00:00:03.737,762] <inf> main: SIM state: %XSIM: 1 OK [00:00:03.738,616] <inf> main: ICCID: %XICCID: 89918740106001997417 OK [00:00:03.739,318] <inf> main: Signal quality: +CESQ: 99,99,255,255,255,255 OK [00:00:03.739,318] <inf> main: === Scanning for networks (this takes 2-3 minutes) === [00:04:57.680,847] <inf> main: Available networks: +COPS: OK [00:04:57.680,877] <inf> main: === Waiting for network registration === [00:04:59.687,713] <inf> main: [0] Registration: +CEREG: 5,4 OK [00:04:59.694,549] <inf> main: Signal quality: +CESQ: 99,99,255,255,255,255 OK [00:05:01.701,416] <inf> main: [1] Registration: +CEREG: 5,4 OK [00:05:01.701,477] <wrn> main: Registration unknown/out of coverage [00:05:03.708,312] <inf> main: [2] Registration: +CEREG: 5,4 OK [00:05:03.708,374] <wrn> main: Registration unknown/out of coverage [00:05:05.715,209] <inf> main: [3] Registration: +CEREG: 5,4 OK [00:05:05.715,270] <wrn> main: Registration unknown/out of coverage [00:05:07.722,106] <inf> main: [4] Registration: +CEREG: 5,4 OK [00:05:07.722,167] <wrn> main: Registration unknown/out of coverage [00:05:09.723,083] <inf> main: [5] Registration: +CEREG: 5,4 OK [00:05:09.724,273] <inf> main: Signal quality: +CESQ: 99,99,255,255,255,255 OK [00:05:11.725,067] <inf> main: [6] Registration: +CEREG: 5,4 OK [00:05:11.725,128] <wrn> main: Registration unknown/out of coverage [00:05:13.725,891] <inf> main: [7] Registration: +CEREG: 5,4 OK [00:05:13.725,952] <wrn> main: Registration unknown/out of coverage [00:05:15.726,715] <inf> main: [8] Registration: +CEREG: 5,4 OK [00:05:15.726,776] <wrn> main: Registration unknown/out of coverage [00:05:17.727,539] <inf> main: [9] Registration: +CEREG: 5,4 OK [00:05:17.727,600] <wrn> main: Registration unknown/out of coverage [00:05:19.728,668] <inf> main: [10] Registration: +CEREG: 5,4 OK [00:05:19.729,431] <inf> main: Signal quality: +CESQ: 99,99,255,255,255,255 OK [00:05:21.730,346] <inf> main: [11] Registration: +CEREG: 5,4 OK [00:05:21.730,407] <wrn> main: Registration unknown/out of coverage [00:05:23.731,170] <inf> main: [12] Registration: +CEREG: 5,4 OK [00:05:23.731,231] <wrn> main: Registration unknown/out of coverage [00:05:25.731,994] <inf> main: [13] Registration: +CEREG: 5,4 OK [00:05:25.732,055] <wrn> main: Registration unknown/out of coverage [00:05:27.732,818] <inf> main: [14] Registration: +CEREG: 5,4 OK [00:05:27.732,879] <wrn> main: Registration unknown/out of coverage [00:05:29.733,642] <inf> main: [15] Registration: +CEREG: 5,4 OK [00:05:29.734,375] <inf> main: Signal quality: +CESQ: 99,99,255,255,255,255 OK [00:05:31.735,168] <inf> main: [16] Registration: +CEREG: 5,4 OK [00:05:31.735,229] <wrn> main: Registration unknown/out of coverage [00:05:33.735,992] <inf> main: [17] Registration: +CEREG: 5,4 OK [00:05:33.736,053] <wrn> main: Registration unknown/out of coverage [00:05:35.736,938] <inf> main: [18] Registration: +CEREG: 5,4 OK [00:05:35.736,968] <wrn> main: Registration unknown/out of coverage [00:05:37.737,731] <inf> main: [19] Registration: +CEREG: 5,4 OK [00:05:37.737,792] <wrn> main: Registration unknown/out of coverage [00:05:39.738,555] <inf> main: [20] Registration: +CEREG: 5,4 OK [00:05:39.739,288] <inf> main: Signal quality: +CESQ: 99,99,255,255,255,255 OK [00:05:41.740,081] <inf> main: [21] Registration: +CEREG: 5,4 OK [00:05:41.740,142] <wrn> main: Registration unknown/out of coverage [00:05:43.740,936] <inf> main: [22] Registration: +CEREG: 5,4 OK [00:05:43.740,997] <wrn> main: Registration unknown/out of coverage [00:05:45.741,760] <inf> main: [23] Registration: +CEREG: 5,4 OK [00:05:45.741,821] <wrn> main: Registration unknown/out of coverage [00:05:47.742,553] <inf> main: [24] Registration: +CEREG: 5,4 OK [00:05:47.742,614] <wrn> main: Registration unknown/out of coverage [00:05:49.743,377] <inf> main: [25] Registration: +CEREG: 5,4 OK [00:05:49.744,110] <inf> main: Signal quality: +CESQ: 99,99,255,255,255,255 OK [00:05:51.744,934] <inf> main: [26] Registration: +CEREG: 5,4 OK [00:05:51.744,995] <wrn> main: Registration unknown/out of coverage [00:05:53.745,727] <inf> main: [27] Registration: +CEREG: 5,4 OK [00:05:53.745,788] <wrn> main: Registration unknown/out of coverage [00:05:55.746,551] <inf> main: [28] Registration: +CEREG: 5,4 OK [00:05:55.746,612] <wrn> main: Registration unknown/out of coverage [00:05:57.753,448] <inf> main: [29] Registration: +CEREG: 5,4 OK [00:05:57.753,509] <wrn> main: Registration unknown/out of coverage [00:05:59.760,345] <inf> main: [30] Registration: +CEREG: 5,4 OK [00:05:59.767,150] <inf> main: Signal quality: +CESQ: 99,99,255,255,255,255 OK [00:06:01.774,017] <inf> main: [31] Registration: +CEREG: 5,4 OK [00:06:01.774,078] <wrn> main: Registration unknown/out of coverage [00:06:03.780,914] <inf> main: [32] Registration: +CEREG: 5,4 OK [00:06:03.780,975] <wrn> main: Registration unknown/out of coverage [00:06:05.787,811] <inf> main: [33] Registration: +CEREG: 5,4 OK [00:06:05.787,872] <wrn> main: Registration unknown/out of coverage [00:06:07.794,708] <inf> main: [34] Registration: +CEREG: 5,4 OK [00:06:07.794,769] <wrn> main: Registration unknown/out of coverage [00:06:09.801,605] <inf> main: [35] Registration: +CEREG: 5,4 OK [00:06:09.808,410] <inf> main: Signal quality: +CESQ: 99,99,255,255,255,255 OK [00:06:11.815,277] <inf> main: [36] Registration: +CEREG: 5,4 OK [00:06:11.815,338] <wrn> main: Registration unknown/out of coverage [00:06:13.822,174] <inf> main: [37] Registration: +CEREG: 5,4 OK [00:06:13.822,235] <wrn> main: Registration unknown/out of coverage [00:06:15.829,071] <inf> main: [38] Registration: +CEREG: 5,4 OK [00:06:15.829,132] <wrn> main: Registration unknown/out of coverage [00:06:17.835,968] <inf> main: [39] Registration: +CEREG: 5,4 OK [00:06:17.836,029] <wrn> main: Registration unknown/out of coverage [00:06:19.842,864] <inf> main: [40] Registration: +CEREG: 5,4 OK [00:06:19.849,670] <inf> main: Signal quality: +CESQ: 99,99,255,255,255,255 OK [00:06:21.856,536] <inf> main: [41] Registration: +CEREG: 5,4 OK [00:06:21.856,597] <wrn> main: Registration unknown/out of coverage [00:06:23.863,433] <inf> main: [42] Registration: +CEREG: 5,4 OK [00:06:23.863,494] <wrn> main: Registration unknown/out of coverage [00:06:25.870,330] <inf> main: [43] Registration: +CEREG: 5,4 OK [00:06:25.870,391] <wrn> main: Registration unknown/out of coverage [00:06:27.877,227] <inf> main: [44] Registration: +CEREG: 5,4 OK [00:06:27.877,288] <wrn> main: Registration unknown/out of coverage [00:06:29.884,124] <inf> main: [45] Registration: +CEREG: 5,4 OK [00:06:29.890,930] <inf> main: Signal quality: +CESQ: 99,99,255,255,255,255 OK [00:06:31.897,796] <inf> main: [46] Registration: +CEREG: 5,4 OK [00:06:31.897,857] <wrn> main: Registration unknown/out of coverage [00:06:33.904,693] <inf> main: [47] Registration: +CEREG: 5,4 OK [00:06:33.904,754] <wrn> main: Registration unknown/out of coverage [00:06:35.905,517] <inf> main: [48] Registration: +CEREG: 5,4 OK [00:06:35.905,578] <wrn> main: Registration unknown/out of coverage [00:06:37.906,341] <inf> main: [49] Registration: +CEREG: 5,4 OK [00:06:37.906,402] <wrn> main: Registration unknown/out of coverage [00:06:39.907,165] <inf> main: [50] Registration: +CEREG: 5,4 OK [00:06:39.908,020] <inf> main: Signal quality: +CESQ: 99,99,255,255,255,255 OK [00:06:41.908,813] <inf> main: [51] Registration: +CEREG: 5,4 OK [00:06:41.908,874] <wrn> main: Registration unknown/out of coverage [00:06:43.909,637] <inf> main: [52] Registration: +CEREG: 5,4 OK [00:06:43.909,698] <wrn> main: Registration unknown/out of coverage [00:06:45.910,461] <inf> main: [53] Registration: +CEREG: 5,4 OK [00:06:45.910,522] <wrn> main: Registration unknown/out of coverage [00:06:47.911,285] <inf> main: [54] Registration: +CEREG: 5,4 OK [00:06:47.911,346] <wrn> main: Registration unknown/out of coverage [00:06:49.912,109] <inf> main: [55] Registration: +CEREG: 5,4 OK [00:06:49.912,902] <inf> main: Signal quality: +CESQ: 99,99,255,255,255,255 OK [00:06:51.913,696] <inf> main: [56] Registration: +CEREG: 5,4 OK [00:06:51.913,757] <wrn> main: Registration unknown/out of coverage [00:06:53.914,520] <inf> main: [57] Registration: +CEREG: 5,4 OK [00:06:53.914,581] <wrn> main: Registration unknown/out of coverage [00:06:55.915,344] <inf> main: [58] Registration: +CEREG: 5,4 OK [00:06:55.915,405] <wrn> main: Registration unknown/out of coverage [00:06:57.916,168] <inf> main: [59] Registration: +CEREG: 5,4 OK [00:06:57.916,229] <wrn> main: Registration unknown/out of coverage [00:06:57.916,229] <err> main: === FAILED TO REGISTER AFTER 60 ATTEMPTS === [00:06:57.916,259] <err> main: Possible causes: [00:06:57.916,259] <err> main: 1. Antenna or RF matching issue [00:06:57.916,290] <err> main: 2. MAGPIO configuration problem [00:06:57.916,290] <err> main: 3. Band configuration mismatch [00:06:57.916,320] <err> main: 4. Hardware fault in RF section [00:06:57.917,022] <inf> main: Final signal check: +CESQ: 99,99,255,255,255,255 OK [00:06:57.917,724] <inf> main: Final band check: %XCBAND: 0 OK [00:06:57.917,785] <inf> main: === Diagnostic complete ===
We even tested the code on nrf9161dk but still observed the same issue as mentioned above.
Attaching the code that we are using for the test. Please guide us how do we proceed further.
Our goal is to transmit data received over uart from another SoC (nrf54l15) to nrf9151 which should send it to the server over mqtt using the sim.
Thanks,
Vivek
