Hi,
My name is Alexandre and I am currently working on a GNSS tracker project.
I want to use the nRF9160 to connect to LTE-M network only and I am using an external GNSS for tracking.
I started on a devkit with the SLM app and everything works fine, I can connect and register to the network and send HTTP requests using LTE monitor.
Now I am switching to my custom board using the same SIM where the nRF9160 is used as a modem only component controlled by an ESP32 and I cannot register to the network.
You can the log file attached. I tried to replicate the same AT command sequence as the LTE monitor with "automatic requests" enabled.
The problem could come from the hardware as this is the first version of the board and antenna impedance has not be matched yet (only 0R resistor between MCU and antenna). You can find attached an extract of the schematic.
But it could also come from the software as I am not yet really familiar with nRF Connect SDK and Zephyr (Github link to project)
I really don't know where to start searching in order to identify the root cause of the issue.
Any help or advise would be appreciated. Thanks.
Regards
3005.custom_nRF9160_board_schematic.pdf
[15:39:02] >>> AT [15:39:03] <<< OK [15:39:20] >>> AT%XSYSTEMMODE=1,0,0,1 [15:39:21] <<< OK [15:39:26] >>> AT+CFUN? [15:39:26] <<< +CFUN: 0 [15:39:26] <<< OK [15:39:38] >>> AT+CGSN=1 [15:39:38] <<< +CGSN: "351358814861545" [15:39:38] <<< OK [15:39:41] >>> AT+CGMI [15:39:42] <<< Nordic Semiconductor ASA [15:39:42] <<< OK [15:39:46] >>> AT+CGMM [15:39:46] <<< nRF9160-SICA [15:39:46] <<< OK [15:39:49] >>> AT+CGMR [15:39:50] <<< mfw_nrf9160_1.2.0 [15:39:50] <<< OK [15:39:54] >>> AT+CEMODE? [15:39:54] <<< +CEMODE: 2 [15:39:54] <<< OK [15:39:58] >>> AT%XCBAND=? [15:39:58] <<< %XCBAND: (1,2,3,4,5,8,12,13,17,18,19,20,25,26,28,66) [15:39:58] <<< OK [15:40:04] >>> AT+CMEE? [15:40:04] <<< +CMEE: 0 [15:40:04] <<< OK [15:40:07] >>> AT+CMEE=1 [15:40:08] <<< OK [15:40:13] >>> AT+CNEC=24 [15:40:13] <<< OK [15:40:19] >>> AT+CGEREP? [15:40:19] <<< +CGEREP: 0,0 [15:40:19] <<< OK [15:40:23] >>> AT+CGDCONT? [15:40:24] <<< OK [15:40:34] >>> AT+CGDCONT=0,"IP","hologram" [15:40:35] <<< OK [15:40:42] >>> AT+CGDCONT? [15:40:42] <<< +CGDCONT: 0,"IP","hologram","",0,0 [15:40:42] <<< OK [15:40:49] >>> AT+CGACT? [15:40:50] <<< +CGACT: 0,0 [15:40:50] <<< OK [15:40:58] >>> AT+CGEREP=1 [15:40:59] <<< OK [15:41:02] >>> AT+CIND=1,1,1 [15:41:03] <<< OK [15:41:07] >>> AT+CEREG=5 [15:41:07] <<< OK [15:41:20] >>> AT%CESQ=1 [15:41:20] <<< OK [15:41:37] >>> AT+COPS=3,2 [15:41:38] <<< OK [15:42:09] >>> AT+COPS? [15:42:09] <<< +COPS: 0 [15:42:09] <<< OK [15:42:18] >>> AT+CFUN=1 [15:42:21] <<< OK [15:42:25] >>> AT+COPS? [15:42:26] <<< +COPS: 0 [15:42:26] <<< OK [15:42:41] >>> AT+CPIN? [15:42:43] <<< +CPIN: READY [15:42:43] <<< OK [15:42:48] >>> AT+CPINR="SIM PIN" [15:42:49] <<< +CPINR: "SIM PIN",3 [15:42:49] <<< OK [15:42:57] >>> AT+CIMI [15:42:57] <<< 234500007347745 [15:42:57] <<< OK [15:43:23] <<< %CESQ: 26,1,20,2 [15:43:23] <<< +CEREG: 2,"C163","00005A06",7,0,0,"11100000","11100000" [15:43:28] <<< %CESQ: 26,1,14,2 [15:43:35] >>> AT+COPS? [15:43:36] <<< +COPS: 0 [15:43:36] <<< OK [15:43:58] <<< +CEREG: 2,"FFFE","FFFFFFFF",7,0,0,"11100000","11100000" [15:44:06] <<< +CEREG: 2,"0004","00BABE04",7,0,0,"11100000","11100000" [15:44:10] <<< %CESQ: 21,1,14,2 [15:44:32] <<< +CEREG: 2,"FFFE","FFFFFFFF",7,0,0,"11100000","11100000" [15:44:35] <<< %CESQ: 255,0,255,0 [15:44:52] <<< %CESQ: 9,0,0,0 [15:44:52] <<< +CEREG: 2,"0004","00999A04",7,0,0,"11100000","11100000" [15:44:55] <<< %CESQ: 15,0,0,0 [15:44:56] <<< %CESQ: 15,0,5,0 [15:45:49] <<< %CESQ: 15,0,0,0 [15:45:58] <<< %CESQ: 15,0,5,0 [15:46:41] <<< %CESQ: 15,0,0,0 [15:46:50] <<< %CESQ: 15,0,5,0 [15:47:03] <<< %CESQ: 7,0,20,2 [15:47:04] <<< %CESQ: 14,0,3,0 [15:47:43] <<< %CESQ: 14,0,8,1 [15:48:14] <<< %CESQ: 14,0,2,0 [15:48:26] <<< %CESQ: 14,0,7,1 [15:48:39] <<< %CESQ: 14,0,2,0 [15:48:53] <<< %CESQ: 14,0,7,1 [15:49:25] <<< %CESQ: 14,0,2,0 [15:49:27] <<< %CESQ: 14,0,7,1 [15:50:35] <<< %CESQ: 19,0,13,1
