The modem restarts after sending the command AT+CFUN=1

[Yury Morgunov]

Hi, 

When running the at_client example, I send the AT+CFUN=1 command via the LTE link monitor. After a few seconds, the nrf9160 reboots.

I want to say that before my program worked and connected to the server. However, now I cannot even work through at_client. Commands like AT+CGMR work

If I pull out the sim card, the nrf9160 will not restart. What could be the problem?

P.S. I tried to get modem trace but tace collecor is not accepting anything. Are there any other ways to debug this problem?

Modem firmware version - mfw_nrf9160_1.1.0
I use nRF Connect SDK v1.3.0

[Martin Lesund]

Hi Yury,
Please share the full log from LTE Link Monitor.

[Yury Morgunov]

I have enabled the following logs

CONFIG_CONSOLE=y
CONFIG_SERIAL=y
CONFIG_NET_LOG=y
CONFIG_LTE_LINK_CONTROL_LOG_LEVEL_DBG=y
CONFIG_LOG_BLOCK_IN_THREAD=y
CONFIG_AT_CMD_LOG_LEVEL_DBG=y
CONFIG_NET_IF_LOG_LEVEL_DBG=y
CONFIG_UART_MUX_LOG_LEVEL_DBG=y
CONFIG_UART_CONSOLE_LOG_LEVEL_DBG=y
CONFIG_NET_SOCKETS_LOG_LEVEL_DBG=y

and attached a log file - 

Fullscreen 2020-08-11T10_46_44.317Z-log.txt Download

2020-08-11T10:46:44.990Z INFO Application data folder: C:\Users\y.morgunov\AppData\Roaming\nrfconnect\pc-nrfconnect-linkmonitor
2020-08-11T10:46:45.062Z DEBUG App pc-nrfconnect-linkmonitor v1.1.4 official
2020-08-11T10:46:45.062Z DEBUG App path: C:\Users\y.morgunov\.nrfconnect-apps\node_modules\pc-nrfconnect-linkmonitor
2020-08-11T10:46:45.062Z DEBUG nRFConnect 3.4.2 is supported by the app (^3.2.0)
2020-08-11T10:46:45.062Z DEBUG nRFConnect path: C:\Users\y.morgunov\AppData\Local\Programs\nrfconnect\resources\app.asar
2020-08-11T10:46:45.063Z DEBUG HomeDir: C:\Users\y.morgunov
2020-08-11T10:46:45.063Z DEBUG TmpDir: C:\Users\YDBE4~1.MOR\AppData\Local\Temp
2020-08-11T10:46:45.069Z VERBOSE Could not fetch serial number for serial port at COM1
2020-08-11T10:46:45.069Z VERBOSE Could not fetch serial number for serial port at COM20
2020-08-11T10:46:47.031Z INFO Modem port is opened
2020-08-11T10:46:53.736Z DEBUG modem >> AT+CFUN?
2020-08-11T10:46:53.760Z DEBUG modem << +CFUN: 0
2020-08-11T10:46:53.776Z DEBUG modem << OK
2020-08-11T10:46:54.747Z DEBUG modem << [00:00:23.300,659] [0m<dbg> at_cmd.at_write: Sending command AT+CFUN?[0m
2020-08-11T10:46:54.763Z DEBUG modem << [00:00:23.309,326] [0m<dbg> at_cmd.at_cmd_write: Awaiting response for AT+CFUN?[0m
2020-08-11T10:46:54.764Z DEBUG modem << [00:00:23.312,591] [0m<dbg> at_cmd.socket_thread_fn: at_cmd_rx 15 bytes, +CFUN: 0
2020-08-11T10:46:54.766Z DEBUG modem << OK
2020-08-11T10:46:54.769Z DEBUG modem << [0m
2020-08-11T10:46:54.772Z DEBUG modem << [00:00:23.312,622] [0m<dbg> at_cmd.socket_thread_fn: Enqueueing response for sync call[0m
2020-08-11T10:46:54.784Z DEBUG modem << [00:00:23.312,652] [0m<dbg> at_cmd.socket_thread_fn: Writing any pending command[0m
2020-08-11T10:46:54.788Z DEBUG modem << [00:00:23.312,683] [0m<dbg> at_cmd.socket_thread_fn: Listening on socket[0m
2020-08-11T10:47:10.313Z DEBUG modem >> AT+CFUN=1
2020-08-11T10:47:10.384Z DEBUG modem << OK
2020-08-11T10:47:11.354Z DEBUG modem << [00:00:39.876,892] [0m<dbg> at_cmd.at_write: Sending command 
2020-08-11T10:47:11.367Z DEBUG modem << AT+CFUN=1[0m
2020-08-11T10:47:11.373Z DEBUG modem << [00:00:39.885,589] [0m<dbg> at_cmd.at_cmd_write: Awaiting response for 
2020-08-11T10:47:11.376Z DEBUG modem << AT+CFUN=1[0m
2020-08-11T10:47:11.379Z DEBUG modem << [00:00:39.915,618] [0m<dbg> at_cmd.socket_thread_fn: at_cmd_rx 5 bytes, OK
2020-08-11T10:47:11.382Z DEBUG modem << [0m
2020-08-11T10:47:11.397Z DEBUG modem << [00:00:39.915,618] [0m<dbg> at_cmd.socket_thread_fn: Enqueueing response for sync call[0m
2020-08-11T10:47:11.401Z DEBUG modem << [00:00:39.915,679] [0m<dbg> at_cmd.socket_thread_fn: Writing any pending command[0m
2020-08-11T10:47:11.405Z DEBUG modem << [00:00:39.943,786] [0m<dbg> at_cmd.socket_thread_fn: Listening on socket[0m
2020-08-11T10:47:12.481Z DEBUG modem << *** Booting Zephyr OS build v2.3.0-rc1-ncs1-4-ga6a1fb4642fa  ***
2020-08-11T10:47:12.498Z DEBUG modem << Flash regionsDomainPermissions
2020-08-11T10:47:12.503Z DEBUG modem << 00 00 0x00000 0x08000 Securerwxl
2020-08-11T10:47:12.509Z DEBUG modem << 01 31 0x08000 0x100000 Non-Securerwxl
2020-08-11T10:47:12.513Z DEBUG modem << Non-secure callable region 0 placed in flash region 0 with size 32.
2020-08-11T10:47:12.671Z DEBUG modem << SRAM regionDomainPermissions
2020-08-11T10:47:12.685Z DEBUG modem << 00 07 0x00000 0x10000 Securerwxl
2020-08-11T10:47:12.693Z DEBUG modem << 08 31 0x10000 0x40000 Non-Securerwxl
2020-08-11T10:47:12.698Z DEBUG modem << PeripheralDomainStatus
2020-08-11T10:47:12.702Z DEBUG modem << 00 NRF_P0               Non-SecureOK
2020-08-11T10:47:12.706Z DEBUG modem << 01 NRF_CLOCK            Non-SecureOK
2020-08-11T10:47:12.710Z DEBUG modem << 02 NRF_RTC0             Non-SecureOK
2020-08-11T10:47:12.732Z DEBUG modem << 03 NRF_RTC1             Non-SecureOK
2020-08-11T10:47:12.736Z DEBUG modem << 04 NRF_NVMC             Non-SecureOK
2020-08-11T10:47:12.739Z DEBUG modem << 05 NRF_UARTE1           Non-SecureOK
2020-08-11T10:47:12.741Z DEBUG modem << 06 NRF_UARTE2           SecureSKIP
2020-08-11T10:47:12.744Z DEBUG modem << 07 NRF_TWIM2            Non-SecureOK
2020-08-11T10:47:12.747Z DEBUG modem << 08 NRF_SPIM3            Non-SecureOK
2020-08-11T10:47:12.750Z DEBUG modem << 09 NRF_TIMER0           Non-SecureOK
2020-08-11T10:47:12.755Z DEBUG modem << 10 NRF_TIMER1           Non-SecureOK
2020-08-11T10:47:12.756Z DEBUG modem << 11 NRF_TIMER2           Non-SecureOK
2020-08-11T10:47:12.764Z DEBUG modem << 12 NRF_SAADC            Non-SecureOK
2020-08-11T10:47:12.766Z DEBUG modem << 13 NRF_PWM0             Non-SecureOK
2020-08-11T10:47:12.767Z DEBUG modem << 14 NRF_PWM1             Non-SecureOK
2020-08-11T10:47:12.768Z DEBUG modem << 15 NRF_PWM2             Non-SecureOK
2020-08-11T10:47:12.770Z DEBUG modem << 16 NRF_PWM3             Non-SecureOK
2020-08-11T10:47:12.771Z DEBUG modem << 17 NRF_WDT              Non-SecureOK
2020-08-11T10:47:12.772Z DEBUG modem << 18 NRF_IPC              Non-SecureOK
2020-08-11T10:47:12.774Z DEBUG modem << 19 NRF_VMC              Non-SecureOK
2020-08-11T10:47:12.776Z DEBUG modem << 20 NRF_FPU              Non-SecureOK
2020-08-11T10:47:12.777Z DEBUG modem << 21 NRF_EGU1             Non-SecureOK
2020-08-11T10:47:12.785Z DEBUG modem << 22 NRF_EGU2             Non-SecureOK
2020-08-11T10:47:12.786Z DEBUG modem << 23 NRF_DPPIC            Non-SecureOK
2020-08-11T10:47:12.786Z DEBUG modem << 24 NRF_GPIOTE1          Non-SecureOK
2020-08-11T10:47:12.787Z DEBUG modem << 25 NRF_REGULATORS       Non-SecureOK
2020-08-11T10:47:12.787Z DEBUG modem << SPM: NS image at 0xc000
2020-08-11T10:47:12.788Z DEBUG modem << SPM: NS MSP at 0x2003b098
2020-08-11T10:47:12.789Z DEBUG modem << SPM: NS reset vector at 0xdf9d
2020-08-11T10:47:12.790Z DEBUG modem << SPM: prepare to jump to Non-Secure image.
2020-08-11T10:47:13.015Z DEBUG modem << *** Booting Zephyr OS build v2.3.0-rc1-ncs1-4-ga6a1fb4642fa  ***
2020-08-11T10:47:13.031Z DEBUG modem << The AT host sample started
2020-08-11T10:47:13.036Z DEBUG modem << [00:00:00.226,928] [0m<dbg> net_if.net_if_init: (0x20020cec): [0m
2020-08-11T10:47:13.041Z DEBUG modem << [00:00:00.226,959] [0m<dbg> net_if.init_iface: (0x20020cec): On iface 0x200201e0[0m
2020-08-11T10:47:13.046Z DEBUG modem << [00:00:00.226,959] [0m<dbg> net_if.net_if_post_init: (0x20020cec): [0m
2020-08-11T10:47:13.060Z DEBUG modem << [00:00:00.226,959] [0m<dbg> net_if.net_if_up: (0x20020cec): iface 0x200201e0[0m
2020-08-11T10:47:13.065Z DEBUG modem << [00:00:00.240,112] [0m<dbg> at_cmd.at_cmd_driver_init: Common AT socket created[0m
2020-08-11T10:47:13.071Z DEBUG modem << [00:00:00.240,142] [0m<dbg> at_cmd.at_cmd_driver_init: Common AT socket processing thread created[0m
2020-08-11T10:47:13.085Z DEBUG modem << [00:00:00.240,142] [0m<dbg> at_cmd.at_cmd_set_notification_handler: Setting notification handler to 0x000110a5[0m
2020-08-11T10:47:13.089Z DEBUG modem << [00:00:00.242,736] [0m<dbg> at_cmd.socket_thread_fn: AT socket thread started[0m
2020-08-11T10:47:13.101Z DEBUG modem << [00:00:00.242,736] [0m<dbg> at_cmd.socket_thread_fn: Writing any pending command[0m
2020-08-11T10:47:13.104Z DEBUG modem << [00:00:00.242,767] [0m<dbg> at_cmd.socket_thread_fn: Listening on socket[0m