No response to AT

I got up to this stage while trying to evaluate the module...

https://infocenter.nordicsemi.com/index.jsp?topic=%2Fug_nrf91_dk_gsg%2FUG%2Fnrf91_DK_gsg%2Fintro.html

There is no response to AT+CFUN=4 (or even AT). I successfully updated the modem and application FW to the latest prior to this. I have tried switching the board on/off, etc. without success.

  • Hi,

    What application are you running on the nRF91?

    What are you using to send the AT comand?

    Do you get any log from the device?

    Best regards,

    Didrik

  • I'm following the getting started guide for the dev kit. Terminal app in nRF Connect v3.7.1.

  • And what application are you running on the nRF91?
    And do you get any logs from the device?

  • Sorry, this is my first exposure to your device and environment. I don't know what logs you are referring to, but I got these from the nRF Connect application. I am following the getting started guide here https://infocenter.nordicsemi.com/topic/ug_nrf91_dk_gsg/UG/nrf91_DK_gsg/intro.html?cp=2_0_4

    Can't seem to get your system to allow me to insert a file, so pasting here...

    2021-09-13T23:06:33.612Z INFO Application data folder: C:\Users\SLightbody\AppData\Roaming\nrfconnect\pc-nrfconnect-programmer
    2021-09-13T23:06:33.690Z DEBUG App pc-nrfconnect-programmer v1.4.11 official
    2021-09-13T23:06:33.690Z DEBUG App path: C:\Users\SLightbody\.nrfconnect-apps\node_modules\pc-nrfconnect-programmer
    2021-09-13T23:06:33.690Z DEBUG nRFConnect 3.7.1, required by the app is (^3.6.0)
    2021-09-13T23:06:33.690Z DEBUG nRFConnect path: C:\Users\SLightbody\AppData\Local\Programs\nrfconnect\resources\app.asar
    2021-09-13T23:06:33.690Z DEBUG HomeDir: C:\Users\SLightbody
    2021-09-13T23:06:33.690Z DEBUG TmpDir: C:\Users\SLIGHT~1\AppData\Local\Temp
    2021-09-13T23:06:33.702Z INFO Using nrfjprog library 10.12.1, pc-nrfjprog-js 1.7.6
    2021-09-13T23:06:34.627Z VERBOSE Could not fetch serial number for serial port at COM9
    2021-09-13T23:06:34.627Z VERBOSE Could not fetch serial number for serial port at COM8
    2021-09-13T23:06:34.627Z VERBOSE Could not fetch serial number for serial port at COM3
    2021-09-13T23:06:34.627Z VERBOSE Could not fetch serial number for serial port at COM1
    2021-09-13T23:06:34.627Z VERBOSE Could not fetch serial number for serial port at COM12
    2021-09-13T23:06:34.627Z VERBOSE Could not fetch serial number for serial port at COM11
    2021-09-13T23:06:34.627Z VERBOSE Could not fetch serial number for serial port at COM4
    2021-09-13T23:11:41.220Z INFO Using nrfjprog to communicate with target
    2021-09-13T23:11:45.614Z INFO Using J-Link Software version 6.88
    2021-09-13T23:11:46.050Z INFO Segger serial:  960013375
    2021-09-13T23:11:46.050Z INFO Segger speed:  2000  kHz
    2021-09-13T23:11:46.050Z INFO Segger version:  J-Link OB-K22-NordicSemi compiled Jan 21 2020 17:33:01
    2021-09-13T23:11:46.050Z INFO Core probed: 960013375
    2021-09-13T23:11:46.050Z INFO Core RAM: 256KiB
    2021-09-13T23:11:46.050Z INFO Core ROM: 1024KiB in pages of 4KiB
    2021-09-13T23:11:46.319Z INFO Model: NRF9160_xxAA_REV1.
    2021-09-13T23:11:46.900Z INFO Core0: Reading device non-volatile memory. This may take a few seconds.
    2021-09-13T23:11:47.547Z INFO Core0: UICR has been read. Click read button to read full non-volatile memory.
    2021-09-13T23:13:15.923Z INFO Using nrfjprog to communicate with target
    2021-09-13T23:13:16.509Z INFO Using J-Link Software version 6.88
    2021-09-13T23:13:17.014Z INFO Segger serial:  960013375
    2021-09-13T23:13:17.014Z INFO Segger speed:  2000  kHz
    2021-09-13T23:13:17.014Z INFO Segger version:  J-Link OB-K22-NordicSemi compiled Jan 21 2020 17:33:01
    2021-09-13T23:13:17.015Z INFO Core probed: 960013375
    2021-09-13T23:13:17.015Z INFO Core RAM: 256KiB
    2021-09-13T23:13:17.015Z INFO Core ROM: 1024KiB in pages of 4KiB
    2021-09-13T23:13:17.280Z INFO Model: NRF9160_xxAA_REV1.
    2021-09-13T23:13:17.784Z INFO Core0: Reading device non-volatile memory. This may take a few seconds.
    2021-09-13T23:13:18.445Z INFO Core0: UICR has been read. Click read button to read full non-volatile memory.
    2021-09-13T23:13:39.930Z INFO Using nrfjprog to communicate with target
    2021-09-13T23:13:40.323Z INFO Using J-Link Software version 6.88
    2021-09-13T23:13:40.699Z INFO Segger serial:  960013375
    2021-09-13T23:13:40.700Z INFO Segger speed:  2000  kHz
    2021-09-13T23:13:40.700Z INFO Segger version:  J-Link OB-K22-NordicSemi compiled Jan 21 2020 17:33:01
    2021-09-13T23:13:40.700Z INFO Core probed: 960013375
    2021-09-13T23:13:40.700Z INFO Core RAM: 256KiB
    2021-09-13T23:13:40.700Z INFO Core ROM: 1024KiB in pages of 4KiB
    2021-09-13T23:13:40.977Z INFO Model: NRF9160_xxAA_REV1.
    2021-09-13T23:13:41.518Z INFO Core0: Reading device non-volatile memory. This may take a few seconds.
    2021-09-13T23:13:51.037Z INFO Core0: Non-volatile memory has been read. 3 non-empty memory blocks identified
    2021-09-13T23:15:16.937Z INFO Parsing HEX file:  D:\DriveOne1\OneDrive - LED Roadway Lighting Ltd\Designs\IntCellCntrl\Nordic\img_fota_dfu_hex\nrf9160dk_asset_tracker_ltem_2021-06-25_7a076c22.hex
    2021-09-13T23:15:16.949Z INFO File was last modified at  9/13/2021, 4:10:31 PM
    2021-09-13T23:15:26.353Z INFO Recovery procedure finished
    2021-09-13T23:15:26.371Z INFO Using nrfjprog to communicate with target
    2021-09-13T23:15:26.887Z INFO Using J-Link Software version 6.88
    2021-09-13T23:15:27.369Z INFO Segger serial:  960013375
    2021-09-13T23:15:27.369Z INFO Segger speed:  2000  kHz
    2021-09-13T23:15:27.369Z INFO Segger version:  J-Link OB-K22-NordicSemi compiled Jan 21 2020 17:33:01
    2021-09-13T23:15:27.369Z INFO Core probed: 960013375
    2021-09-13T23:15:27.370Z INFO Core RAM: 256KiB
    2021-09-13T23:15:27.370Z INFO Core ROM: 1024KiB in pages of 4KiB
    2021-09-13T23:15:27.614Z INFO Model: NRF9160_xxAA_REV1.
    2021-09-13T23:15:28.133Z INFO Core0: Reading device non-volatile memory. This may take a few seconds.
    2021-09-13T23:15:28.779Z INFO Core0: UICR has been read. Click read button to read full non-volatile memory.
    2021-09-13T23:15:28.904Z INFO Writing procedure starts for core0
    2021-09-13T23:15:43.309Z INFO Write procedure finished
    2021-09-13T23:15:43.314Z INFO Using nrfjprog to communicate with target
    2021-09-13T23:15:43.875Z INFO Using J-Link Software version 6.88
    2021-09-13T23:15:44.367Z INFO Segger serial:  960013375
    2021-09-13T23:15:44.368Z INFO Segger speed:  2000  kHz
    2021-09-13T23:15:44.368Z INFO Segger version:  J-Link OB-K22-NordicSemi compiled Jan 21 2020 17:33:01
    2021-09-13T23:15:44.368Z INFO Core probed: 960013375
    2021-09-13T23:15:44.368Z INFO Core RAM: 256KiB
    2021-09-13T23:15:44.368Z INFO Core ROM: 1024KiB in pages of 4KiB
    2021-09-13T23:15:44.616Z INFO Model: NRF9160_xxAA_REV1.
    2021-09-13T23:15:45.124Z INFO Core0: Reading device non-volatile memory. This may take a few seconds.
    2021-09-13T23:15:45.791Z INFO Core0: UICR has been read. Click read button to read full non-volatile memory.
    2021-09-13T23:15:49.740Z INFO Using nrfjprog to communicate with target
    2021-09-13T23:15:50.237Z INFO Using J-Link Software version 6.88
    2021-09-13T23:15:50.718Z INFO Segger serial:  960013375
    2021-09-13T23:15:50.718Z INFO Segger speed:  2000  kHz
    2021-09-13T23:15:50.718Z INFO Segger version:  J-Link OB-K22-NordicSemi compiled Jan 21 2020 17:33:01
    2021-09-13T23:15:50.718Z INFO Core probed: 960013375
    2021-09-13T23:15:50.718Z INFO Core RAM: 256KiB
    2021-09-13T23:15:50.718Z INFO Core ROM: 1024KiB in pages of 4KiB
    2021-09-13T23:15:50.963Z INFO Model: NRF9160_xxAA_REV1.
    2021-09-13T23:15:51.518Z INFO Core0: Reading device non-volatile memory. This may take a few seconds.
    2021-09-13T23:16:01.006Z INFO Core0: Non-volatile memory has been read. 4 non-empty memory blocks identified
    2021-09-13T23:17:33.523Z INFO Modem DFU starts to write...
    2021-09-13T23:17:33.523Z INFO Writing D:\DriveOne1\OneDrive - LED Roadway Lighting Ltd\Designs\IntCellCntrl\Nordic\mfw_nrf9160_1.3.0.zip to device 960013375
    2021-09-13T23:17:34.804Z INFO Checking for newer bootloader.
    2021-09-13T23:17:34.805Z INFO Newer bootloader discovered, re-initializing.
    2021-09-13T23:17:34.978Z INFO Programming file 0 of 2 files.
    2021-09-13T23:17:34.990Z INFO Programming 1 of 1 segments.
    2021-09-13T23:17:35.060Z INFO Programming finished.

    2021-09-13T23:17:35.061Z INFO Programming file 1 of 2 files.
    2021-09-13T23:17:35.936Z INFO Programming 1 of 32 segments.
    2021-09-13T23:17:36.808Z INFO Programming 2 of 32 segments.
    2021-09-13T23:17:38.271Z INFO Programming 3 of 32 segments.
    2021-09-13T23:17:39.756Z INFO Programming 4 of 32 segments.
    2021-09-13T23:17:41.231Z INFO Programming 5 of 32 segments.
    2021-09-13T23:17:42.695Z INFO Programming 6 of 32 segments.
    2021-09-13T23:17:44.174Z INFO Programming 7 of 32 segments.
    2021-09-13T23:17:45.650Z INFO Programming 8 of 32 segments.
    2021-09-13T23:17:47.124Z INFO Programming 9 of 32 segments.
    2021-09-13T23:17:48.602Z INFO Programming 10 of 32 segments.
    2021-09-13T23:17:50.072Z INFO Programming 11 of 32 segments.
    2021-09-13T23:17:51.540Z INFO Programming 12 of 32 segments.
    2021-09-13T23:17:53.033Z INFO Programming 13 of 32 segments.
    2021-09-13T23:17:54.515Z INFO Programming 14 of 32 segments.
    2021-09-13T23:17:55.981Z INFO Programming 15 of 32 segments.
    2021-09-13T23:17:57.450Z INFO Programming 16 of 32 segments.
    2021-09-13T23:17:58.930Z INFO Programming 17 of 32 segments.
    2021-09-13T23:18:00.398Z INFO Programming 18 of 32 segments.
    2021-09-13T23:18:01.862Z INFO Programming 19 of 32 segments.
    2021-09-13T23:18:03.349Z INFO Programming 20 of 32 segments.
    2021-09-13T23:18:04.823Z INFO Programming 21 of 32 segments.
    2021-09-13T23:18:06.293Z INFO Programming 22 of 32 segments.
    2021-09-13T23:18:07.760Z INFO Programming 23 of 32 segments.
    2021-09-13T23:18:09.226Z INFO Programming 24 of 32 segments.
    2021-09-13T23:18:09.924Z INFO Programming 25 of 32 segments.
    2021-09-13T23:18:10.621Z INFO Programming 26 of 32 segments.
    2021-09-13T23:18:11.322Z INFO Programming 27 of 32 segments.
    2021-09-13T23:18:12.018Z INFO Programming 28 of 32 segments.
    2021-09-13T23:18:12.717Z INFO Programming 29 of 32 segments.
    2021-09-13T23:18:13.419Z INFO Programming 30 of 32 segments.
    2021-09-13T23:18:14.120Z INFO Programming 31 of 32 segments.
    2021-09-13T23:18:14.412Z INFO Programming 32 of 32 segments.
    2021-09-13T23:18:14.623Z INFO Programming finished.

    2021-09-13T23:18:14.675Z INFO Checking for newer bootloader.
    2021-09-13T23:18:14.687Z INFO Verifying 1 of 1 segments.
    2021-09-13T23:18:14.728Z INFO Verifying 1 of 30 segments.
    2021-09-13T23:18:14.731Z INFO Verifying 2 of 30 segments.
    2021-09-13T23:18:14.737Z INFO Verifying 3 of 30 segments.
    2021-09-13T23:18:14.738Z INFO Verifying 4 of 30 segments.
    2021-09-13T23:18:14.740Z INFO Verifying 5 of 30 segments.
    2021-09-13T23:18:14.743Z INFO Verifying 6 of 30 segments.
    2021-09-13T23:18:14.746Z INFO Verifying 7 of 30 segments.
    2021-09-13T23:18:14.749Z INFO Verifying 8 of 30 segments.
    2021-09-13T23:18:14.751Z INFO Verifying 9 of 30 segments.
    2021-09-13T23:18:14.754Z INFO Verifying 10 of 30 segments.
    2021-09-13T23:18:14.757Z INFO Verifying 11 of 30 segments.
    2021-09-13T23:18:14.760Z INFO Verifying 12 of 30 segments.
    2021-09-13T23:18:14.763Z INFO Verifying 13 of 30 segments.
    2021-09-13T23:18:14.766Z INFO Verifying 14 of 30 segments.
    2021-09-13T23:18:14.769Z INFO Verifying 15 of 30 segments.
    2021-09-13T23:18:14.772Z INFO Verifying 16 of 30 segments.
    2021-09-13T23:18:14.775Z INFO Verifying 17 of 30 segments.
    2021-09-13T23:18:14.779Z INFO Verifying 18 of 30 segments.
    2021-09-13T23:18:14.781Z INFO Verifying 19 of 30 segments.
    2021-09-13T23:18:14.784Z INFO Verifying 20 of 30 segments.
    2021-09-13T23:18:14.787Z INFO Verifying 21 of 30 segments.
    2021-09-13T23:18:14.790Z INFO Verifying 22 of 30 segments.
    2021-09-13T23:18:14.793Z INFO Verifying 23 of 30 segments.
    2021-09-13T23:18:14.796Z INFO Verifying 24 of 30 segments.
    2021-09-13T23:18:14.799Z INFO Verifying 25 of 30 segments.
    2021-09-13T23:18:14.802Z INFO Verifying 26 of 30 segments.
    2021-09-13T23:18:14.805Z INFO Verifying 27 of 30 segments.
    2021-09-13T23:18:14.808Z INFO Verifying 28 of 30 segments.
    2021-09-13T23:18:14.811Z INFO Verifying 29 of 30 segments.
    2021-09-13T23:18:14.814Z INFO Verifying 30 of 30 segments.
    2021-09-13T23:18:14.918Z INFO Verifying 1 of 1 segments.
    2021-09-13T23:18:14.948Z INFO Verification completed.

    2021-09-13T23:18:14.991Z INFO Modem DFU completed successfully!
    2021-09-13T23:29:28.311Z INFO Target device closed.

  • I was referring to the logs from the device, sent over UART. Depending on what tools you are using to send the AT commands, you should be able to see them there, e.g. if you are using the Link Monitor tool.

    But, based on the log from the Programmer app, I believe I know what the issue is.

    The images in the img_fota_* folders only contain the application, and not the bootloader, and are ment to be used for DFU. Either over UART, or over the air.

    But, from the log, it looks like you are programming the device "normally", with a programmer. That will delete the bootloader, so that the application isn't able to boot.

    Instead, you should be using the images in the img_app_bl folder.

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