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Blinky does not work after OTA Firmware update

Hi,

I am following the step by step tutorial "Getting Started with Secure DFU Bootloader Step by Step guide"

Before following the above guide I compiled ble_app_blinky from the examples/ble_peripheral folder of NRF52 SDK Ver 17.0.2

The above example was tested successfully on NRF52-DK along with NRF Blinky App running on an Android phone. Everything worked well.

I then followed the guide to create:

1. Secure bootloader (Steps A, B in the guide)

2. Created the application ZIP file (Step C)

3. Performed DFU using NRF Connect for mobile (Steps D1 to D3)

STEP D4 (Testing the Application after DFU) - failed - Most of the time I could not see the BLE Device name in NRF Blinky App. Once I did see the BLE Device name "Nordic_Blinky" but it would not connect. Once it did connect and I was even able to switch on the LED but after that it seemed the program froze - there were no responses to LED on/off on Blinky App nor was there any response to BUTTON press on the NRF52-DK.

I failed to understand what is it that I am doing that is breaking the Application!

Any help in this regard would be helpful.

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dejans over 4 years ago in reply to Murthy Udupa +1 verified

Hi, Following the same guide and using ble_app_blinky application on nRF52840 (with SoftDevice s140), I was able to see the "Nordic_blinky" after DFU has finished successfully. For testing I used Bluetooth…

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0 dejans over 4 years ago

Hi,

STEP D4 (Testing the Application after DFU) - failed - Most of the time I could not see the BLE Device name in NRF Blinky App. Once I did see the BLE Device name "Nordic_Blinky" but it would not connect. Once it did connect and I was even able to switch on the LED but after that it seemed the program froze - there were no responses to LED on/off on Blinky App nor was there any response to BUTTON press on the NRF52-DK.

Could you please provide more information about these transitions (cannot see the device -> can see the device, cannot connect -> can connect)?
When did they occur? Did you do anything to enable these transitions?

Best regards,
Dejan
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0 dejans over 4 years ago

Hi,

STEP D4 (Testing the Application after DFU) - failed - Most of the time I could not see the BLE Device name in NRF Blinky App. Once I did see the BLE Device name "Nordic_Blinky" but it would not connect. Once it did connect and I was even able to switch on the LED but after that it seemed the program froze - there were no responses to LED on/off on Blinky App nor was there any response to BUTTON press on the NRF52-DK.

Could you please provide more information about these transitions (cannot see the device -> can see the device, cannot connect -> can connect)?
When did they occur? Did you do anything to enable these transitions?

Best regards,
Dejan
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0 Murthy Udupa over 4 years ago in reply to dejans

Hi Dejan,

I restarted fresh as I had modified the code with some debug line in blink's main.c and was not sure if did something wrong.

Here is what I mean by restarted:

PART 1 - blinky app as is

1. Downloaded NRF52 SDK 17.0.2

2. Recompiled ble_app_blinky available in the examples/ble_peripheral folder

3. Tested the app on NRF52-DK using. both Android and iOS nrf blinky app. Everything worked consistently - i.e. LED on/of as well as BUTTON press/release.

PART 2 - blinky app - transferred using SECURE DFU

Next step was to do the secure DFU OTA.

1. Created the secure bootloader hex file by following steps in the guide (Steps B1a,B2,B3)

2. Generated DFU package (.zip file) as in step C of guide

 nrfutil pkg generate --hw-version 52 --sd-req 0x0101 --application-version 0 --application ble_app_blinky_new.hex --key-file ../private.pem blinky_new.zip

3. Created Bootloader Settings file

nrfutil settings generate --family NRF52 --application ble_app_blink_new.hex --application-version 0 --bootloader-version 0 --bl-settings-version 2 boot_loader_setting.hex

4. Flashed SoftDevice and Secure Bootloader and Bootloader Settings file

## Flash SD
nrfjprog --family nRF52 --verify --program s132_nrf52_7.2.0_softdevice.hex --sectorerase
echo ... Softdevice flashed 
echo ----------------------
## Flash BOOTLOADER
nrfjprog --family nRF52 --verify --program secure_bootloader_ble_s132_pca10040_debug_mar22.hex --sectorerase
echo ... Secure Bootloader flashed
echo ----------------------
## Flast Settings
nrfjprog --family nRF52 --verify --program boot_loader_setting.hex --sectorerase

5. Restarted NRF52 DK (power off/on)

6. Using iOS app nRF Connect connected to NRF52 DK (device named "DfuTarg" ) and did DFU over the air using the package generated in step 2 of PART 2.

Logfile of secure DFU attached

Fullscreen text-E19AC31AA26A-1.txt Download

File Name: blinky_new.zip Parts: 1 Size: 175 KB Soft Device Size: Zero KB Bootloader Size: Zero KB Connecting to DfuTarg... Connected to DfuTarg Discovering services... Services discovered Starting Secure DFU... Connected to DfuTarg Services discovered Secure DFU Service found Discovering characteristics in DFU Service... DFU characteristics discovered MTU set to 247 Enabling notifications for 8EC90001-F315-4F60-9FB8-838830DAEA50... Notifications enabled for 8EC90001-F315-4F60-9FB8-838830DAEA50 Secure DFU Control Point notifications enabled Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600601000200000000000000000000 Command object selected (Max size = 512, Offset = 0, CRC = 00000000) received Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600101 Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600201 Packet Receipt Notif disabled (Op Code = 2, Value = 0) Writing to characteristic 8EC90002-F315-4F60-9FB8-838830DAEA50... Command object sent (CRC = 835828DA) Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 6003018d000000da285883 Checksum (Offset = 141, CRC = 835828DA) received Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600401 Command object executed Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600201 Packet Receipt Notif enabled (Op Code = 2, Value = 12) Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600601001000000000000000000000 Data object selected (Max size = 4096, Offset = 0, CRC = 00000000) received Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600101 Data object 1/43 created Uploading firmware... Sending firmware to DFU Packet characteristic... Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 60030100100000bbdf12c5 Checksum (Offset = 4096, CRC = C512DFBB) received Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600401 Data object executed Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600101 Data object 2/43 created Uploading firmware... Sending firmware to DFU Packet characteristic... Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600301002000000d68113f Checksum (Offset = 8192, CRC = 3F11680D) received Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600401 Data object executed Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600101 Data object 3/43 created Uploading firmware... Sending firmware to DFU Packet characteristic... Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 60030100300000a422b687 Checksum (Offset = 12288, CRC = 87B622A4) received Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600401 Data object executed Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600101 Data object 4/43 created Uploading firmware... Sending firmware to DFU Packet characteristic... Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600301004000003c303cb7 Checksum (Offset = 16384, CRC = B73C303C) received Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600401 Data object executed Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600101 Data object 5/43 created Uploading firmware... Sending firmware to DFU Packet characteristic... Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 60030100500000e6fd0f92 Checksum (Offset = 20480, CRC = 920FFDE6) received Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600401 Data object executed Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600101 Data object 6/43 created Uploading firmware... Sending firmware to DFU Packet characteristic... Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 60030100600000e4e87bfd Checksum (Offset = 24576, CRC = FD7BE8E4) received Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600401 Data object executed Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600101 Data object 7/43 created Uploading firmware... Sending firmware to DFU Packet characteristic... Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600301007000000ca51b99 Checksum (Offset = 28672, CRC = 991BA50C) received Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600401 Data object executed Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600101 Data object 8/43 created Uploading firmware... Sending firmware to DFU Packet characteristic... Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 60030100800000451b28e8 Checksum (Offset = 32768, CRC = E8281B45) received Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600401 Data object executed Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600101 Data object 9/43 created Uploading firmware... Sending firmware to DFU Packet characteristic... Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 6003010090000087e964f1 Checksum (Offset = 36864, CRC = F164E987) received Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600401 Data object executed Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600101 Data object 10/43 created Uploading firmware... Sending firmware to DFU Packet characteristic... Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 60030100a0000071ce20dc Checksum (Offset = 40960, CRC = DC20CE71) received Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600401 Data object executed Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600101 Data object 11/43 created Uploading firmware... Sending firmware to DFU Packet characteristic... Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 60030100b0000011b98140 Checksum (Offset = 45056, CRC = 4081B911) received Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600401 Data object executed Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600101 Data object 12/43 created Uploading firmware... Sending firmware to DFU Packet characteristic... Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 60030100c00000a7b5c703 Checksum (Offset = 49152, CRC = 03C7B5A7) received Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600401 Data object executed Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600101 Data object 13/43 created Uploading firmware... Sending firmware to DFU Packet characteristic... Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 60030100d00000d9fe6053 Checksum (Offset = 53248, CRC = 5360FED9) received Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600401 Data object executed Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600101 Data object 14/43 created Uploading firmware... Sending firmware to DFU Packet characteristic... Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 60030100e00000fb10f5ea Checksum (Offset = 57344, CRC = EAF510FB) received Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600401 Data object executed Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600101 Data object 15/43 created Uploading firmware... Sending firmware to DFU Packet characteristic... Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 60030100f00000ce43757b Checksum (Offset = 61440, CRC = 7B7543CE) received Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600401 Data object executed Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600101 Data object 16/43 created Uploading firmware... Sending firmware to DFU Packet characteristic... Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 60030100000100aa9ce51f Checksum (Offset = 65536, CRC = 1FE59CAA) received Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600401 Data object executed Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600101 Data object 17/43 created Uploading firmware... Sending firmware to DFU Packet characteristic... Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600301001001006a80d9e4 Checksum (Offset = 69632, CRC = E4D9806A) received Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600401 Data object executed Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600101 Data object 18/43 created Uploading firmware... Sending firmware to DFU Packet characteristic... Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 60030100200100389fd759 Checksum (Offset = 73728, CRC = 59D79F38) received Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600401 Data object executed Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600101 Data object 19/43 created Uploading firmware... Sending firmware to DFU Packet characteristic... Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600301003001000cc9c4ca Checksum (Offset = 77824, CRC = CAC4C90C) received Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600401 Data object executed Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600101 Data object 20/43 created Uploading firmware... Sending firmware to DFU Packet characteristic... Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 60030100400100ad4cf12f Checksum (Offset = 81920, CRC = 2FF14CAD) received Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600401 Data object executed Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600101 Data object 21/43 created Uploading firmware... Sending firmware to DFU Packet characteristic... Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 60030100500100e712da51 Checksum (Offset = 86016, CRC = 51DA12E7) received Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600401 Data object executed Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600101 Data object 22/43 created Uploading firmware... Sending firmware to DFU Packet characteristic... Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 6003010060010054094e37 Checksum (Offset = 90112, CRC = 374E0954) received Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600401 Data object executed Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600101 Data object 23/43 created Uploading firmware... Sending firmware to DFU Packet characteristic... Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 6003010070010006c4da00 Checksum (Offset = 94208, CRC = 00DAC406) received Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600401 Data object executed Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600101 Data object 24/43 created Uploading firmware... Sending firmware to DFU Packet characteristic... Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 60030100800100c8a22ef3 Checksum (Offset = 98304, CRC = F32EA2C8) received Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600401 Data object executed Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600101 Data object 25/43 created Uploading firmware... Sending firmware to DFU Packet characteristic... Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600301009001001f5e799c Checksum (Offset = 102400, CRC = 9C795E1F) received Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600401 Data object executed Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600101 Data object 26/43 created Uploading firmware... Sending firmware to DFU Packet characteristic... Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 60030100a00100190e6662 Checksum (Offset = 106496, CRC = 62660E19) received Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600401 Data object executed Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600101 Data object 27/43 created Uploading firmware... Sending firmware to DFU Packet characteristic... Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 60030100b0010058be3a50 Checksum (Offset = 110592, CRC = 503ABE58) received Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600401 Data object executed Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600101 Data object 28/43 created Uploading firmware... Sending firmware to DFU Packet characteristic... Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 60030100c0010040dd3c82 Checksum (Offset = 114688, CRC = 823CDD40) received Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600401 Data object executed Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600101 Data object 29/43 created Uploading firmware... Sending firmware to DFU Packet characteristic... Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 60030100d001000434a103 Checksum (Offset = 118784, CRC = 03A13404) received Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600401 Data object executed Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600101 Data object 30/43 created Uploading firmware... Sending firmware to DFU Packet characteristic... Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 60030100e001003696e356 Checksum (Offset = 122880, CRC = 56E39636) received Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600401 Data object executed Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600101 Data object 31/43 created Uploading firmware... Sending firmware to DFU Packet characteristic... Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 60030100f0010096040b66 Checksum (Offset = 126976, CRC = 660B0496) received Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600401 Data object executed Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600101 Data object 32/43 created Uploading firmware... Sending firmware to DFU Packet characteristic... Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600301000002006d34c041 Checksum (Offset = 131072, CRC = 41C0346D) received Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600401 Data object executed Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600101 Data object 33/43 created Uploading firmware... Sending firmware to DFU Packet characteristic... Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 60030100100200ab14e4bc Checksum (Offset = 135168, CRC = BCE414AB) received Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600401 Data object executed Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600101 Data object 34/43 created Uploading firmware... Sending firmware to DFU Packet characteristic... Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 60030100200200059d98a5 Checksum (Offset = 139264, CRC = A5989D05) received Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600401 Data object executed Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600101 Data object 35/43 created Uploading firmware... Sending firmware to DFU Packet characteristic... Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 60030100300200129c5d05 Checksum (Offset = 143360, CRC = 055D9C12) received Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600401 Data object executed Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600101 Data object 36/43 created Uploading firmware... Sending firmware to DFU Packet characteristic... Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 60030100400200e6ad58d8 Checksum (Offset = 147456, CRC = D858ADE6) received Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600401 Data object executed Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600101 Data object 37/43 created Uploading firmware... Sending firmware to DFU Packet characteristic... Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 6003010050020071bde020 Checksum (Offset = 151552, CRC = 20E0BD71) received Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600401 Data object executed Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600101 Data object 38/43 created Uploading firmware... Sending firmware to DFU Packet characteristic... Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600301006002004e23fdbc Checksum (Offset = 155648, CRC = BCFD234E) received Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600401 Data object executed Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600101 Data object 39/43 created Uploading firmware... Sending firmware to DFU Packet characteristic... Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 60030100700200ab2750f5 Checksum (Offset = 159744, CRC = F55027AB) received Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600401 Data object executed Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600101 Data object 40/43 created Uploading firmware... Sending firmware to DFU Packet characteristic... Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 6003010080020024e11123 Checksum (Offset = 163840, CRC = 2311E124) received Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600401 Data object executed Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600101 Data object 41/43 created Uploading firmware... Sending firmware to DFU Packet characteristic... Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 60030100900200366cb62e Checksum (Offset = 167936, CRC = 2EB66C36) received Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600401 Data object executed Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600101 Data object 42/43 created Uploading firmware... Sending firmware to DFU Packet characteristic... Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 60030100a00200c6b4bc76 Checksum (Offset = 172032, CRC = 76BCB4C6) received Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600401 Data object executed Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600101 Data object 43/43 created Uploading firmware... Sending firmware to DFU Packet characteristic... Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600301e8ac0200588be7f6 Checksum (Offset = 175336, CRC = F6E78B58) received Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50... Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50 Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600401 Data object executed Upload completed in 18.09 seconds Disconnected. Disconnected by the remote device

7. Powered off / on the NRF52 DK

8. Using nrf Connect app on iOS - Tried to look for "Nordic_Blinky" but did NOT see any. Tried this multiple time by restarting NRF52 board and checked with both iOS and Android phones - the result was same - cannot see the BLE device name. [This is way different from my observations in earlier post but this time I was careful of recording each step and have provided more details.

After this weekend - I will try the same process with buttonless DFU IMAGEs provided in the SDK to check if that works.

Do let me know if you need more details.

Regards

Murthy

0 Murthy Udupa over 4 years ago in reply to Murthy Udupa

Hi Dejan,

Today I tested Buttonless Secure DFU without bonds using the images that came with the SDK 17.0.2

I was able to Test the whole process as given in the SDK documentation.

From this I conclude that the BLINKY fails on DFU OTA because I may be overwriting some code while flashing but I don't know how to check that.

Grateful for a solution.
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0 dejans over 4 years ago in reply to Murthy Udupa

Hi,

Can you provide more information about the current issue?
Are you having a problem with the DFU process or is the problem that after the DFU has finished you cannot see your device anymore?

Best regards,
Dejan
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0 Murthy Udupa over 4 years ago in reply to dejans

Hi Dejan,

The DFU process works and there are no issues.

It is after the DFU is completed successfully that I cannot see device name. In this case I am using the ble_blinky app.

Note: I did not modify anything in the example ble_blinky app.

I have tried the buttonless_dfu_without_bonds image provided in the SDK - DFU as well as being able to device name after DFU works well. No issues.

I am really hard pressed for time. I am stuck at this last step. Grateful for any help. I am sure I am missing some step somewhere and not able to see it.
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+1 dejans over 4 years ago in reply to Murthy Udupa

Hi,

Following the same guide and using ble_app_blinky application on nRF52840 (with SoftDevice s140), I was able to see the "Nordic_blinky" after DFU has finished successfully. For testing I used Bluetooth Low Energy desktop application v3.0.0.

There are several things you could try in order to find the cause of the problem.
Make sure that you are using the proper unchanged application from ble_app_blinky_sample.
You could try inputting some print statements into your code and see in the terminal if you get anything. This could indicate some other problem with your application (excluding Bluetooth).
Another thing to try would be to flash the same application to your board and check if it is advertising. This would show that Bluetooth part is working correctly.
Are you sure that you have not missed any steps describe in the guide or used a changed version of the same application?

Best regards,
Dejan
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