No bootloader was found error in ble_app_buttonless_dfu .

[kishor babu]

Hi ,

I want to add DFU service into ble_app-uart example, for that I want take reference as ble_app_buttonless_dfu.

But when I am trying to test the working of ble_app_button_less_dfu , so I flashed softdevice first and then the hex file file of application, but I am getting following output in the UART terminal.

error> app: No bootloader was found

<error> app: Fatal

<error> app: No bootloader was found

<error> app: Fatal

<error> app: No bootloader was found

<error> app: Fatal

<error> app: No bootloader was found

<error> app: Fatal

<error> app: No bootloader was found

<error> app: Fatal

I am using nRF52832 DK, sdk v15.0.

How can I fix this issue?

[Amanda Hsieh]

Hi, 

It seems the Bootloader is lost. The bootloader is designed so that when the DK is powered on, it will amongst other things check if there is an application present in flash and if there is, it will boot into this application FW. Please refer to this nRF52832-buttonless-dfu-development-tutorial to prepare the image. 

Best regards,

Amanda 

[kishor babu]

But it is happening with every SDK like v15, v15.3.

So how can we test the default functionality.

[Amanda Hsieh]

Hi, 

1. Which board do you use? Is it a custom board or Nordic DK? Which nRF chip is used on the board?
2. Do you build the image including SD + Bootloader + Settings + Application as the Step.4 in nRF52832-buttonless-dfu-development-tutorial? 

Step 1 - Test Buttonless DFU Template Application inside the nRF52832-buttonless-dfu-development-tutorial also shows how to test DFU function. 

-Amanda

[kishor babu]

Amanda Hsieh said:

Which board do you use? Is it a custom board or Nordic DK? Which nRF chip is used on the board?

I am Nordic development kit only, I am using nrf52832.

Amanda Hsieh said:

Do you build the image including SD + Bootloader + Settings + Application as the Step.4 in nRF52832-buttonless-dfu-development-tutorial?

Here I am not yet creating my own bootloader, I want to test default buttonless_dfu application by sending default dfu image file that is available in the sdk.

But when I am flashing default code itself i am getting the above mentioned errors in my UART terminal.

[Amanda Hsieh]

Hi, 

Is it possible for you to go through the description in the Step 1 - Test Buttonless DFU Template Application of nRF52832-buttonless-dfu-development-tutorial? Please let me know this can help you or not. Thanks.

-Amanda 

[kishor babu]

Hi,

I followed the same I am able to program the device using the tutorial, the device is advertising and I am able to connect to the device but when I am trying to update the hrs_application_s132.zip file by pressing the DFU button in nrfconnect application the device is disconnecting and it is not updating the firmware.

[Amanda Hsieh]

Hi,

 

1. Could you update the nRF Connect to the latest version v2.6.2 by setting -> check for updates now?

2. Could you try again or try other nRF52832 DK? 

When it completes the updating, it will be disconnected. You will see that the new application starts up by scanning for it with nRF Connect.

Please let me know this can help you or not. Thanks. 

-Amanda