How to do BLE DFU for nRF7002DK

[Yoshihiro Goto]

Hello,

I am trying to implement BLE DFU with nRF7002DK and SDK 2.7.0(Sorry but not use sysbuild yet.)

https://academy.nordicsemi.com/courses/nrf-connect-sdk-intermediate/lessons/lesson-8-bootloaders-and-dfu-fota/

I tried to do BLE DFU with nRF7002DK referring to Lesson 8, but I cannot write to the external flash memory.
<err> mcumgr_img_grp: Failed to open flash area ID 1: -2

Also, the Device Manager app is giving me the error 'n must be >= 0'.

(Sorry, but I have no idea what the error means).

Of course, all jumpers from SB11 to SB14 are shorted.

I will attach the project so you can tell me what I am missing.

8484.ble_dfu_nrf7002.zip

I think I need to set the MTU, but haven't tried it yet. Because I don't think this error has anything to do with MTU.

Best Regards,

Yoshihiro Goto.

[Amanda Hsieh]

Hi, 

Please refer to this smp_svr_nRF7002DK.7z project which includes configs and overlay files for nRF7002DK and NCS v2.7.1 without sysbuild. 

Beware that this code/configuration is not fully tested or qualified and should be considered provided “as-is”. Please test it with your application and let me know if you find any issues.

Regards,
Amanda H.

[Yoshihiro Goto]

Dear Amanda,

Thank you for sending me your sample project.

I no longer get the '<err> mcumgr_img_grp: Failed to open flash area ID 1: -2' error, but instead get '<err> mcumgr_img_grp: Image upload inspect failed: 9'.

Also in the device manager app, I no longer get the 'n must be >= 0' error, but instead I get 'Hash not found(8)' or 'No free slot(9)' errors.

The progress bar in the Device Manager app shows that it appears to be able to DFU, but the firmware has not been updated.

I need a little more help.

[Amanda Hsieh]

Hi,

Do you update the file with the same static partition? You can duplicate build/partitions.yml, place it in the app folder, and rename it to pm_static.yml to build.   

-Amanda H.

[Yoshihiro Goto]

Hello,

I tried to rebuild using the static partition function, but I get the same error.
I am wondering if there is something wrong with the build message for the static partition. Specifically, the message that little_fs definitions are not included, etc.

Are there any other issues that you can think of?
If using sysbuild would solve the problem, I would use sysbuild.
(The reason I am not using sysbuild is simply that I don't understand it.)

[Yoshihiro Goto]

Hi,

I have one more question... I'm assuming from this sample project that I need to implement LittleFS in order to use external flash, is that correct?

[Amanda Hsieh]

Yoshihiro Goto said:

I'm assuming from this sample project that I need to implement LittleFS in order to use external flash, is that correct?

No, you can disable LittleFS if you don't use it. 

Yoshihiro Goto said:

Are there any other issues that you can think of?

No, could you try to test with my project and compare the config and overlay files? 

[Yoshihiro Goto]

Hi,

The latest project files are attached. This project is to check if the network core is able to DFU by switching CONFIG_BT_EXT_ADV on and off.

dfu_ble_nrf7002.zip
Unfortunately, The problem has not yet been resolved. I have looked at various threads and also created mcuboot_secondary_1 (flash area for network core) on external flash. But it doesn't work.

Best regards,
Yoshihiro Goto