DFU CHARACTERISTICS NOT FOUND issue with sdk 14.0.1

RE: DFU CHARACTERISTICS NOT FOUND issue with sdk 14.0.1

edmond.yun — Fri, 26 Jan 2018 02:58:57 GMT

Hello, Hung,

good news, I solved issue now, the problem is NRF_SDH_BLE_VS_UUID_COUNT , after increasing the number, the issue is not happened, anyway, I am very thankful for your kind guide, have good day

thanks.

RE: DFU CHARACTERISTICS NOT FOUND issue with sdk 14.0.1

edmond.yun — Fri, 26 Jan 2018 00:48:57 GMT

Hello, Hung,

firstly thankful for detailed guide, and I would like share more status with you, Could you please kindly refer it and guide me more ?

firstly I already succeeded the test of dfu with buttonless app & secure boot in sdk 14.0.1 and then I tried to merge the code with my code, after that the compile is already ok, only when trying to do dfu in app with pak file(app), I can see "the service of dfu is empty" and the message : "dfu characteristic is empty"...

so I wonder why this kind of issue is happened with merged source ....? Could you please kindly review what I should merge or set in skd_config.h ? thankful for your kindness in advance,

thanks.

RE: DFU CHARACTERISTICS NOT FOUND issue with sdk 14.0.1

Hung Bui — Thu, 25 Jan 2018 13:12:44 GMT

Hi Edmond,

Please don't try to test everything at once.

Please confirm if you setup passes the following test:

Test bootloader, DFU upload a normal application, such as ble_app_hrs . Test only the bootloader, don't do merge application or flash bootloader setting.
Test the buttonless DFU application + bootloader. Make sure you can do DFU from the application so that the application automatic switch to bootloader and then do DFU.
Use BLE master tool, such as the NRFConnect tool to open your combined buttonless DFU and your application ( ble_app_uart), make sure you see the 2 services. Make sure you have increased NRF_SDH_BLE_VS_UUID_COUNT to match with number of 128 bit base UUID you define (in your case it should be 2 ? )

After that you can start testing with the buttonless feature, try to write to the DFU control point to switch the application to the bootloader. Please follow the documentation.

RE: DFU CHARACTERISTICS NOT FOUND issue with sdk 14.0.1

edmond.yun — Thu, 25 Jan 2018 06:03:54 GMT

currently I can build after merging the code of buttonless app... when I check the status of DFU service in app, "this service is empty" sentence is showed,....why ?

in the setting of sdk_config header file,

#ifndef BLE_DFU_ENABLED #define BLE_DFU_ENABLED 1 #endif

// NRF_DFU_BLE_BUTTONLESS_SUPPORTS_BONDS - Buttonless DFU supports bonds.

#ifndef NRF_DFU_BLE_BUTTONLESS_SUPPORTS_BONDS #define NRF_DFU_BLE_BUTTONLESS_SUPPORTS_BONDS 0 #endif

thanks.