DFU upgrade

[Jim]

Regarding DFU upgrade, I have the following questions（sdk14.2）:
1.nrf52832 will be paired and bound after connecting with the mobile phone, then in the sdk_config.h file NRF_DFU_BLE_BUTTONLESS_SUPPORTS_BONDS is not necessarily set to 1, not set to 1 what will be the consequences?
2. I added buttonless dfu to my program code, but the ble_dfu_buttonless_async_svci_init() function returns the error NRF_ERROR_NO_MEM, I have defined NRF_DFU_BLE_BUTTONLESS_SUPPORTS_BONDS as 1, how do I need to modify it?
3. When debugging the program, I burned the protocol stack and the BootLoader program and debug it in Keil. I can't run it. What are the possible reasons? Should I program the BootLoader program when debugging?

[Jim]

I still want to know that when I set NRF_DFU_BLE_BUTTONLESS_SUPPORTS_BONDS to 1, DFU can successfully update the software after pairing with iphone, but when using Android phone and nrf52832 to update with nRF Toolbox, “Upload failed: GATT WRITE NOT PERMIT” will appear. Error message. By log view, the reason seems to be "Client did not have the Service Changed indication set to enabled"
The settings related to DFU in application's sdk_config.h are as follows:
1.#define BLE_DFU_ENABLED 1
2.#define NRF_DFU_BLE_BUTTONLESS_SUPPORTS_BONDS 1
3.#define NRF_SDH_BLE_SERVICE_CHANGED 1
DFU related settings in sdk_config.h in bootloader are as follows
1.#define NRF_DFU_BLE_REQUIRES_BONDS 1
2.#define NRF_SDH_BLE_SERVICE_CHANGED 1

In addition, the relevant log output information is as follows, please help look at what is the problem? Thank you!

0> <debug> nrf_sdh_ble: BLE event: 0x50.
0> <info> app: Received indication state 1
0> <debug> nrf_sdh_soc: SoC event: 0x2.
0> <debug> nrf_sdh_soc: SoC event: 0x2.
0> <debug> nrf_sdh_soc: SoC event: 0x2.
0> <debug> nrf_sdh_soc: SoC event: 0x2.
0> <debug> nrf_sdh_soc: SoC event: 0x2.
0> <debug> nrf_sdh_ble: BLE event: 0x51.
0> <info> app: Writing peer data to the bootloader
0> <info> app: ---------------system attribute table: 8--------------
0> <debug> nrf_sdh_soc: SoC event: 0x2.
0> <info> app: Inside main
0> <debug> app: In nrf_bootloader_init
0> <debug> app: in weak nrf_dfu_init_user
0> <debug> app: In real nrf_dfu_init
0> <debug> nrf_dfu_settings: Running nrf_dfu_settings_init(sd_irq_initialized=false).
0> <debug> nrf_dfu_flash: Calling nrf_dfu_flash_init(sd_irq_initialized=false)...
0> <debug> nrf_dfu_flash: Initializing nrf_fstorage_nvmc backend.
0> <debug> app: Initializing the clock.
0> <debug> app: Enter nrf_dfu_continue
0> <debug> app: Valid App
0> <debug> app: Application sent bootloader request
0> <debug> app: In nrf_dfu_transports_init
0> <debug> app: num transports: 1
0> <debug> app: Initializing BLE DFU transport
0> <debug> app: Copying peer data
0> <debug> app: vector table: 0x00073000
0> <debug> app: vector table: 0x00073000
0> <debug> app: Error code - sd_softdevice_vector_table_base_set: 0x00000000
0> <debug> app: Running Service Changed config
0> <debug> app: Finished running Service Changed config
0> <debug> app: Enabling SoftDevice.
0> <warning> nrf_sdh_ble: RAM starts at 0x20002830, can be adjusted to 0x20001FF0.
0> <warning> nrf_sdh_ble: RAM size can be adjusted to 0xE010.
0> <debug> app: SoftDevice enabled.
0> <debug> app: Regular adv name
0> <debug> app: ##### Setting adv with peer data ####
0> <debug> app: ##### IRK Found. Setting whitelist ####
0> <debug> app: Finished initializing BLE DFU transport
0> <debug> app: After nrf_dfu_transports_init
0> <debug> nrf_dfu_flash: Calling nrf_dfu_flash_init(sd_irq_initialized=true)...
0> <debug> nrf_dfu_flash: Initializing nrf_fstorage_sd backend.
0> <debug> app: Waiting for events
0> <debug> app: == conn sec update request
0> <debug> app: Sending Service Changed indication
0> <warning> app: Client did not have the Service Changed indication set to enabled. Error: 0x00000008
0> <debug> app: == We are finished handling conn sec update
0> <debug> app: DFU reset due to inactivity timeout.
0> <info> app: Inside main
0> <debug> app: In nrf_bootloader_init
0> <debug> app: in weak nrf_dfu_init_user
0> <debug> app: In real nrf_dfu_init
0> <debug> nrf_dfu_settings: Running nrf_dfu_settings_init(sd_irq_initialized=false).
0> <debug> nrf_dfu_flash: Calling nrf_dfu_flash_init(sd_irq_initialized=false)...
0> <debug> nrf_dfu_flash: Initializing nrf_fstorage_nvmc backend.
0> <debug> app: Initializing the clock.
0> <debug> app: Enter nrf_dfu_continue
0> <debug> app: Valid App
0> <debug> app: Enter nrf_dfu_app_is_valid
0> <debug> app: Return true. App was valid
0> <debug> nrf_dfu_settings_svci: Erasing settings page additional data.
0> <debug> app: Enter nrf_dfu_app_is_valid
0> <info> app: started
0> <debug> nrf_sdh: State request: 0x00000000
0> <debug> nrf_sdh: Notify observer 0x0003B22C => ready
0> <debug> nrf_sdh: State change: 0x00000000
0> <debug> nrf_sdh: State change: 0x00000001
0> <debug> nrf_sdh_ble: RAM starts at 0x20001FF0
0> <info> app: Setting vector table to bootloader: 0x00073000
0> <info> app: Setting vector table to main app: 0x00023000

[Edvin]

Hello,

GATT WRITE NOT PERMIT is usually related to insufficient encryption of the link. Are you sure that the android phone is encrypting the link? Maybe you can compare the two logs for the Android and iPhone and see if you can find any difference.

 

Just a small side note:

You should update your RAM start and RAM size according to the log warnings. This is to prevent unexpected errors. However, it doesn't look like this is the source of the issue.

 

Let me rephrase my first answer in this post:

You can use NRF_DFU_BLE_BUTTONLESS_SUPPORTS_BONDS = 1. Just be aware that if you use this in a product without a programming chip, and someone manages to delete bonding information on e.g. the phone while the device is in DFU mode, then the device will be bricked. It would have to be programmed with a programmer in order to be restored. As long as you are aware of this, there is no problem using bonding in DFU.

 

It looks like in your log that the Android doesn't enable indications for the Service Changed, so the phone does not notice that the device enters DFU mode, and the device times out the DFU session due to inactivity timeout.

 

Can you compare this log with the log from the iPhone, and see if you get any noticeable difference? Does it say that the link is encrypted when you connect with the iPhone? And does it say that "Client did not have the Service Changed indication set to enabled. Error: 0x00000008"

 

Best regards,

Edvin