BLE DFU example is not connectable

RE: BLE DFU example is not connectable

moose — Tue, 19 May 2020 01:33:54 GMT

I have the same exact problem. Can I please get help form nordic to debug this issue? I am not expecting any hardware update to my board so I need to get it going. We are using BMD-301. Thanks!

RE: BLE DFU example is not connectable

mredp — Thu, 07 Nov 2019 14:31:24 GMT

A new board arrived with an ISP-1807 module and this issue is no longer a problem. I am not sure why it was causing issues on the BC840 module - and it was confusing because everything else worked except the bootloader. Even during normal application, I could advertise and connect on my phone.

Anyway, this now works on the new board. Thanks for your help.

RE: BLE DFU example is not connectable

mredp — Thu, 07 Nov 2019 10:26:35 GMT

Ok so, I got this from the RTT Viewer

<00> info> app: Inside main
00> 
<00> debug> app: In nrf_bootloader_init
00> 
<00> debug> nrf_dfu_settings: Calling nrf_dfu_settings_init()...
00> 
<00> debug> nrf_dfu_flash: Initializing nrf_fstorage_nvmc backend.
00> 
<00> debug> nrf_dfu_settings: Using settings page.
00> 
<00> debug> nrf_dfu_settings: Copying forbidden parts from backup page.
00> 
<00> debug> nrf_dfu_settings: Destination settings are identical to source, write not needed. Skipping.
00> 
<00> info> nrf_dfu_settings: Backing up settings page to address 0xFE000.
00> 
<00> debug> nrf_dfu_settings: Destination settings are identical to source, write not needed. Skipping.
00> 
<00> debug> app: Enter nrf_bootloader_fw_activate
00> 
<00> info> app: No firmware to activate.
00> 
<00> info> app: Boot validation failed. No valid app to boot.
00> 
<00> debug> app: DFU mode because app is not valid.
00> 
<00> info> nrf_bootloader_wdt: WDT is not enabled
00> 
<00> debug> app: in weak nrf_dfu_init_user
00> 
<00> debug> app: timer_stop (0x200057C4)
00> 
<00> debug> app: timer_activate (0x200057C4)
00> 
<00> info> app: Entering DFU mode.
00> 
<00> debug> app: Initializing transports (found: 1)
00> 
<00> debug> nrf_dfu_ble: Initializing BLE DFU transport
00> 
<00> debug> nrf_dfu_ble: Setting up vector table: 0x000F1000
00> 
<00> debug> nrf_dfu_ble: Enabling SoftDevice.
00> 
<00> debug> nrf_dfu_ble: Configuring BLE stack.
00> 
<00> debug> nrf_dfu_ble: Enabling the BLE stack.
00> 
<00> debug> nrf_dfu_ble: No advertising name found
00> 
<00> debug> nrf_dfu_ble: Using default advertising name
00> 
<00> debug> nrf_dfu_ble: Advertising...
00> 
<00> debug> nrf_dfu_ble: BLE DFU transport initialized.
00> 
<00> debug> nrf_dfu_flash: Initializing nrf_fstorage_sd backend.
00> 
<00> debug> app: Enter main loop
00>

And this is the log from my mobile phone.

As you can see I tried to connect 4 times. This error code is different than the one I get from the pca10056_s140_ble project.

RE: BLE DFU example is not connectable

bjorn-spockeli — Thu, 07 Nov 2019 10:00:27 GMT

Ok, could you flash the debug version of the bootloader example for the nRF52840, i.e. the one found in nRF5_SDK_16.0.0_684aa2c\examples\dfu\secure_bootloader\pca10056_s140_ble_debug and post the log output from the device when you connect to it with your smartphone. Also please post the entire log from nRF Connect on the mobile side.

RE: BLE DFU example is not connectable

mredp — Thu, 07 Nov 2019 09:05:12 GMT

Yes your correct, the log is from the nRF Connect app on my smartphone.

I have not set it. This is in the sdk_config:

#define NRF_DFU_BLE_REQUIRES_BONDS 0

RE: BLE DFU example is not connectable

bjorn-spockeli — Thu, 07 Nov 2019 08:39:59 GMT

Hi mredp,

Is the log, i.e.

Connected to [MAC ADDRESS]
Connection parameters updae failed with status 8 (interval: 45.0ms, latency: 0, timeout: 5000ms)
Error 8 (0x8): GATT INSUF AUTHORIZATION
Error 8 (0x8): GATT CONN TIMEOUT
Disconnected

from the nRF52840 side or the nRF Connect app on your smartphone?

GATT INSUF AUTHORIZATION usually means that the security level of the link does not match the security requirement set in the characteristic you are trying to read/write to.

Have you set NRF_DFU_BLE_REQUIRES_BONDS to 1 in the bootloader sdk_config.h file?

RE: BLE DFU example is not connectable

mredp — Wed, 06 Nov 2019 10:55:17 GMT

Another update. Once I OTA update the device using PC (nrfConnect). Then I can connect to my application using my phone.

So it appears that the only issue is that the my phone can't connect to the bootloader.

RE: BLE DFU example is not connectable

mredp — Wed, 06 Nov 2019 10:17:09 GMT

Sorry I spoke too soon, I am unable to replicate this success. I still am having issues connecting with my phone. Which is strange because I never have issues connecting with my own app - only when I flash the bootloader.

The error message is:

Connected to [MAC ADDRESS]
Connection parameters updae failed with status 8 (interval: 45.0ms, latency: 0, timeout: 5000ms)
Error 8 (0x8): GATT INSUF AUTHORIZATION
Error 8 (0x8): GATT CONN TIMEOUT
Disconnected

RE: BLE DFU example is not connectable

mredp — Wed, 06 Nov 2019 10:08:45 GMT

Ok I solved it,

I needed to change these lines in the sdk_config:

#define NRF_DFU_ANT_MTU 1024
#define NRF_DFU_BLE_MIN_CONN_INTERVAL 12

#define NRF_DFU_BLE_MAX_CONN_INTERVAL 12

Change them to:

#define NRF_DFU_ANT_MTU 247
#define NRF_DFU_BLE_MIN_CONN_INTERVAL 10

#define NRF_DFU_BLE_MAX_CONN_INTERVAL 15

Changing just the MTU or Just the connection interval didn't work. I had to change both.

I am not 100% certain why this is necessary, I assume my phone can only handle certain values?