Buttonless DFU single bank SDK11

RE: Buttonless DFU single bank SDK11

sonnyz — Tue, 06 Apr 2021 16:57:02 GMT

Yes, so far so good! thank you for the help!

RE: Buttonless DFU single bank SDK11

Hung Bui — Tue, 06 Apr 2021 16:17:03 GMT

Hi Sonny,

Glad to hear. I assume that everything is good now ?

RE: Buttonless DFU single bank SDK11

sonnyz — Tue, 06 Apr 2021 13:44:56 GMT

Thank you Hung for the reply! Regarding the connection issue, probably it caused by using a wrong version of nrfutil. After making the file with version 0.3.0, it not happen anymore.

RE: Buttonless DFU single bank SDK11

Hung Bui — Tue, 06 Apr 2021 09:37:32 GMT

Hi Sonny,
"DFUTarg" only appear right after the Nordic_HRM switches to the bootloader. This period may last only a few ms as the bootloader will be connected by the phone immediately after advertising.

How often do you experience the issue that the device hang ? Could you get any logging from the device to check at which stage it's stuck ? After the power reset would it run the old firmware or the new firmware ?

To debug this the best way is to add some logging in the bootloader to check if it stuck at any stage.

The reason nRF Connect on PC doesn't work could be that the support for legacy DFU is removed. I will need to check with the team on this.

RE: Buttonless DFU single bank SDK11

sonnyz — Mon, 29 Mar 2021 21:51:05 GMT

Hi Hung Bui,

Now I'm able to perform DFU by the same process I described above with nRF Connect mobile (desktop app still not working).

What make me confused is that I have never seen "DfuTarg" was advertised during the DFU process as described here. And it also happened a few times that when the connection between the app and the device was lost, I found the device neither advertise as "Nordic_HRM" nor as "DfuTarg", and I know it's not bricked since the LED is still lit. So the only thing to make the device advertise again is a power reset. While for a buttonless application this is not practical. How to deal with this situation?

Thanks again!

RE: Buttonless DFU single bank SDK11

Hung Bui — Sat, 27 Mar 2021 21:58:47 GMT

Hi Sonny,

From what you described the DFU buttonless should work.

Could you try to debug the application and check if it asserts ?
When you execute a write 0x0104 (note that you may need to write 0401 as the endianess is little endian. )

You can add a break point inside ble_dfu_on_ble_evt() in ble_dfu.c and check the BLE_GATTS_EVT_RW_AUTHORIZE_REQUEST event to see if the command is parse correctly.