Nrf52840 DFU Over thread uses single or dual bank update ??

[kpyush]

Hi There,

I just want to confirm which method is being used to perform DFU over thread (Single bank update or dual bank update), and can I perform DFU on Sleepy end device as well.? ( do you have any estimate how much overhead in power consumption will be added if DFU client runs on the Sleepy End Device).

[Edvin]

The bootloader in the Thread SDK supports dual bank updates. Look in the file:

nRF5_SDK_for_Thread_and_Zigbee_v1.0.0\examples\thread\dfu\bootloader\pca10055\blank\config\sdk_config.h

There is a define called NRF_DFU_FORCE_DUAL_BANK_APP_UPDATES, initially set to 0. If you set this to 1, then the DFU will not be accepted if there is no room for Dual Banking.

Regarding the power consumption, I am not sure. I don't see a reason why DFU will not work on SEDs (Sleepy End Devices). You have to have a way to enter the bootloader. When it is in bootloader mode, it will not be a sleepy end device, until it either receives a new application (which may be a sleepy end device application, or not), or the bootloader disconnects and times out.

Best regards,

Edvin

[kpyush]

Thank you for reply .. i am using nrfutil on raspberry pi to perform the DFU over thread.. but unfortunately i am not able to achieve it on Rpi. Please let me know how can I use nrfutil to perform DFU from rpi or cloud.  As you have mentioned in the documentation that DFU server can run over Mobile and cloud as well. 

[Edvin]

Have you tried it on a computer first? Just to figure out whether the issue is in the RPi setup or the DFU package transfer.

[kpyush]

I have tried on computer it works fine... in the rpi the issues comes in DFU package transfer while flashing the NCP firmware. That raises another question if I have already NCP flashed with border router then do we  need flashing the NCP.  I am trying to achieve DFU from Rpi...if not possible from cloud.

[Edvin]

Hello,

What is the problem when you use nrfutil on the RPi? Are you able to run nrfutil? When you try to perform it, what error does it give, if any?

BR,

Edvin