OTA DFU NRF5340

[kumanan]

Hi,

The below is our requirement for NRF5340

1. we have a DFU application with bootloader as an hex file

2. we have another app say blinky as an hex file

3. merge these two hex files and create a new hex file - using 

nrfutil pkg generate --hw-version 53 --application-version 1 --application ble_app_blinky_pca10056_s140.hex --sd-req 0xA9 --key-file private.key app_dfu_package.zip

4. using NRF connect in mobile load this merged hex file and flash it 

We are getting conflict in step 3

Please help us resolve this issue

[Simonr]

Hi

It seems like you are mixing the nRF5340 and nRF52840 here (the pca10056_s140.hex application is for an nRF52840 DK and a SoftDevice). I'm afraid the nrfutil tool won't work with nRF5340, as the nrfutil is designed for the nRF5 SDK, which the nRF5340 is not supported by. 

For the nRF5340 you would need to use nRF Connect SDK, and to do DFU over UART in the nRF Connect SDK you will need to use MCUMGR and the smpsvr. You can read about the MCUMGR command line tool here, and how to use it is described in the SMP server sample documentation.

Best regards,

Simon

[kumanan]

Thanks for the help.

We want todo On the fly upload of firmware in NRF5340

Can you please guide us in this process

1. using BLE

2. remote update

regards

Kumanan

[Simonr]

Hi Kumanan

Please check out the nRFConnect SDK DFU support guide made by my colleague here, alongside the nRF5340 user guide on FOTA upgrades and multi-image DFU.

Best regards,

Simon

[kumanan]

Hi Simon,

1. We have tried DFU as per the instruction it works

We he a question here,

Do we need to include DFU in every update?

2 ,next step on remote update

we are thinking of updating via cloud based distribution

like HawkBit. Can you please help us on this behalf

Is this right idea? can it work?

if you have any idea on this please throw some light

Best

Kumanan

[Simonr]

Hi

1. I'm not sure I understand the question. DFU means Device Firmware Upgrade, so it is the update. Are you asking if you need to update the bootloader every time you do DFU as well? That should not be necessary I think.

2. That is possible, but you'll need a device connected to the cloud that can get the firmware from the cloud onto the nRF53. This could for example be a phone, where you can use the DFU library for Android / iOS to send FW to your device, and the .zip could be gotten from the cloud for example. We don't provide any Android / iOS cloud-example for DFU. I assume different cloud companies have example code how you download things from the cloud to your smartphone app.

Best regards,

Simon