How to replace an image over BLE with SMP_DFU services ? and how smp_dfu works ?

[Piwy]

Hi,

I use 2 nrf52840 custom board, one is use a peripheral sensor with a lot of services and the other is used as a central with bt_shell_command.

Now i need to be able to upgrade the firware over BLE. I succed to have the MCUbootloader in my peripheral and also i use this project for my central :

https://github.com/simon-iversen/ncs_samples/tree/master/central_smp_client_dfu

I succed to add this code in command shell, upload an image in my peripheral and also boot on it.

But this project is incomplete for a final product, i have a lot of question about the use of smp_dfu.

1) How to load the app_update.bin (the one that i upload over BLE in my peripheral) from an external flash and without J-Link commander ? i want to load it from usb (nrf52840 Dongle).

2) How can i erase it when i finish to upload it on my peruipheral ?

3) I succed to upload it on my peripheral but i have 2 image on it, i want to have juste the new one and erease the old one. How can i have just one image on my peripheral ?

4) To boot with the new image i need to reset my peripheral, how can i do it ? The project mentione it but there was a lot of mistakle in it and the reset part don't work

Best regards,

Pierre-Yves

[Sigurd]

Hi,

Now i need to be able to upgrade the firware over BLE

There are 2 officially supported ways to do that.

1) Use nRF Connect Device Manager app on your phone: https://www.nordicsemi.com/Products/Development-tools/nrf-connect-device-manager

2) On a computer running either Linux or macOS, use mcumgr command-line tool (on Windows there is no support for DFU over BLE in mcumgr). https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/zephyr/services/device_mgmt/mcumgr.html#mcumgr-cli

[Piwy]

Thanks you for your support.

I think there is a misunderstanding, i need to upgrade firware over BLE with my central device(nrf52840 Dongle as explain) and not with a phone.

I want to use the same way as the prject from github, this example is based on the sample smp_client.

Can you grive me advice, example or something else about my 4 questions ?

4) i add that i want to reset my peripheral with my central device over BLE.

[Piwy]

Hello,

Do you have any imformation about my questions ?

Now i understand that i need to configure my MCUbootloader, but i don't find example to configure it ...

Regards,

Pierre-Yyves

[Sigurd]

Hi,

Piwy said:

Now i understand that i need to configure my MCUbootloader, but i don't find example to configure it ...

You can see how it's done e.g. in this sample

https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/zephyr/samples/application_development/sysbuild/with_mcuboot/README.html

https://github.com/nrfconnect/sdk-zephyr/tree/main/samples/application_development/sysbuild/with_mcuboot