Smp client for dfu

[Lorenz898989]

Hello, everyone.

I would like to use mcumgr to update the firmware of a nrf52 via another nrf52 over uart.

From the documentation I understand that smp supports uart so in theory it should be possible to do.

In practical terms I need an SMP server capable of receiving an update (and so far there are various examples (well done btw)) and an smp client capable of sending the update (of which I cannot find the example).

So far I have found only one smp client example, BT only and only for advertising/echo example.

Can you help me in any way?
Thanks

Best

Cristian

[Hung Bui]

Hi again Lorenz, 
I think I misread your question. You are not asking for BLE DFU client but UART DFU client. 
In that case you can have a look at this : https://github.com/hellesvik-nordic/samples_for_nrf_connect_sdk/tree/main/bootloader_samples/client_smp/smp_client_uart

Here is some extra instructions: 

If you want to test it, move the app.overlay from that project to MCUBoot SMP simple sample to use as an SMP Server.

Then connect P0.01, and P0.00 RX/TX swapped on two nRF52840DKs to each other and press Button 1 on the SMP Client to list images from the SMP Server.

Only the "Image List" works so far, but it shows that it is possible to send and receive SMP messages over UART.

[Artnia]

Hey guys,

I also need the UART DFU Client which I want to run on an MCU. The link you posted above is dead. Could you please provide a valid one?

Thanks.

[Hung Bui]

Hi Artnia, 
The sample was removed because there is a native driver for it in Zephyr. Please take a look here: 
https://github.com/zephyrproject-rtos/zephyr/blob/main/subsys/mgmt/mcumgr/transport/src/smp_uart.c

[Artnia]

Hi Hung Bui,

thanks for the quick reply.

How would the setup be for using/testing this?

I have an nRF52833-DK running an app + bootloader as descibed in exercise-1-dfu-over-uart. This is the device to be upgraded. With mcumgr command-line-tool I am able to perform UART DFU from a PC as host. Now I want to do the same with an MCU (e.g. another DK) as host. Hardware is clear (swapping RX/TX of two DKs) but how do I configure the software on the DK that would run as host?

Thanks.