mcuboot over modbus

[Lorenz898989]

Hello everyone

I am implementing a device network that communicates in modbus rtu (both master and slave).

I would like to be able to update the firmware of my devices via modbus instead of doing it OTA BLE, in McuBoot context (i have more than 1000 device a lot of networks in different facilities).

I would like your opinion on the easiest method to do this.

At the moment I have considered two scenarios:
scenario 1: implement a custom layer next to the UART module inside nrf_dfu_transport (see documentation link)
scenario 2: send update_device.bin over the network and manually write the data to the unused flash partition and manually handle the integrity check, put the partition dangling and force a reboot.

What do you think?
Any better ideas?

I searched the web a bit but couldn't find much to copy

best

[Sigurd]

Hi,

At the moment I have considered two scenarios:
scenario 1: implement a custom layer next to the UART module inside nrf_dfu_transport (see documentation link)
scenario 2: send update_device.bin over the network and manually write the data to the unused flash partition and manually handle the integrity check, put the partition dangling and force a reboot.

What do you think?
Any better ideas?

A custom transport layer sounds like the best approach IMO.

[Lorenz898989]

Hi

I'm refactoring smp_uart and mcumgr_uart in order to work as modbus object. My need now is to have an nrf52 as client (master modbus) in order to send to server (slave) my update. Is there a demo example like nrfutil in order to execucte an image update from a board (like nrf52dk) instead of my computer? 

[Sigurd]

Hi,

This in-progress PR might give you some ideas on how to do it.

https://github.com/nrfconnect/sdk-nrf/pull/8839