How to do OTA of the nrf52840 peripheral device using Linux based gateway having nrf52840 central device

[Bhavya Mathukiya]

Hi Team,

I want to perform an OTA of my nrf52840 based peripheral device using the Linux-based gateway which is having the nrf52840 module interfaced. I know I can perform OTA of the device using the nrfConnect mobile app but I want to do it by my Linux-based gateway. Is there any reference or example code from nordic which is doing the same thing I am looking for?

Thank you,

Bhavya

[Einar Thorsrud]

Hi Bhavya,

Nordic does not provide a native DFU master implementation for the nRF5 SDK bootloader for Linux (or Windows or Mac). However, if you use the connectivity firmware on the nRF module that is connected to the Linux gateway (same as is used by nRF Connect BLE), you can use nrfutil to do DFU.

Einar

[Bhavya Mathukiya]

Hi Einar,

Thanks for the speedy response. I am using the Zephyr Bluetooth controller on the nrf module(nrf52840) connected with the gateway. Do you know nrfutil is working for it?

Regards,

Bhavya

[Einar Thorsrud]

Hi Bhavya,

No, nrfutil does not work with that. In that case you either have to switch firmware on the nRF when you want to do DFU, or you need to implement a DFU master yourself. You could look at nrfutil or some of the other implementations we provide for reference in that case.

[Bhavya Mathukiya]

Hi Einar,

Can you please provide me with any documentation where DFU Master flow/sequence is mentioned. I have to implement DFU master application for my project. I have also started looking into nrfutil source code.

Regards,

Bhavya

[Einar Thorsrud]

Hi Bhavya,

The DFU protocol is documented here.