nRF52833 Central to Peripheral OTA upgrade

[hardikp]

Hello,

We have studied the getting started guide for the OTA upgrade at the link below.

https://devzone.nordicsemi.com/nordic/short-range-guides/b/software-development-kit/posts/getting-started-with-nordics-secure-dfu-bootloader

In our system, we will be using the nRF52833 module as a central node and multiple peripheral nodes will be connected to it one by one. At a time only one peripheral will be connected to the central node. In our system, we are not using any Mobile phones.

The central node will be connected to the ESP32 Wi-Fi module over the UART interface. So using the DFU Master code example we will be able to upgrade the central node.

Is there any document or example available which guides us to develop the OTA upgrade of peripheral nodes from the Central node?

 

[Hung Bui]

Hi Hardik, 

Unfortunately we don't have an example for doing DFU OTA from one nRF52 to another. You would need to refer to our DFU protocol documentation and the mobile app / nRF Connect application on PC and write your own code. 

But I don't think it would be much different from the UART DFU master code that I provided in the link you pointed to. 

[hardikp]

Thanks, Hung Bui.

Yes, we will develop our own code. It seems that we need to understand the OTA upgrade protocol and develop the mechanism on the Central node to send the firmware binary to the peripheral node, which means cloning the nRFConnect upgrade module in central node software.

Where can we download the source code for the nRFConnect android/PC application? Is it available?

[Hung Bui]

The source code for nRF Connect on Android is not available. But the source for nRFToolbox and the DFU module is available here. https://github.com/NordicSemiconductor/Android-DFU-Library and here:https://github.com/NordicSemiconductor/Android-nRF-Toolbox

The source for nRF Connect on PC is here: https://github.com/NordicSemiconductor/pc-nrfconnect-ble

Capturing a sniffer trace of a DFU session would be very helpful to get an insight about the process. 

[hardikp]

Thanks, Hung Bui.

[hugzy123]

Hi,

We're also looking at implementing this sort of solution (a central updating multiple peripherals via DFU). Hung Bui Does Nordic have any plans for adding this as a feature in the future? Or creating an example with this functionality, such as the BLE central update over UART?

Thanks,