DFU 3 Nrf52840DK over ble Mesh "serial connection"

[cedriczou]

Hi there,

We would like process to process a Mesh DFU   

Mesh: I dont know if I can call that a mesh but it's basically 4 52840_DK connected in serial over BLE using nRF5_SDK_15.2.0

GateWay -->Node1-->Node2-->Node3

periph --->central --->periph --->central

I saw different Mesh DFU example but I didn't find anything based on my topology because it's not really a mesh 

I got this feeling that I have to process those different steps to perform this task such as :

1 download image from the server and store in Gateway (external flash) 

2.transfer store (external flash) and forward the image all over the mesh.

3 then process the DFU from image stored in the external flash using the Library DFU Background 

Any recommendations, suggestions or examples will be welcome.

Thanks

[tesc]

Hi,

The Mesh DFU solution is specific to nRF5 SDK for Mesh, and uses a similar and parallel network to the Bluetooth mesh network for transferring the upgrade. It is only suited for use with a Bluetooth mesh network, not with other network types.

What you describe is a topology of standard BLE devices connected to each other as peripherals and centrals.

What you can do for your use case, is to use Secure DFU Bootloader from nRF5 SDK.

Regards,
Terje