An OTA process on nRF52840

[Hardik Prajapati]

Hello Team,

I am new to the OTA process for nRF52840. Please help me with the below query.

1) Is it possible to perform the OTA over BLE and over thread network as well?

2) I have a setup like a border router(with NCP connected), two other end devices(or routers) working on nRF52840 DK. So is it possible to upgrade my DKs from the border router? considering they all are in the same thread network.

Any help would be highly appreciated.

Thanks,

Hardik

[Jørgen Holmefjord]

Hi,

1. Yes, we support DFU over BLE with our BLE Secure DFU Bootloader, and DFU over Thread with our Thread Secure DFU protocol solutions. It is theoretically possible to support DFU over both BLE and Thread protocols using Multiprotocol support, but we do not provide any examples or bootloaders with support for this. 
2. Yes, the Thread Secure DFU protocol allows you to update the end devices/routers over the Thread protocol. The solutions supports background DFU with multicast option, allowing you to update many devices at once, and allow the devices to continue to operate while receiving the update. Note that the current solution does not allow the DFU packets to be transferred over the NCP used in border router configuration simultaneously. Thread DFU can be done over a second NCP device, together with the nrfutil command line tool. If you have two NCP device connected to the border router, you should be able to operate both DFU and border router features concurrently.

Best regards,
Jørgen