RE: DFU over BLE mesh - reliability and speed

Hung Bui — Wed, 05 Sep 2018 08:11:04 GMT

It's 60 minutes to propagate the image through Mesh network.

RE: DFU over BLE mesh - reliability and speed

Igor — Wed, 05 Sep 2018 07:59:17 GMT

Hung Bui 60 minutes to upload firmware via UART or to propagate it through a Mesh network?

RE: DFU over BLE mesh - reliability and speed

Hung Bui — Mon, 28 May 2018 14:31:59 GMT

Hi John,

Actually there is no acknowledgements when the new image is populating through the network. The distributor distribute image packets one by one, each six times using trickle algorithm.

A node that missing a packet (base on packet ID) will send a request beacon to its neighbors to have the neighbors to help retransmit the missing packet or forward that request if they don't have). After 64 newer packets it still haven't received the missing packet, it will terminate and start requesting from the beginning (ready beacon).

You can have a look at the DFU packet format here

We haven't run a performance test for DFU with Mesh. But in our test here we updating 150kB of flash took about 60 minutes.