Slow DFU Process

RE: Slow DFU Process

Ron — Wed, 05 Feb 2020 15:17:29 GMT

Hey,

If I have a similiar problem, sometimes the OTA is slower, usually using nRF Connect it is fast, but sometimes it also slows down with nRF Connect.

This is an example of a slow nRF Connect OTA

Are the PRN and connect interval not fixed values? why would it change, and so dramatically, within the process? why would there be such differences between runs with the same application on both sides?

If I get sniffer logs what should I look for?

What kind of improvements can I make to my settings to get faster?

Thanks!

RE: Slow DFU Process

Hung Bui — Fri, 20 Dec 2019 12:26:12 GMT

Thanks for the information.
We need to find out what exactly cause slower communication.
Can you capture a sniffer trace when you do DFU on a fast and one on a slow computer ?
Have you tried to test doing DFU from a phone, for comparison ?

There are 2 things can cause the slow DFU update, one is the connection interval, and second is the notification setting (the confirmation on every N packets)

RE: Slow DFU Process

Aftab — Thu, 19 Dec 2019 14:34:06 GMT

nRFConnect is being used with nRF52840 dongle. Following bootloader is being used:

nRF5_SDK_16.0.0_98a08e2\examples\dfu\secure_bootloader\pca10056_s140_ble

RE: Slow DFU Process

Hung Bui — Fri, 13 Dec 2019 10:13:58 GMT

Hi Aftab,

Which tool did you use on PC to perform the DFU ? Which bootloader did you use ?