Slow master DFU implementation over BLE

RE: Slow master DFU implementation over BLE

EbonyH — Fri, 05 Jun 2020 22:31:22 GMT

We have a similar project that needs to do the DFU via master over the BLE. Can you share your project?

RE: Slow master DFU implementation over BLE

Vincent Smf — Mon, 25 May 2020 15:27:02 GMT

PRN is not set to 1. Thank you for the explanation. I will try to give feedback as soon I can debug.

RE: Slow master DFU implementation over BLE

Einar Thorsrud — Mon, 25 May 2020 14:16:47 GMT

Hi,

[quote user="Vincent Smf"]I do not understand what to check. When you said check bandwidth config, where is it setup ? I write my app from an hrs example (central side). [/quote]

If still using SDK 11 with a version 2.x.x SoftDevice, you use the options API to set the bandwidth configuration (search for "BLE_CONN_BW_HIGH" here to see an example of that.

[quote user="Vincent Smf"]Also, how to check the number of packets per connection event? Thks[/quote]

You need to use a sniffer to see this clearly.

I cannot say for sure if this is the issue, but if you check with a sniffer, then we would know more. Another potentially relevant parameter is the packet receipt notification (PRN) in the DFU protocol. Do you by any chance set the PRN to 1 in the "slow" DFU master implementation?

RE: Slow master DFU implementation over BLE

Vincent Smf — Mon, 25 May 2020 13:13:45 GMT

Hello,

I do not understand what to check. When you said check bandwidth config, where is it setup ? I write my app from an hrs example (central side).

Also, how to check the number of packets per connection event? Thks

RE: Slow master DFU implementation over BLE

Einar Thorsrud — Wed, 20 May 2020 14:17:19 GMT

Hi,

It could be several things, but the first thing I would check is the bandwidth configuration of the nRF that is acting as DFU master and also observe the link with a sniffer. How many packets is transmitter per connection event?