RE: Using pc-ble-driver in a C# app with large number of notifications from the peripheral is slower

Einar Thorsrud — Thu, 14 Oct 2021 12:45:26 GMT

Hi,

[quote user=""]Are there any known limitations of using nrf52840 with large number of notifications?[/quote]

Not per se. But incoming data must be buffered and processed fat enough.

[quote user=""]Are there any configuration in pc-ble-driver or the connectivity FW in the dongle that is limiting the number packets?[/quote]

There is significant delay and overhead in the serialization, which probably explains this. I doubt you will be able to increase the number of notifications per connection event further.

Update: double check that the event length is as long as you want it to be (essentially the same as the connection interval for maximum throughput). See for instance how NRF_SDH_BLE_GAP_EVENT_LENGTH used in the NUS client example.

[quote user=""]Are there any known windows issue that slows it down?[/quote]

Not that I am aware of.

[quote user=""]Any other ideas?[/quote]

Is it possible to change the conditions so that you send fewer notifications with more data instead?