How big is the event buffer of the SoftDevice

RE: How big is the event buffer of the SoftDevice

Anders Strand — Tue, 01 Dec 2015 14:00:23 GMT

The disconnect will also be retransmitted by the initiator a certain amount of times. If it cannot get the disconnect packet through, it will time out and just drop the connection. In your end, you will then never receive the disconnect, but receive a supervision timout on the connection. The incoming advertisements will be lost if all event buffers are full. I am not sure if a separate event buffer is set only for advertising though.

RE: How big is the event buffer of the SoftDevice

Marius Heil — Tue, 01 Dec 2015 12:44:01 GMT

What happens with other events? Say: The Softdevice received 6 packets and its buffers are full, afterwards, the link is disconnected. Will the disconnect event be lost? And what about events such as incoming advertising data that do not directly belong to a link?

RE: How big is the event buffer of the SoftDevice

Anders Strand — Tue, 01 Dec 2015 12:40:54 GMT

Hello.

For the Softdevice S130, it is 6 events per link. If this buffer is full, the softdevice will start NACK'ing incoming BLE packets. These packets will be retransmitted until they are successfully sent. They will therefore not be lost.

-Anders

RE: How big is the event buffer of the SoftDevice

Marius Heil — Mon, 30 Nov 2015 14:45:26 GMT

Hello,

that's the way I'm doing event handling right now and it works, so I don't want to change it right now without any reason to do so. It's one of the proposed methods of the nordic SDK.

RE: How big is the event buffer of the SoftDevice

Wojtek — Mon, 30 Nov 2015 13:26:02 GMT

I don't know abput buffer, but why don't you use scheduler to buffer those events? You can change scheduler queue size in app.