Set Fixed Connection Interval and Event length on Central Side

RE: Set Fixed Connection Interval and Event length on Central Side

Sigurd — Mon, 31 Jan 2022 22:23:04 GMT

You can setup several conn_cfg_tag with different event_length and choose between them in runtime. (when establishing the link, can't change it in the middle of a connection)

https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.s140.api.v7.3.0/structble__gap__conn__cfg__t.html

RE: Set Fixed Connection Interval and Event length on Central Side

User1321 — Mon, 31 Jan 2022 16:45:25 GMT

great, thank you!
What about the change of the event_length? is it possible to change it at run time, without the need of rebuilding the application? My question is related to both central and peripheral case.

RE: Set Fixed Connection Interval and Event length on Central Side

Sigurd — Thu, 27 Jan 2022 15:52:27 GMT

Hi,

I assume you use the Connection Parameters module. If the initial received parameters are not acceptable by the peripheral(not within max/min), it will send a connection parameters update request to the central, with the preferred connection parameters.

As the central, you control the initial connection interval. Set the max/min values used in sd_ble_gap_connect() to the same value, and make sure that this value is within the peripheral max/min limit, then you don't have to do a connection parameter update.