BT LE param renegotiate slow with high slave latency

[Rein G. Bentdal]

Hi,

I am creating a low power BT device, and want to renegotiate connection interval dynamically to further reduce power consumption.

But I have noticed this renegotiation takes a very long time if the slave latency is set to a high number (499). And the time it takes to renegotiate seems to be proportional to the currently negotiated interval. For example a negotiated connection interval of ≈25ms might result in renegotiation taking ≈16s.

To me this sounds like my peripheral device does not temporary disable slave latency during this renegotiation. Might I be correct in this reasoning? Are there any workarounds, or would it be considered a bug? Let me know if I should provide demonstration code and data for further investigation.

Best,

Rein

[Vidar Berg]

Hello Rein,

The peripheral latency value will affect the time it takes to update the connection paramaters, please see my answer in this thread:  How does the SoftDevice Controller decide the connInstant when sending LL_CONNECTION_UPDATE_IND  

Best regards,

Vidar

[Rein G. Bentdal]

Thanks for the clarification