How to configure/query the Transmit Window Size

[Jerod]

Searched -- without success -- the SDK docs extensively for access to the Transmit Window Size.

Wondering if there are ways we can manipulate it, and query the current value?

Aside: the only reference I can find to it, is in an include "btle.h" file found in the nRF51-multi-role-conn-observer-advertiser on github -- which I suspect is a more generic BLE file than nrf-specific.

[Hung Bui]

Hi Jerod,

No, it's not possible to for the application to modify the Transmit Window Size with our softdevice. You may need to use the radio and handle the connection directly to be able to do so.

[Jerod]

Thanks. Feature Request for future? :-)

[Hung Bui]

@Jerod: If possible could you talk a little bit more on your use cases ?

[Jerod]

We have a low latency proprietary protocol in conjunction with timeslot API. Finding that "block" times for BLE while establishing connections are quite long (30ms). Was hoping to experiment with these window sizes on both ends to try different methods to attack the problem. Currently connection window and slave latency don't appear to help in the ways we hoped.

[Hung Bui]

You meant "block" time was the time BLE is blocked because of your timeslot ? or it was BLE who block the time slot ? a BLE event should not take that long time, it should be about 6-7ms maximum.