How to subscribe to TWT wake event?

[galbh]

how can the application layer subscribe to TWT events so it knows when its the service period and the time to send/receive data? 

i'm using NCS v2.2.0

[Kenneth]

Hello,

I don't think this is possible today, but it's a good idea, so I have added an internal jira to look into this. 

Best regards,
Kenneth

[galbh]

the "promise" of TWT for IoT is that battery powered devices can sleep for hours and days. can you please explain how such application can work?

[Kenneth]

Hello again,

This feature is still work in progress, it does not work as intended yet. I would think that when in TWT mode, and if the application have data to send, it should be able to buffer the data and send it prior to the entire TWT period have elapsed. As of today this is not working as intended. 

Update: Looks like this is soon possible: https://github.com/zephyrproject-rtos/zephyr/pull/55454 

Best regards,
Kenneth