enable/disable radio notifications on s110 v8.0

[Dave_couling]

I am looking to migrate to SDK 8.1 and S110 V8.0 and going through all the implications of that move. One key one is the current Bug with Radio Notifications on S110 v8.0. I have a timer which at expire, I enable radio notifications. After the next radio event I measure a sensor, then disable radio notifications and restart the timer. It seems on S110 V8.0 this can cause asserts. Thus Radio Notifications should be done at SD init. This doesn't really work for me as not I have to enable radio notifications all the time even though I only need them once every 20mins. Thus the CPU is waking up and consuming extra power when not needed. Is there a work around to this issue (DRGN-5556, NRFFOETT-986).

If I use the scheduler for my app_timers and do NOT require concurrent CPU and radio usage, could I be 100% sure that enabling radio notifications in the timer_handler would be 100% safe?

Thanks

DC

[Øyvind Karlsen]

Hi,

The radio notification will not work if it is initialized when the SoftDevice is not idle, to comply with your application we need some way to ensure that the SoftDevice is not active when we attempt to initialize radio notification.

One solution is to request a timeslot, and use that timeslot to do your measurement. For infomation and usage of timeslots see chapter 9 of the SoftDevice specification.

Best regards,

Øyvind

[Dave_couling]

But wouldn't using a scheduler event for enabling/disabling Radio Notifications assure that this occurs during Stack idle time?

[Øyvind Karlsen]

This is sort of what the timeslot does, it schedules an uninterruptable event for a period when the SoftDevice is guaranteed to not be active.