Need a replacement for mpsl_radio_notification_cfg_set, which is no longer available

[Jon]

Hi,

We have a product in production which uses the mpsl_radio_notification_cfg_set() function along with a callback to control an external GPIO when thre is radio activity. We do this to enable an external switcher supply while the radio is in operation, since we also make use of a high-power PA and selectively enable the switching supply only when the radio is operating.

We need an alternative to this functionality. Can you please help us to understand what alternative is available?

Thanks,

Jon

[Elfving]

Hi Jon,

Looks like it has been dropped, though there are alternatives, like what was also mentioned the case I linked to as well as for instance this one.

Would any of these alternatives work for you? What NCS version are you using?

Regards,

Elfving

[Jon]

The Bluetooth Event method will not work, since we are using Thread and Bluetooth and need these events for Thread. The Radio START and STOP events might work, but with MPSL notifications we were using a MPSL_RADIO_NOTIFICATION_DISTANCE_200US so that we received the event early enough to turn on our power supply before radio operation actually started.

[Jon]

NCS Version 2.7

[Elfving]

It might be that the options you have in NCS 2.7, as well as the current later versions of NCS, might not have a easy go-to replacement that does everything you need it to.

Could you expand a bit on why you need to port your application to NCS 2.7? Is staying in the previous version an option for you?

Regards,

Elfving

[Jon]

Staying on a previous version of NCS is not an option as we are supporting Matter on our product and need to move to Matter 1.4 (which is tied to NCS 2.7 on Nordic platform)

[Elfving]

Just to clarify, I assume you mean Matter 1.3? 

[Jon]

Actually, we are on Matter 1.4, since we are using the Matter repository directly from https://github.com/project-chip/connectedhomeip

[Elfving]

Hi again Jon, 

Jon said:

Actually, we are on Matter 1.4, since we are using the Matter repository directly from

I see. I assume btw that you need notifications on not just connections, but advertisements as well?

We are currently working on a similar case, in which it was suggested to use this function. The relevant R&D is already using this API to control a FEM, so I am not immediately seeing why this shouldn't work for you. This API that can be used to get notifications on all events, including the advertising events. 

A coworker of mine is currently testing this to make sure that this would work for the other customer, but I guess you do not have to wait for that. Feel free to give it a go in the meantime.

Regards,

Elfving

[Elfving]

Hi Jon,

So my coworker is done testing this, and he managed to set up so that I get events for the advertisements. The bad news is that it is not possible to start this before you start advertising. And it is similar with a connection it seems - you need to have a connection before you can get notifications for it.

I can send you my coworkers implementation for this if you would like. Have you gotten any further on your side?

Regards,

Elfving