Multiple Advertising - nRF Connect SDK

[Lukáš]

Hi, 

We are building an application where we want to use BT 4.0 legacy to advertise two advertising sets at different time intervals. I just saw this commit in Zephyr repository mentioning multiple advertising sets support. However, when I check include/bluetooth/bluetooth.h it seems that only Bluetooth LE advertising extensions are affected.

Is there planned support for multiple advertising sets for BT 4.0 legacy? Or is there some workaround on how to advertise multiple sets?

Best regards,

Lukas 

[Einar Thorsrud]

Hi Lukas,

By BT legacy, do you mean BT classic? If yes, this is not supported by any nRF HW, so it simply not possible. If that is not what you mean, could you clarify?

[Lukáš]

Hi Einar,

Yeah, I meant BT 4.0 (classic). So it is possible with Bluetooth 5 advertising extensions? 

[Einar Thorsrud]

Hi,

Not yet. The commit you referred to is only for the host part. The nRF controller only supports a single advertising set, and the Zephyr controller still does not properly support extended advertising.

[Lukáš]

Hi Einar,

so let's please recap this a little.

• Advertising multiple data sets on BT LE 4.0 are not supported in any nRF52 HW
• Advertising multiple data sets on BT LE 5.0 is HW supported in the nRF52 series, but it is not implemented in Zephyr and nRF Controller.  
• When Zephyr properly implements Advertising Extensions, multiple advertising sets should be possible.

Is it correct?

Lukas

[Einar Thorsrud]

Hi Lukas,

There is no HW limitation preventing multiple advertising sets. It is simply that it is not supported in software at this point.