Sending advertisements with different settings at the same time

[takashina hiroki]

SDK: 15.3.0
SoftDevice: S132
Device: EYSHJNZWZ (nRF52832)

Is it possible to simultaneously send advertisements with different cycles, communication packets, etc.?
If so, how many different advertisements can be sent at the same time?

For example, we are considering the following settings for advertisements.
Advertise1: Period: 100ms, Device name: "AAA".
Advertise2: Period: 300ms, Device name: "BBB", iBeacon.
Advertise3: Period: 40ms, Device name: "CCC".

[Kazi Afroza Sultana]

Hello Takashina,

It is not possible to send advertisements simultaneously. You can have up to 20 connections but not these parallel advertising. Because the softdevice only has a single broadcaster (adviser) at a time. However, you can do this by reconfiguring softdevice(https://infocenter.nordicsemi.com/topic/sds_s132/SDS/s1xx/concurrent_multiprotocol_tsl_api/concurrent_multiprotocol_tsl_api.html?cp=4_7_3_0_8_1 ) but it is not advisable rather you can use nRF Connect SDK (NCS). NCS has supported multiple advertising since version 1.6.

Please let us know if you would like to know more.

Thanks.

Best Regards,

Kazi Afroza Sultana

[takashina hiroki]

I'm considering using the "Radio Timeslot API".
I have been able to send two different advertisements at the same time using this API.
I would like to know the maximum number of advertisements that can be sent simultaneously.
Can you please tell me?

[Kazi Afroza Sultana]

Hello,

Actually it depends on your implementation. If you use timeslot  Application Programming Interface (API), you have to implement everything. So, how many advertisers you can make is a conceptual thing. And one thing to be noted that there is still one radio; therefore the advertising can not be overlapped. It is not usual to get timeslot every time whenever you want it. It depends on what else the softDevice has to schedule, like connection(s) and the parameters of that connection(s). Here is blog post of concurrent advertising (+) Concurrent Advertising - Bluetooth low energy - nRF5 SDK guides - Nordic DevZone (nordicsemi.com) that you can look at.

Thanks.

Best Regards,

Kazi Afroza Sultana