periodic advertising

[Ridhi]

https://www.novelbits.io/bluetooth-5-advertisements/ i have followed this. want to know in simple words how periodic adv is helpful in contrast to simple advertising

[Einar Thorsrud]

Hi,

Novel Bits have a good description of Periodic Advertisements here (search for "Periodic Advertisements"). In short periodic advertisements allows you to synchronize the advertiser and the observer so that the observer knows then the next advertisement packet comes etc. This is somewhat similar to data exchange in a connection, but with some major differences. Firs of all, it is still advertising, so no retransmission etc, so data loss will occur. Secondly, several observers can receive the same periodic advertisement packets.

[Ridhi]

Thankyou. 

Can you assist me in implementation example of BLE Extended advertisement in nrf52. https://blog.nordicsemi.com/getconnected/bluetooth-5-advertising-extensions is not helping much. Pls share some example where advertising extension is implemented in nrf52832/40

[Ridhi]

i dont want to use zephyr actually... pls send me example of extended advertising in nrf52 sdk 17

[Einar Thorsrud]

The SoftDevice and nRF5 SDK does not support periodic advertising so that is not an option (assuming that is what you want when you use the board term extended advertising). The SoftDevice does support some other extended advertising features though, but then it is key to know which features you actually need.

[Ridhi]

eg :i want to send about 80 bytes of data so how to do this using nrf5 sdk...with extended aux adv

[Einar Thorsrud]

You can refer to the Running Speed and Cadence Application for an example of extended advertising. The length can be up to 255, see this post.

[Ridhi]

thankyou 

i am able to run this example and see the advertising on my ios. But when i am tracing it using nrf sniffer app i am not able to find it...what is the issue

[Ridhi]

also i want to have AUX_ADV_IND PDU packet how will i get it?

[Ridhi]

pls tell what is length here

[Einar Thorsrud]

Hi,

The nRF Sniffer does not support extended advertising, so you cannot use it in this case. It is better to test with a recent phone (that supported advertising extensions), as described in this post.