"Fast Advertising", "Slow Advertising", and indefinite advertising.

awneil
4 months ago

Is there any actual difference between "Fast Advertising", and "Slow Advertising" - or is it just a way to easily specify two different sets of timing parameters?

The question has been asked before; eg,

https://devzone.nordicsemi.com/f/nordic-q-a/16843/slow-fast-advertising

https://devzone.nordicsemi.com/f/nordic-q-a/12165/fast-advertising-and-slow-advertising (documentation link broken)

https://devzone.nordicsemi.com/f/nordic-q-a/8502/fast-vs-slow-advertising-where-is-the-border-between

But I don't see an answer to that question.

Also, how to specify indefinite advertising; ie, with no timeout?

Various threads have suggested that a timeout of zero should do it:

https://devzone.nordicsemi.com/f/nordic-q-a/7344/infinite-slow-adversiting

https://devzone.nordicsemi.com/f/nordic-q-a/7320/infinite-advertising-with-sd-8-0-0

But I can't see anything in any documentation which actually states that this is so.

Current (15.3.0) online Documentation: https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.3.0/lib_ble_advertising.html

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  • 0 4 months ago
    Andy said:
    As far as I know it's just a convenient featur

    Yes, that does seem to be the case.

    It would be good to have an explicit statement - especially as it's used in the context of Directed advertising - which is something different.

    I've also seen it suggested that slow advertising is "low power" - but unclear if that's purely because it is slow, or if there are other "special measures" to make it so ...

    Andy said:
    With regards to the timeout value, you can find the documentation here

    Thanks.

    But I can't see that mentioned or linked anywhere in the documentation of the slow or fast advertising parameters?

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