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In the Eddystone beacon spec the word 'slot' is used

The term 'slot' is used in the context of the Eddystone beacon specification.

I cannot find a definition of that word.

For example, the sample app from Nordic says "The example provides five advertising slots" and despite working in Bluetooth for 17 years I am confused :-)

Does it mean that if you have 5 slots, then each advert will contain one frame and so 5 adverts are required to advertise all of them, OR Does it mean that you can fit 5 AD elements in a single advert ( which means it will not fit in pre v5 adverts)

I think in my case the confusion comes from a little bit too much knowledge to be able to perceive the ambiguity.

Look forward to hearing from someone.

Note to Nordic guys: it may be worth putting whatever feedback comes back as a response to this in the Nordic Inforcenter page related to "Eddystone Beacon Application"

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  • Hello Mahendra Tailor

    As you have mentioned in your comments the slots refer to different advertisement payloads for the beacon. The beacon will then switch between the different payloads when it is advertising.

    Best regards

    Jørn Frøysa

  • I can see that when I enable multiple slots, each slot appears in an advert on its own. So when scanning you see adverts cycling through the number of slots.

    My confusion was knowing that two EIDs could fit in a single advert ( if you put the other in the scan response ) and so got stuck in the ambiguity.

    Then to make matters worse, when extended adverts start getting used in anger, a single advert will definitely be able to send out all slots in a single advert. Perhaps that is a bridge to cross when we come to it

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  • I can see that when I enable multiple slots, each slot appears in an advert on its own. So when scanning you see adverts cycling through the number of slots.

    My confusion was knowing that two EIDs could fit in a single advert ( if you put the other in the scan response ) and so got stuck in the ambiguity.

    Then to make matters worse, when extended adverts start getting used in anger, a single advert will definitely be able to send out all slots in a single advert. Perhaps that is a bridge to cross when we come to it

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