BLE beacons

RE: BLE beacons

awneil — Tue, 28 Jul 2020 13:48:04 GMT

[quote userid="73410" url="~/f/nordic-q-a/64256/ble-beacons/261987"]Does the headphones advertise and the mobile always scan for advertisment[/quote]

Yes.

Although headphones will be BT Classic - not BLE - which is slightly different.

Again, I think you need to do some basic reading-up ...

RE: BLE beacons

Roei — Tue, 28 Jul 2020 13:08:01 GMT

So how does it work with ble headphones, for example?

When turning the headphones on, there is a connection with the mobile. Does the headphones advertise and the mobile always scan for advertisment?

Thanks!

RE: BLE beacons

awneil — Tue, 28 Jul 2020 12:57:38 GMT

[quote userid="73410" url="~/f/nordic-q-a/64256/ble-beacons/261979"]I understood that the beacons have the ability to "wake" a mobile device[/quote]

No, they don't.

Again: the Central has to be scanning to see any advertising at all.

If the Central is not listening (ie, "scanning"), it will not hear anything!

EDIT

However, it could be that the Central has a "low power" mode where the only thing it's doing is scanning - which, as noted above, can be a (relatively) low power operation.

Then, when its scanning detects the advertising, it could wake the rest of the system into "full power" mode.

RE: BLE beacons

Roei — Tue, 28 Jul 2020 12:50:50 GMT

Ok,

One more thing - I understood that the beacons have the ability to "wake" a mobile device, even if it's on sleep mode. Is that right?

That will give me the option to send beacons to the mobile anytime, and that will trigger the mobile to start scanning, while my nrf device starts connection advertising.

What is your opinion?

Thanks!

RE: BLE beacons

awneil — Tue, 28 Jul 2020 12:29:51 GMT

A Central cannot see any advertising at all without searching for it!

But what makes you think this takes "a lot of power" ?

https://www.makeuseof.com/tag/5-myths-bluetooth-can-safely-ignore-now/

RE: BLE beacons

Roei — Tue, 28 Jul 2020 11:57:51 GMT

So do we have another solution for that?

How can the mobile recognize a connection advertisment without search for that and use a lot of power?

RE: BLE beacons

awneil — Tue, 28 Jul 2020 11:52:33 GMT

[quote userid="73410" url="~/f/nordic-q-a/64256/ble-beacons/261963"]Does it make sense[/quote]

Not really.

"beacon packets" are just BLE Advertising packets.

RE: BLE beacons

Roei — Tue, 28 Jul 2020 11:45:51 GMT

This is what I need:

When my nrf device starts advertising, the mobile should send a connection request.

The problem is that my device doesn't advertise all the time, only in specific cases. Therefore - I don't want the mobile to search for advertising 100% of the time.

So I'm trying the beacons solution. The mobile will recognize the beacons packets when it's in range, and only after that, the mobile will search for connection advertisment.

Does it make sense?

Thanks!

RE: BLE beacons

awneil — Tue, 28 Jul 2020 11:33:00 GMT

With older Android versions, the connectable/non-connectable status wasn't available - so I don't think that anything should rely upon it ... ?

See: https://devzone.nordicsemi.com/f/nordic-q-a/45644/how-do-i-simply-do-a-non-connectable-advert-on-nrf52-using-sdk-15/186788#186788

RE: BLE beacons

Roei — Tue, 28 Jul 2020 11:14:13 GMT

Ok,

But anyway, I couldn't understand - is it possible to send beacon packets and advertise for connection at the same time?

Thanks!

RE: BLE beacons

awneil — Tue, 28 Jul 2020 10:09:07 GMT

All beacons do regular, non-connectable advertising - that is the whole point of a "beacon".

https://en.wikipedia.org/wiki/Bluetooth_low_energy_beacon

"Eddystone" is a particular beacon standard - from Google:

https://developers.google.com/beacons/eddystone

Apple have their own standard - called, unsurprisingly, "iBeacon":

https://en.wikipedia.org/wiki/IBeacon

No doubt there are also other standards.

Perhaps you need to do dome more background reading on the subject of BLE beacons ... ?

RE: BLE beacons

Roei — Tue, 28 Jul 2020 10:01:37 GMT

Seems like ble beacons example contains regular advertisment.

Eddystone is a non connectable adversitment, which I think I need. Did I understand that correctly?

In addition - can I use eddystone advertisment as long as my application running, and use regular advertiament at the same time? Or it may be problematic?

Thanks!

RE: BLE beacons

awneil — Tue, 28 Jul 2020 09:54:31 GMT

Have you looked at the descriptions of the examples?

Which one best fits your specific requirements?