Beacon Observer

RE: Beacon Observer

Jørgen Holmefjord — Fri, 25 Nov 2016 10:30:31 GMT

Hi,

When not in a connection, there are no way to ensure that any peripheral broadcast/advertising packets are received by any devices, or that a scanner/observer will ever receive any packets.

A device that support the observer role is only required to have a receiver and listen to devices broadcasting advertisements.
A device that support the central role is required to have a receiver and a transmitter. It should have the ability to listen for advertisements and initiate connections and serve as a master.

From this, you can see that an observer is quite similar to the central, with limited functionality. You will not get a different outcome from a observer application than you get from your central application.

I would suggest that you either try to tweak your advertisement and scanning parameters to receive more of the packets, or that you switch to a connected solution. If it's vital that you receive every packet from the peripheral, you need to enter a connected state.

What are your application, since you want to use an observer and need to receive every advertisement?

Best regards,

Jørgen

RE: Beacon Observer

Roger Clark — Fri, 25 Nov 2016 08:56:10 GMT

Just connect to the device and register as an observer

RE: Beacon Observer

Murugan — Fri, 25 Nov 2016 06:45:46 GMT

Advertising packets send every second but Central device receive every 5 seconds get one packet, here too much data loss.

RE: Beacon Observer

Roger Clark — Fri, 25 Nov 2016 06:11:16 GMT

I don't think you are guaranteed to get every advertising packet

If you want every packet you need to connect and be a true observer

Why do you need every packet ?

RE: Beacon Observer

Murugan — Fri, 25 Nov 2016 05:51:03 GMT

Hi Roger Clark,

Thanks for reply. All the central example are connectable. I want only scanning and display for peer address and RSSI value without missing advertising packets. Currently i am using NUS example but advertising packets are missing.

RE: Beacon Observer

Roger Clark — Fri, 25 Nov 2016 05:45:28 GMT

If its just a beacon, then I don't think you code acts as an observer, I think you just scan for becaons.

Try any of the ble_central examples e.g.

SDK_V12.1.0\examples\ble_central\ble_app_hrs_c

As this scans for a device with the HRS service, so could probably be adapted to what you want