Android BLE for direct advertisment.

[Rohit]

Hi, I am trying to write a small android app to send direct advertisement to particular device. i am using 0001 for direct advertisment. But when i advertise the data, message is received for all the devices. can you let me know or share an example for this in android.

Thank you Rohit Iti

[RK]

There's no such thing as directed advertisement with data. The ADV_DIRECT_IND mode's payload consists only of the advertiser and initiator's device addresses.

Nor do I know what you mean by 'i am using 0001 for directed advertising', either way, if you are actually setting up ADV_DIRECT_IND then you shouldn't have any data in it. So if you do, I wonder if you are actually in the correct advertising mode.

Advertising packets are received by all devices. Advertised data is public.

[Rohit]

Hello RK, Thank you for your reply.

I searched through all the links and also int he bluetooth specification. We have to create packet containing the type of Advertisment , source and destination mac address.

here are some links which will tell us different type of advertisment and their message format.

1. www.argenox.com/.../
2. j2abro.blogspot.de/.../understanding-bluetooth-advertising.html