When the scan request to scan address question.

byungil yang

During scan request, scanA is sent to peripheral. TxAdd is customized as public when it's 0, and random when it's 1.
But there is no exact definition.
At what condition does TxAdd or RxAdd result in 0 or 1?
While scanning through the gap.h header file.
Is it related to the public or part of the random address?

Thanks for reading.

/** @defgroup GAP_ADDR_TYPE_DEFINES GAP Address Types
* @{
*/

#define ADDRTYPE_PUBLIC 0x00 //!< Use the BD_ADDR

#define ADDRTYPE_STATIC 0x01 //!< Static address

#define ADDRTYPE_PRIVATE_NONRESOLVE 0x02 //!< Generate Non-Resolvable Private Address

#define ADDRTYPE_PRIVATE_RESOLVE 0x03 //!< Generate Resolvable Private Address

/** @} End GAP_ADDR_TYPE_DEFINES */

over 10 years ago

0 JXS over 10 years ago

TI__Guru** 105180 points

Hello,

Please see the definition below for random address, found in BT Core Spec v4.0, Vol 3, Part C:

10.8 RANDOM DEVICE ADDRESS
For the purposes of this profile, the random device address may be of either of the following two sub-types:
• Static address
• Private address.

The term random device address refers to both static and private address types.

Best wishes

0 byungil yang over 10 years ago in reply to JXS

Prodigy 30 points

Thank you for quick response.
But I do not think the answer I wanted.

0 byungil yang over 10 years ago in reply to JXS

Prodigy 30 points

I will question again.
Please see the BT Core Spec v4.0, Vol 6, Part B
2.3.1.1 ADV_IND
The TxAdd in the Flags field indicates whether the advertiser’s address in the AdvA field is public (TxAdd = 0) or random (TxAdd = 1).
what dose this mean???
And that is going to change what conditions?

0 JXS over 10 years ago in reply to byungil yang

TI__Guru** 105180 points

If you are broadcasting your device's public BD_ADDR (BT Address), then TxAdd=0. Otherwise, it's a random address and TxAdd=1.

I hope this helps.

Best wishes

Bluetooth®︎

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When the scan request to scan address question.