Is the SDP only for the BR/EDR?

[bernerd]

HI,ALL

I want to ask that if the SDP is only for the BR/EDR?

Bear Reguard

Bernerd

[bjorn-spockeli]

Yes, in Bluetooth Smart (formerly known as Bluetooth Low Energy) its the GATT(Generic Attribute ) Profile that is responsible for service discovery, see this article on GATT and the ATT protocol.

Quoted from the article:

Since GATT puts all service details on ATT, there is no need for a separate service discovery protocol (SDP), like we have in BR/EDR. The ATT protocol is used for everything: disconvering services, finding services' characteristics, reading/writing values, and so on.

-Bjørn

[Thangaraj]

Hi Bjorn, from BLE specification BR/EDR refer to classic bluetooth not Bluetooth low energy.

[bjorn-spockeli]

No, Bluetooth LE does not use the Service Discovery Protocol(SDP) for Service Discovery, it uses the ATT protocol. Please see my updated answer.

[Thangaraj]

Hi Bjorn,

Thanks for making it clear, I have understood it wrongly still now . In LE we discover services using ATT not a seperate SDP protocol.

Thanks,

[bjorn-spockeli]

Happy to help!