nRF51822 LMP feature support

[gillwei7]

Hi I using nRF51822, and want to know about the Nordic driver support LMP feature Do you have any document about driver support? Or any software development document except SDK document may help to check. Thanks!

[Carles]

Hi there,

What exactly do you mean by "LMP feature"? There is the LL Feature Exchange procedure, which is executed automatically by the stack without the application having to worry about it, and then there's LMP, the Link Manager Protocol, which is a BR/EDR only protocol and not applicable to BLE.

Carles

[gillwei7]

Thanks for your comment, sorry I didn't clarify my question clearly. Connecting with system with Linux BlueZ when I using "hciattach", initially it will send hci command "Read Local Supported Features Command", which can see from Bluetooth Vol.2 Part.E Ch 7.4.3, in spec also show that this is mandatory for LE controller,but I don't know the feature nRF51822 provides.

[RK]

Supporting the Read Local Supported Features is mandatory for all controllers including LE, however the return specifies the supported features for the local BR/EDR controller. In this case the local controller is LE-only, it should return no features (or an error) as there is no local BR/EDR controller. I assume it's only mandatory for consistency so you can find out what kind of host you're connected to.