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androidbluetoothbluetooth-lowenergy
luckyging3r
luckyging3r

Reputation: 3165

How is the bluetooth low energy pairing method chosen Android

I am a little confused as to what level the Android or peripheral device requests the bluetooth low energy pair request type. Is this in the application layer when I initiate the connection via device.connectGatt(context, false, gattCallback) or would this be the job of the peripheral to suggest the type?

How can someone choose between Just Works, Numeric Comparison, Passkey Entry and Out of Band?

Upvotes: 2

Views: 732

Answers (1)

maze
maze

Reputation: 894

Both devices exchange their IOCapabilities at the beginning of the pairing process. The initiator send a IOCapabilityRequest and the responding device answers with a IOCapabilityResponse.

As the name says, the IO Capabilites contain data about what the device can show to the user. This can be one of "Display Only", "Display Yes/No", "Keyboard Only", "NoInputNoOutput", "KeyboardDisplay".

According to what both devices can do, they chose the method, see here:

https://blog.bluetooth.com/bluetooth-pairing-part-4

and

https://blog.bluetooth.com/bluetooth-pairing-passkey-entry

Upvotes: 3

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