L2CAP Peripheral iOS/macOS Example

[horho77]

This PR adds a simple iOS/macOS L2CAP peripheral example that echoes received data back to the central device.

• The example uses a GATT service to dynamically publish the PSM on channels compatible with the iOS/macOS CoreBluetooth library

• L2CapDemo project can be used for basic testing

I'm not sure this is unique enough to be justified to be in examples. Let me know.
Thanks 😊

[lulf]

Could you perhaps modify the l2cap peripheral example to publish the gatt service instead?

[horho77]

Could you perhaps modify the l2cap peripheral example to publish the gatt service instead?

Are you suggesting to modify both peripheral & central L2CAP examples to use the "dynamic PSM" by default? Just to make sure I understand your comment right....

[lulf]

Could you perhaps modify the l2cap peripheral example to publish the gatt service instead?

Are you suggesting to modify both peripheral & central L2CAP examples to use the "dynamic PSM" by default? Just to make sure I understand your comment right....

Yes, that's correct. If structured in a way that makes it possible to "rip out" the gatt part if needed. The trouble-host features needed to use gatt are already there so I don't think it will make them too noise. And it's easier to maintain than another example.