HID host multiple connections

[Stéphane Lenclud]

Hi,

Should the HID host be capable of handle multiple connections?

I was not able to get it working.

If one device is connected other devices can't connect.

I didn't get any HID event corresponding to the second connection coming in.

Cheers,

S.

[Stéphane Lenclud]

Ok I found this configuration option MAX_NR_HID_HOST_CONNECTIONS so I guess I should set it to something higher than one 😁

Does it need to match MAX_NR_HCI_CONNECTIONS? Should I also adjust other configuration option for best performance?

Could we get an event/notification when an incoming connection is denied because we have too many connection?

[Matthias Ringwald]

Hi Stéphane

MAX_NR_HID_HOST_CONNECTIONS does not match MAX_NR_HCI_CONNECTIONS, but it would make sense if HID is your main application.
You also need 2 L2CAP Connections for each HID Device.

Interesting point about the reject. At the moment, no service emits an event, as the connection gets rejected.
What would you do in your application if you get an event about a rejected connection due to resource limitations?

Best
Matthias

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[Stéphane Lenclud]

We could notify the user that too many devices are connected.

[Matthias Ringwald]

Hi Stéphane

We have extended the HID_SUBEVENT_INCOMING_CONNECTION event with a status field and set it to ERROR_CODE_MEMORY_CAPACITY_EXCEEDED
if allocation fails on the develop branch.

Please let me know if this helps.

Cheers
Matthias

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