Max number of Report ID for HID over GATT (Custom Generic HID over GATT)

[Jose Pablo Castro Valverde]

Hi everybody,

I been experimenting with the HID over GATT example (mouse), and I am trying to use more than 3 report IDs.
When I used only 3 there's no problem.

But when I tried 4, the project compiled and run, but the descriptor is not properly passed to the host (I am using wireshark to validate the packets transactions).

There is any limit of the numbers of reports id it's possible to use in the current implementation? (I am using SDK 16.0)

It's that the case then, it is possible to have more than one BLE_HIDS_DEF instance running concurrently?

I really need more than 3 report ids.

P.S: I already tried to change this:
...
err_code = sd_ble_gap_appearance_set(BLE_APPEARANCE_GENERIC_HID);
...

but the problem persist.

Thanks and Best Regards,

[ovrebekk]

Hi Jose

Thanks for sharing your results. 

I will ask one of my more Linux proficient colleagues if this is a known issue. 

Do you know which version of bluez you are running in Ubuntu 18.04?

Best regards
Torbjørn

[Jose Pablo Castro Valverde]

Hi Ovrebekk.
This is what it says synaptic

I hope it will be useful.

Keep me posted if this is a know issue.

Meanwhile I keep debugging on the VM. I already make it works with an open source driver. My Open 3D Mouse make Blender and FreeCAD rotate when I push a buttons. It still needs more debugging, but I am moving forward.

Thanks and Best Regards,

Jose

[Jose Pablo Castro Valverde]

Hi Ovrebekk.

I got another question.

I am trying to send a sequence of packets but I failed when I send more than 5 packets.

There is any event or flag I should wait until send the next packets? 

Thanks and Best Regards,

Jose Pablo

[ovrebekk]

Hi Jose

Did you check the return value of the send function?

If the buffers in the stack fill up you will get a specific error code (NRF_ERROR_RESOURCES), and you need to wait for a TX complete event to occur before you can send more data. 

Best regards
Torbjørn

[Jose Pablo Castro Valverde]

I checked but it does not indicate any error.
I am studying the keyboard example that used a buffer to avoid the stack to fill up.

Any suggestion of how to do it?

Thanks and best regards,

Jose Pablo