Multiple BLE HID connection

[Anatolii]

Hello, Can your tell me is it possible make three  from one device at the same time ? If is not, can I make multiple connection with profiles which support multiple connection and then change one of them to BLE HID device with out of re-connection? Is it possible BLE HID work with USB HID at the same time.   My MCU made on NRF52840. My device is a keyboard which i need to connect to three PC at the same time.

with regards Anatolii

[Turbo J]

It is not possible to connect a USB keyboard to the NRF52840, since the chip does not support USB host mode.

[Anatolii]

I mean that the keyboard should be BLE HID and USB HID  at  the same time. Is it possible?
With regards Anatolii

[ovrebekk]

Hi 

It should be possible to use three different HID descriptors with associated endpoints, yes. Both the USB HID and the BLE HID libraries follow a object oriented design philosophy, to allow you to more easily set up multiple endpoints and descriptors. 

You can also combine BLE HID and USB HID in the same example. 

Best regards
Torbjørn

[Turbo J]

The NRF chip can talk to BLE and USB Hosts via HID, at the same time if the programmer knows what he/she is doing.

But it can not talk to an existing USB HID (keyboard), since 2 USB devices cannot talk directly to each other without a host.

USB host chips (e.g. controlled via SPI) exist, you would need one of them in order to talk to an existing USB HID keyboard.

Some older keyboards can still talk PS/2 protocol. No idea how difficult that would be to implement on NRF52x.