HP 975 Dual-Mode Wireless Keyboard not working with Dreamcast

[LightTreason]

BlueRetro firmware version

v24.10

BlueRetro firmware specification

HW1

BlueRetro firmware variant

System specific

BlueRetro hardware type

External adapter with multiple hardwired cord

Manufacturer

RetroScaler

System used

SEGA Dreamcast

Bluetooth controller brand & name

HP 975 Dual-Mode Wireless Keyboard

What is problem? (only list ONE problem per report)

I'm trying to use this keyboard: https://h20195.www2.hp.com/v2/GetDocument.aspx?docname=4aa8-0290enw. It pairs fine to the BlueRetro dongle, but The Typing of the Dead is stuck at the first screen asking me to plug in a keyboard.

I already set the matching Output (Output 1) mode to Keyboard. The Dreamcast does see the connected controller in the system menu because it shows the virtual memory card associated with it.

I'm attaching a Wireshark trace while connecting the keyboard to my Windows device. During the trace, I paired it and the typed 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, and Enter.

What did you expect to happen?

I hoped the game would recognize the keyboard and work.

Attach files like logs or Bluetooth traces here

hp keyboard trace.zip