To analyze the request/response from the keyboard you need to install:
For writing custom software or testing, you need to install (Recommended):
You must use the correct VID and PID to communicate with the device!
Default value:
| VID | PID |
|---|---|
| 0x1A2C | 0x9CF4 |
If the default values are not suitable, find the VID and PID manually.
-
Windows: use device manager (information -> equipment ID)
-
Linux: use command in terminal
bash dmesg | grep -i usb
Two protocols are used to communicate with the keyboard:
| Protocol | It's used |
|---|---|
| USB | Low-level USB packets, e.g. used to process keystrokes |
| USBHID | A high protocol that supports additional commands for configuration |
| Parameter | Value(s) | Mutable | Description |
|---|---|---|---|
| bmRequestType | 0x21 | No | Determines the type of USB request |
| bmRequest | 0x09 | No | The exact request or command being issued to the USB device |
| wValue | ? | Yes | Provides additional information or parameters for the request specified |
| wIndex | ? | Yes | Specifies the index or identifier associated with the request |
| wLength | ? | Yes | How many bytes of data the host expects to send to or receive from the USB device as part of a control transfer |
| data | ? | Yes | The payload of information that is sent to or received from the USB device after the control transfer setup packet |
[?] - can have many different meanings