WDI Wheelchair HID TesterHID 3.2USB + BLE

Control Report (18 bytes): X(SInt8) + Y(SInt8) + Standard1(UInt32) + Standard2(UInt32) + Vendor1(UInt32) + Vendor2(UInt32)

Vendor1: Bit 0 = Modifier, Bit 1 = LUCI Override, Bit 2 = LUCI React, Bits 3-31 = TBD

Feedback Report (19 bytes) v3.0: Standard(UInt32) + Vendor1(UInt32) + Vendor2(UInt32) + Speed/Profile(UInt8) + Velocity(UInt8) + Odometer(UInt8) + Reserved×4(UInt8)

Vendor1: Bit 0 = LUCI Override OFF, Bit 1 = LUCI Override ON, Bit 2 = LUCI React OFF, Bit 3 = LUCI React ON, Bits 4-31 = Reserved

Request Feedback Report (1 byte): UInt8 = 0x01

Sent from App/Device to request a full Wheelchair Feedback HID report. Not edge-triggered or hold/release — value is always 1. The Central should respond with a Feedback report (0x02).

Keepalive Report (1 byte): UInt8 = 0x01. Mandatory, sent every ~233ms.

Sent from App/Device every ~233ms. Sending a control or request feedback report resets the keepalive timer. Central checks that a keepalive, control, or request feedback report is received at least every 257ms. If 3 consecutive report timeouts occur, Central treats as Release Report and Disable Drive. Central sends a Keepalive Response (16-byte host UUID) after each Keepalive received.

Keepalive Response Report (16 bytes): Host UUID sent from Central to App/Device.

Sent from Central (host) to the App/Device upon receiving each Keepalive report. The host UUID is a cryptographically unique 16-byte identifier (RFC 4122 v4). Bytes 0–1 encode the 16-bit manufacturer ID big-endian per spec 3.2 Appendix F; the remaining 14 bytes provide per-host uniqueness. The App/Device uses this to verify it is connected to the expected host.