---
phase: 04-hid-data-pipeline
plan: 02
subsystem: hid
tags: [device-provider, reader-thread, status-command, verification, hardware-validation]

requires:
  - phase: 04-hid-data-pipeline
    provides: "HidDevice reader thread with StartReading/StopReading/GetProxDistance/GetConnectionState/GetCalibration"
provides:
  - "DeviceProvider wired to HID reader thread lifecycle (Init->StartReading, Cleanup->StopReading)"
  - "Extended status command returning hid state, prox_raw, cal, thresh, hyst, trim"
  - "Phase 04 verification script (14 structural checks)"
affects: [05-proximity-algorithm]

tech-stack:
  added: []
  patterns: [reader-thread-lifecycle-integration, extended-status-diagnostics]

key-files:
  created:
    - scripts/verify_hid_pipeline.ps1
  modified:
    - src/driver/device_provider.cpp

key-decisions:
  - "No changes to device_provider.h needed -- CalibrationData used locally in HandlePipeCommand only"
  - "StopReading called before reset to ensure reader thread joins before HidDevice destruction"

patterns-established:
  - "Status command pattern: key=value pairs for all HID state in single response"
  - "Verification script pattern: 14 structural checks covering module, API, integration, and implementation"

requirements-completed: [HID-02, HID-03, HID-04, HID-05]

duration: 3min
completed: 2026-03-22
---

# Phase 04 Plan 02: DeviceProvider HID Integration Summary

**DeviceProvider wired to HID reader thread lifecycle with extended status diagnostics (prox_raw, calibration values, connection state) and 14-check verification script**

## Performance

- **Duration:** 3 min
- **Started:** 2026-03-22T13:50:04Z
- **Completed:** 2026-03-22T13:52:36Z
- **Tasks:** 3 of 3
- **Files modified:** 2

## Accomplishments
- Wired DeviceProvider::Init to StartReading(0x35BD, 0x0101, 500) replacing direct Open call
- Wired DeviceProvider::Cleanup to StopReading before HidDevice destruction for clean thread shutdown
- Extended status command to return connection state (open/closed/reconnecting), raw proximity distance, and all 4 calibration values
- Created verify_hid_pipeline.ps1 with 14 structural checks -- all passing

## Task Commits

Each task was committed atomically:

1. **Task 1: Wire DeviceProvider to HID reader thread and extend status command** - `a8d88ce` (feat)
2. **Task 2: Create verify_hid_pipeline.ps1 verification script** - `08a1904` (feat)
3. **Task 3: Hardware validation** - PASSED (checkpoint:human-verify approved)

## Files Created/Modified
- `src/driver/device_provider.cpp` - Init calls StartReading, Cleanup calls StopReading, status returns full HID state
- `scripts/verify_hid_pipeline.ps1` - 14-check verification script for Phase 04 structural requirements

## Decisions Made
- No changes to device_provider.h needed -- CalibrationData type used locally in HandlePipeCommand via include, not stored as member
- StopReading called before m_pHidDevice.reset() to ensure reader thread is joined before HidDevice object destruction

## Deviations from Plan

None - plan executed exactly as written.

## Issues Encountered

None.

## User Setup Required

None - no external service configuration required.

## Hardware Validation Results

User confirmed all checks on real Beyond 2 hardware:
- Status shows hid=open with non-zero prox_raw and valid calibration values
- prox_raw changes with hand proximity (sensor responsive)
- vrserver.txt log confirmed: "HID: Starting reader thread (rate=500ms)", "HID: Device opened/reconnected", "HID: Calibration: cal=1800 thresh=741 hyst=100 trim=0", "HID: Report rate set to 500ms"
- Disconnect/reconnect test passed: USB unplug/replug triggers reconnect cycle with log entries

## Next Phase Readiness
- Phase 04 complete -- all HID data pipeline requirements validated on hardware
- Ready for Phase 05 proximity algorithm

## Self-Check: PASSED

All files and commits verified present.

---
*Phase: 04-hid-data-pipeline*
*Completed: 2026-03-22*