{
  "schema_version": "1.0",
  "release": "v0.3-closed-side-cover-first-fit",
  "release_date": "2026-08-03",
  "status": "physical_validation_pending",
  "model": "ParaMat OpenSpool ESP32-S3 + PN532 carrier and snap cover",
  "cad_engine": "CadQuery 2.7.0",
  "dimensions_mm": {
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      "length": 145.7,
      "width": 78.0,
      "height": 10.8
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    "cover": {
      "length": 149.6,
      "width": 81.9,
      "height": 27.6
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  "target_hardware": {
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      70.0
    ],
    "adapter_hole_pitch_mm": [
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      32.0
    ],
    "adapter_hole_pitch_source": "reference board; actual AITRIP board measurement pending",
    "adapter_pcb_hole_diameter_mm": 3.0,
    "controller_envelope_mm": [
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      28.0
    ],
    "pn532_envelope_mm": [
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      40.4,
      4.0
    ]
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  "cover": {
    "attachment": "four compliant side latches with segmented edge groove",
    "xy_clearance_per_side_mm": 0.35,
    "wall_mm": 1.6,
    "roof_mm": 1.6,
    "long_side_service_openings": false,
    "usb_access": {
      "apertures": 2,
      "nominal_width_height_mm": [
        12.0,
        9.0
      ],
      "centers_y_mm": [
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        7.0
      ],
      "center_z_mm": 20.5,
      "center_rib_mm": 2.0,
      "origin": "first_fit_unverified_controller_origin"
    },
    "button_tool_hole_mm": 4.2,
    "rgb_membrane_mm": 0.45,
    "control_origin": "first_fit_unverified_adapter_origin"
  },
  "fastener": {
    "thread": "M2.5",
    "length_mm": 6.0,
    "attachment": "blind self-tapping pilot slot in printed plastic",
    "inserts_or_nuts_required": false
  },
  "license": {
    "hardware": "CERN-OHL-S-2.0",
    "notice": "LICENSE-Hardware.txt",
    "source_location": "https://github.com/sunnyday-technologies/paramat/tree/main/downloads/openspool-s3-pn532"
  },
  "validation": {
    "geometry_tests_passed": 8,
    "nominal_xy_within_a1_mini_bed": true,
    "actual_adapter_hole_pitch_verified": false,
    "physical_fit": false,
    "connector_access": false,
    "usb_aperture_alignment": false,
    "usb_bridge_quality": false,
    "closed_side_wire_clearance": false,
    "cover_snap_fit": false,
    "button_access": false,
    "rgb_membrane_visibility": false,
    "rf_read_write_at_printer": false
  },
  "sources": [
    "https://www.hestore.eu/en/prod_10048181.html",
    "https://github.com/profharris/YD-ESP32-S3_ESP32-S3-WROOM-1_Dev",
    "https://www.elechouse.com/elechouse/images/product/PN532_module_V3/PN532_%20Manual_V3.pdf",
    "https://github.com/spuder/OpenSpool",
    "https://spdx.org/licenses/CERN-OHL-S-2.0.html"
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