ESP32-S3 No-Connect Markers
Add no-connect markers to the unused pins of the ESP32-S3 module.
Thought for 12 sec
I’ll identify the ESP32-S3 pins with no electrical connections, add no-connect markers only to those pins, then verify the result.
Worked for 1 min 45 sec
Added no-connect markers to all 33 unused GPIO/UART pins on U1. Verified no connected, power, ground, EN, boot, or strapping pins were marked; existing wiring and placement remain unchanged.
Fix essentials and review
Connect ground pins
Add EN boot circuitry
Run ERC review
Arrange schematic
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Enclosure Build
Datum and authored geometry
- Target: ESP32-S3 Prototype, rectangular PCB 160 × 100 mm, centered at layout (0, 0).
- Stackup: 4-layer, measured total thickness 1.30 mm; board top is enclosure
z=0, PCB extends toz=-1.30 mm. - Assets:
esp32-s3-enclosure-base.scadandesp32-s3-enclosure-lid.scad, authored in one board-centered frame. - External envelope: 170 × 110 mm; base bottom
z=-4.90 mm, seamz=9.00 mm, lid topz=10.60 mm. - Gray reserved material color: #9a9a9a.
Fit-critical parameters
- FDM wall/floor/lid: 1.60 mm nominal.
- PCB cavity: 161 × 101 mm (0.50 mm edge clearance per side).
- Bottom clearance: 2.0 mm below the 1.30 mm PCB; top cavity to seam: 9.0 mm above board top.
- Registration lip: 1.2 mm deep, 0.25 mm fit clearance.
- Four lid bosses: 7.0 mm OD, 2.4 mm pilot; lid holes 3.2 mm, recessed 6.2 × 1.0 mm heads.
- Board retention: perimeter underside support ledges; the closed lid captures the PCB without requiring board holes.
- ESP32 antenna datum: U1 at (-7.459, -17.013) mm; antenna/keepout centered approximately (-7.459, -2.315) mm. Lid has a 28 × 22 mm relief pocket leaving a 0.8 mm non-metallic skin and no boss/rib/fastener in that area.
- No connector, button, display, or mounting-hole components were present in the inspected PCB layout, so no panel openings were authored.
FDM settings (suggested starting values)
- Material: gray PETG or PLA; 0.4 mm nozzle; 0.20 mm layers.
- 4 perimeters, 5 top/bottom layers, 20–25% gyroid infill.
- Print base floor-down and lid outer-face-down; supports normally off. Check screw-head recess bridging on the chosen printer.
- Dimensional calibration: print a boss/lip coupon first if a tight cosmetic seam is required.
Hardware BOM
Table
| Item | Qty | Notes |
|---|---|---|
| 3.0 mm self-tapping plastic screw, 8 mm long, pan/low-profile head | 4 | For 2.4 mm pilot bosses; verify chosen screw root diameter |
| Optional adhesive rubber foot, 8–10 mm | 4 | Keep screw recesses accessible |
Assembly
- Deburr the cavity, lip, pilot holes, and screw recesses.
- Seat the PCB top-side up on the perimeter support ledges; confirm all edges retain 0.5 mm nominal clearance.
- Confirm the ESP32 antenna region has no added metal, wiring, or hardware above/in front of it.
- Engage the lid registration lip without forcing it.
- Install four self-tapping screws gradually in a cross pattern; do not overtighten.
- Service by removing the four lid screws; the lid is a separate model/part.
Fit QA and assumptions
- Verify board outline and thickness against the fabricated PCB before printing the final pair.
- Verify tallest top-side component height; 8.5 mm top headroom is conservative because component height metadata was unavailable.
- All inspected components are top-side; 2.0 mm bottom clearance is reserved despite no bottom components being reported.
- No open vents were added: assumed low-power prototype duty. Validate enclosure temperature during sustained Wi-Fi transmit/high CPU load.
- No connector/button openings exist because none were present in the current layout. Future connectors require mating-plug/actuator-sized cutouts, not body-only apertures.
- Check antenna performance with the lid fitted; the RF pocket is plastic-only but has not been RF-tested.
Datum and authored geometry
Fit-critical parameters
FDM settings (suggested starting values)
Hardware BOM
Assembly
Fit QA and assumptions
