"Blinky" - the ESP32 Bezel Case with OLED Front

A minimalist, rounded-edge enclosure designed for the Elegoo ESP-WROOM-32 development board and a 1.3" 128×64 OLED display module. Built for clean looks, secure mounting, and easy assembly. Originally built for “Blinky” – my Eyes program, this case provides a clean, durable home for OLED-based ESP32 projects while keeping everything flush, secure, and easy to assemble.

Parts Used

• Elegoo ESP-WROOM-32 Development Board
  👉 Amazon Link
• 1.3" 128×64 OLED Display Module
  👉 Amazon Link

Features

• Front Display Bezel: OLED snaps neatly into place with no glue required.
• Recess for Header Pins: Bezel top includes a cutout so soldered headers don’t interfere.
• Tray System: Internal trays align and compress the ESP32 board securely.
• Outer Shell + Rear Plate: Smooth curved enclosure with flush fitment.
• Flush Hardware: Screw heads sit even with the surface for a professional finish.
• Access Holes: Cutouts on the bottom of the case provide access to the boot and reset buttons of the ESP32.
• Compact Size: 43.15 mm (W) × 41 mm (H) × 63.6 mm (D).

Printing Recommendations

• Layer Height: 0.12 mm (for smooth bezel edges and rounded corners).
• Material: PLA (easy), PETG (durable), or ABS (heat-resistant).
• Infill: Solid infill — parts are thin enough that sparse infill is not required.
• Supports: Only minor supports for tray overhangs — they pop off cleanly using the recommended profile.
• Walls: No special wall settings needed since parts are solid.

Assembly Instructions

1. Print the Case
   • Print at 0.12 mm layer height.
   • Upright orientation, with minor supports for tray overhangs.
2. Prepare & Test the OLED
   • Connect OLED to ESP32 (I²C: VCC → 3.3V, GND → GND, SCL → GPIO22, SDA → GPIO21 by default).
   • Upload a test sketch to verify display function before assembly.
3. Install the OLED in the Bezel
   • Snap the OLED into the front bezel from the inside.
   • The top recess ensures clearance for soldered header pins so the display sits flush.
4. Install Trays & Slide in ESP32
   • Place the board tray and top trays into the rear of the bezel cutout.
   • Slide the ESP32 in from the rear — pins up, USB port facing rearward.
   • Ensure it seats cleanly in the tray rails.
5. Slide on Outer Shell
   • Slide the outer shell over the bezel + board assembly from the rear.
   • ⚠️ Important: Ensure the access holes on the bottom of the case line up with the ESP32’s boot and reset buttons — they must face the rear of the case.
   • Push until edges mate flush with the bezel.
6. Attach Rear Plate
   • Position the rear plate.
   • Secure with 2×6 mm self-tapping plastic screws.
   • Snug screws evenly — just tight enough to hold firmly.
7. Final Verification
   • Confirm the OLED is flush and secure.
   • ESP32 should be firmly seated.
   • Power via rear USB and verify the display initializes.

Suggested Uses

• IoT dashboards & sensor displays
• Wi-Fi/BLE project enclosures
• Desktop or demo units