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The ESP32-C3 OLED pluggable terminal base seen from above at an angle: a black board with a tall grey eight-way push-in terminal block down each long edge, numbers 3 to 10 printed beside the left one, two black sockets in the middle for the OLED board with a white battery connector between them, and a slide switch with two mounting holes beside it at the far edge.
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This board opens in a VR headset: life-size, or big enough to stand beside, with every pin and every part named where it sits. Open this address in the browser on a headset such as Apple Vision Pro or Meta Quest.

learn.lonelybinary.com/vr/c3plug
You have this

ESP32-C3 OLED Pluggable Terminal Base

A 25 × 20.5 mm ESP32-C3 board with a 72 × 40 OLED already wired to GPIO 5 and 6, and three bases it seats on, each with a battery connector, charger and switch: 2.54 mm pins, push-in terminals or screw terminals.

Terminals
2 × 8at 3.5 mm
Base size
53.1 × 32.5mm
Height
14.9mm
Mounting holes
16mm apart
Start here · 12 The pluggable terminal baseOpen the base in 3D

Turn it over, click any terminal, and see which GPIO it is and what the ESP32-C3 OLED board already uses it for.

Product questions & answers ↓

The ESP32-C3 OLED and its three bases

One ESP32-C3 OLED board, three bases it seats on: 2.54 mm pins, push-in terminals or screw terminals. Each base carries the same battery connector, charger and power switch.

See this board 72 × 40pixel OLEDESP32-C3 OLED Development BoardChip: 160 MHz RISC-VSee this board 16GPIO and power, brought outESP32-C3 OLED Expansion Base (2.54 mm)Each side: 8 + 8 pins and sockets at 2.54 mm
You have this2 × 8at 3.5 mmESP32-C3 OLED Pluggable Terminal BaseBase size: 53.1 × 32.5 mm
See this board 16ESP32-C3 OLED Screw Terminal BaseTerminals: 2 × 8 at 3.5 mm
The whole handbook17 articles · 100 minQuick referencePDF · 522 KB3D model (GLB)GLB · 3.6 MBCAD model (STEP)ZIP · 3.4 MBDrawing (DXF)ZIP · 211 KBDrawing (PDF)PDF · 2.5 MBPinout and specsThe pin table, and the questions people ask first
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ESP32-C3 OLED Pluggable Terminal Base

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ESP32-C3 OLED Pluggable Terminal Base
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Email us or reply to your order, and quote c3plug — that identifies the product. If something is missing from the bag, your order is the record of what shipped.

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Point a phone camera at the code and this page opens there. It is the same address as the one printed on your box, so it is also what to show someone you are passing the board to.