project build log

4 square

A modular desk display where every screen is yours to configure.

embedded
open source
3D printed
ESP32-S3

Type desk gadget

Date April 2026

Status complete

Source oled2x2x ↗

finished build — 4× SSD1306 OLEDs in custom 3D-printed enclosure

overview

what is this?

Four 128×64 OLED screens, each independently programmable. Runs on an Adafruit Feather ESP32-S3 with WiFi, NTP time sync, battery gauge, and a temperature sensor — all housed in a custom 3D-printed enclosure.

Every screen is a “widget” slot. Swap them out in config, no code changes needed. If it’s a number, a word, or an icon — it fits on a screen.

motivation

people want small, intentional desk objects

Succulents, Lego sets, mechanical keyboards — people curate their personal spaces carefully. There’s no good answer for a small, useful, customizable display object that’s also genuinely functional. This fills that niche: it looks cool, tells you things you actually care about, and reflects who you are.

software

fully customizable 2×2 layout

Each of the four screens is independently assigned a widget. Swap them in config — no code changes needed.

Every screen is independently programmable. If it’s a number, a word, or an icon — it fits on a screen.

enclosure

5-part 3D-printed housing

Designed in Fusion 360. The enclosure splits into a display faceplate, two display mounts, a back panel, and a snap-fit lid — everything replaceable and remixable.

01 — 5-part enclosure · display faceplate · display mount (×2) · back panel · lid

hardware

components

build gallery

prototype stage

prototype wiring — protoboard mux breakout with 4× OLEDs on jumper wires

02 — prototype stage · protoboard mux breakout · 4× OLEDs on jumper wires · testing before enclosure

build your own — it’s fully open source.

Everything is open source. Fork it, swap out screens, change the layout, add new data sources, and make it yours.

github.com/partypancake8/oled2x2x →