stolaris.dev

I make small ESP32 devices and the software that talks to them. Printer monitors, clocks, a label printer that runs in the browser, a lamp you turn on by touching it.

Everything here started because I wanted the thing on my own desk. Some of it flashes straight from the browser, some of it you build by hand. All of it is open source.

Start here

Five BambuHelper builds side by side on a desk, each showing the same print in progress

BambuHelper

466
ESP32-S3 / MQTT over TLS / colour TFT

Desk monitor for Bambu Lab printers. Live dashboard with arc gauges, AMS trays, drying state and print progress. LAN or cloud, a dozen supported boards.

bambuhelper.stolaris.dev
SmallOLED in a red printed case showing the animated clock face, warm light spilling underneath

SmallOLED

257
ESP32-C3 / 128x64 OLED / companion app

A little OLED on the desk. Live CPU, GPU, RAM and network from a Windows or Linux companion, and an animated clock the rest of the time. Plenty of people run it only as the clock. Four panel sizes, a printed case for each.

smalloled.stolaris.dev

Everything else

A 128x64 RGB LED matrix on a shelf showing the time with Tetris blocks stacking along the bottom

AnimatedPixelClock

83
ESP32-S3 / HUB75 matrix

Retro arcade clock on a 128x64 RGB LED matrix. Thirteen styles including Pac-Man, Tetris and Space Invaders, all recoloured from a built-in web interface.

pixelclock.stolaris.dev
StatNode in a black printed case showing CPU, RAM and network sparklines on a colour panel

StatNode

ESP32 / UDP / web portal

The colour successor to SmallOLED. Twelve selectable faces built from four layouts and four surfaces, fed over UDP by a PC companion.

statnode.stolaris.dev
The ESP32 RF Bench page with a board under test and a reference board connected, each showing chip, Wi-Fi MAC and hardware details before a run

ESP32 RF Bench

ESP32-C3 / ESP32-S3 / Web Serial

Screens ESP32-C3 and ESP32-S3 boards for a weak Wi-Fi antenna. Flash the test firmware from the browser, run the measurements, and get a PASS / WARN / FAIL verdict with its reasoning. Nothing leaves your machine.

esp32rf.stolaris.dev
The LabelDesk editor with a 30 by 12 mm label reading ESP32-S3 ZERO on the canvas

LabelDesk

Web Bluetooth / TypeScript

Label designer for NIIMBOT thermal printers that runs entirely in the browser. Design on a canvas, preview the one-bit output, print. No install, no backend, no accounts.

labeldesk.stolaris.dev
The doorbell opened up, showing the speaker, the ESP board and the DFPlayer module inside a printed case

DFPlayerDoorBell

ESPHome / DFPlayer Mini

A doorbell that plays whatever MP3 is on the card, wired into Home Assistant through ESPHome. Unglamorous, and still ringing at my door every day.

A mushroom-shaped printed lamp glowing warm on a workbench

LedLamp

Arduino Pro Mini / TTP223 touch pad

An LED lamp switched by a capacitive pad instead of a button. An Arduino Pro Mini and a TTP223, and nothing on the board doing more than it has to.