Plug in a sensor. Watch it glow.
A mini station with an ESP32-C3, Wi-Fi and an 18×7 RGB LED matrix: the time, the weather, your crypto and whatever your I2C sensors measure, always in view.
In detail
WuaStation-Mini is much more than an LED matrix: it's a connected mini station. On a 54.5 × 20 mm board it brings together an ESP32-C3 with Wi-Fi, our panoramic 18×7 RGB LMX1p matrix, USB-C to power and program it, two buttons and a 2×3-pin I2C expansion connector with two extra GPIOs. Plug in a temperature, humidity or pressure sensor (BME280, SHT4x, SHT3x or AHT2x), the firmware detects it automatically and shows its readings on the matrix alongside the NTP-synced time, your city's weather (Open-Meteo), up to four crypto tickers (Binance), a visual alarm and your own message. On first boot it opens its own Wi-Fi network so you can pick yours from the browser; after that, every setting can be changed from your local network. And because the firmware is open (PlatformIO on Arduino-ESP32), adding a new screen, data source or sensor is just a matter of implementing one interface.
Use cases
Repositories
Open design: PCB, library and firmware on GitHub.
Gallery
Pinout
What each pin on the board maps to.
J1 expansion connector: a 2×3 2.54 mm female header on the back, next to the buttons. The board has no I2C pull-ups: use a sensor breakout that includes them (almost all do).
Top row
- SCL I2C clock (IO6)
- 3V3 Sensor power (3.3 V)
- XT1 Extra GPIO (IO8)
Bottom row
- SDA I2C data (IO3)
- GND GND (ground)
- XT2 Extra GPIO (IO2)
- Makers who want a temperature, humidity or pressure station without designing the electronics from scratch.
- Anyone looking for a small desk gadget: clock, weather and markets always in view.
- IoT and home-automation projects that need to show data on a readable, good-looking display.
- Developers who want an open ESP32-C3 base to add their own screens and data sources.
Data everywhere, none of it in view
- A loose sensor on a breadboard measures, but shows you nothing without a PC next to it.
- Putting together a microcontroller, display, Wi-Fi and power is a project in itself: wires, libraries and hours.
- Commercial stations are closed: you can't swap the sensor or change what they show.
The WuaStation-Mini solution
- Everything on a 54.5 × 20 mm board: an ESP32-C3 with Wi-Fi, an 18×7 RGB LMX1p matrix, USB-C and buttons.
- An I2C expansion connector: plug in a BME280, SHT4x, SHT3x or AHT2x and the firmware detects it on its own.
- Set up from your browser: its own Wi-Fi portal and a settings page on your local network, no app.
- Rotates through time, date, weather, sensor, crypto ticker and your message, with open firmware to add whatever you want.
What makes it special
Plug-and-play I2C sensors
Plug a BME280, SHT4x, SHT3x or AHT2x into the expansion connector and the firmware detects it on its own, even hot-plugged: temperature, humidity and pressure on the matrix right away.
Wi-Fi, no app
On first boot it opens its own network so you can pick yours. After that, timezone, city, tickers, alarm, message and brightness are set from your browser on your local network.
Time, weather and markets
An NTP clock with daylight saving, Open-Meteo weather and up to 4 Binance tickers, with a compact font designed so “12:34” fits in 18 pixels.
Open, extensible firmware
PlatformIO on ESP32-C3. A new screen, internet data source or sensor is added by implementing one interface, without touching the rest.
Want it for your project?
Tell us what you want to build and we'll help you choose and quote.
