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ATOM Matrix ESP32 Development Kit

by M5Stack

Tiny ESP32 powered dev kit with a built in 5x5 RGB LED matrix, which also functions as a programmable button.  At only 24x24mm, it's great for fitting into projects where space is at a premium!

These little fellas would be super for incorporating into all sorts of projects which would benefit from a smart, wifi connected button that's capable of showing visual feedback. You could set up an IoT thermostat system, use one as as a synth controller, or as a calendar connected busy light/doorbell for your home office.

It's programmable via Arduino IDE, but also by the graphical drag and drop programming interface UIFlow, ideal for folks new to ESP32 microcontrollers. If you don't need the LEDs, we sell the basic ATOM here , and we also stock a compatible plug and play battery!

For more information and for help getting started, click hereM5Stack boards come with a simple test sketch installed but no firmware - if you want to program it with UIFlow you will first need to flash it to your board with the M5Burner tool.

Product Features

  • ESP32-PICO-D4 chip
  • Onboard wifi and Bluetooth
  • 4MB of integrated SPI flash memory
  • Programmable button
  • 5 * 5 RGB LED matrix panel
  • Built-in Infra-red LED
  • Built-in MPU6886 Inertial Sensor
  • Six GPIO connectors for attaching to external sensors
  • PH2.0 interface
  • On-board USB-C interface for programming
  • Program Platform: Arduino / UIFlow

NOTE: The brightness of RGB LED is limited to 20. Setting it higher risks damaging the LED and acrylic screen.

One M2 screw hole is provided on the back for mounting the board.


    • Internet of things terminal controller
    • IoT node
    • Wearable peripherals


    Resource Parameter
    ESP32 240MHz dual core, 600 DMIPS, 520KB SRAM, Wi-Fi, dual mode Bluetooth
    Flash 4MB
    Power Input 5V @ 500mA
    Port TypeC x 1, GROVE(I2C+I/0+UART) x 1
    PIN Port G19, G21,G22,G23,G25, G33
    RGB LED WS2812B x 25
    MEMS MPU6886
    IR Infrared transmission
    Button Custom button x 1
    Antenna 2.4G 3D Antenna
    Operating Temperature 32°F to 104°F ( 0°C to 40°C )
    Size 24 x 24 x 14 mm
    Weight 14g
    Case Material Plastic ( PC )