The ATOM Matrix is the most compact development board in the M5Stack series, measuring only 24 x 24mm. It features the powerful ESP32-PICO-D4 chip with integrated WiFi, Bluetooth, and 4MB of SPI flash memory. This tiny powerhouse provides more GPIO pins, making it ideal for embedded device development.

The board includes a 5×5 RGB LED matrix panel, an infrared LED, a built-in MPU6886 IMU sensor, and a Grove/Stemma-compatible JST 2-PH interface. A programmable button is conveniently located below the LED matrix for user input. It is powered via a USB Type-C port and includes a mounting hole for easy installation.

Note that this product is the ATOM Matrix board only; no additional cables or batteries are included.

Features

• ESP32 PICO-based chip with WiFi and Bluetooth
• Programmable button for versatile input
• 5×5 WS2812B RGB LED matrix panel
• Infrared transmission LED
• MPU6886 IMU sensor
• Extendable pins and mounting holes
• Programming platforms: Arduino, UIFlow

Technical Specifications

• Processor: ESP32 240MHz dual-core, 600 DMIPS, 520KB SRAM, dual-mode Bluetooth
• Flash Memory: 5MB
• Power: 5V @ 500mA via USB-C
• Ports: USB-C x1, Grove (I2C + I/O + UART) x1
• GPIO Pins: G19, G21, G22, G23, G25, G33
• RGB LEDs: WS2812B x 25
• Sensor: MPU6886 IMU
• Infrared LED for transmission
• Antenna: 2.4G 3D antenna
• Operating Temperature: 0C to 40C (32F to 104F)
• Dimensions: 24 x 24 x 14 mm
• Weight: 14g
• Case Material: PC Plastic

For more information, see the official M5Stack ATOM Matrix documentation.