M5Stack ATOM Matrix ESP32 Development Kit

The ATOM Matrix, at only 24 x 24mm, is the most compact development board in the M5Stack development kit series. The fits-in-your-change-pocket size computer contains a ESP32-PICO-D4 chip, which comes integrated with WiFi, Bluetooth®, and 4MB of integrated SPI flash memory. All this along with its bitty form factor, it also provides more GPIO pins, making it ideal for embedded device development. The ATOM provides an infrared LED along with the 5x5 RGB LED matrix on the panel, a built-in IMU sensor (MPU6886), and a Grove/Stemma-compatbile JST 2-PH interface. A general-purpose programmable button is located below the RGB LED matrix for extra input fun. The on-board USB Type-C is used to load code, and debug with prints. One M2 screw hole is located on the back for mounting.