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ATOM Lite ESP32 Development Kit

by M5Stack

A smart, ESP32-PICO based development kit with built in WiFi and Bluetooth, an indicator LED and a button - brilliant for Internet of Things projects!

These little guys have become firm favourites for our IoT projects, as they're great value, easy to mount places and come with their own built in housing, so you don't need to make an enclosure to protect them. There's a handy pinout diagram on the back of the case, and they work really nicely with Home Assistant and ESPHome if you want to quickly and easily set up a network of sensors.

Because they're so tiny (24mm x 24mm), they'd be also be ideal for incorporating into embeddable or wearable projects where space is at a premium. If you'd like moar lights we also sell an ATOM with an inbuilt LED matrix, and we also stock a compatible plug and play battery!

For more information and for help getting started, click here. M5Stack 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 chip
  • Onboard wifi and Bluetooth
  • 4MB of integrated SPI flash memory
  • Programmable button
  • Built-in Infra-red LED
  • Six GPIO connectors for attaching to external sensors
  • PH2.0 interface
  • On-board USB-C interface for programming
  • Program Platform: Arduino¬†/¬†UIFlow


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


Resources 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 1
IR Infrared transmission
Button Custom button x 1
Antenna 2.4G 3D Antenna
Operating Temperature 32¬įF to 104¬įF ( 0¬įC to 40¬įC )
Size 24 x 24 x 10 mm
Weight 12g
Case Material Plastic ( PC )