AtomU

SKU:K117

Description

AtomU is an ultra-compact and flexible IoT voice-recognition development board powered by Espressif’s ESP32. It is equipped with two low-power Xtensa® 32-bit LX6 microprocessors running at up to 240 MHz. The board integrates peripherals such as a USB Type-A interface, IR transmitter, and a programmable RGB LED, allowing true plug-and-play use for uploading, downloading, and debugging firmware.
With its built-in Wi-Fi module and on-board digital microphone SPM1423 (PDM), AtomU enables clear audio recording, making it ideal for human–machine interaction and speech-to-text (STT) applications in various IoT scenarios.

Tutorial

UiFlow1

UiFlow1

This tutorial shows you how to control the AtomU device via the UiFlow1 graphical programming platform.

UiFlow2

UiFlow2

This tutorial shows you how to control the AtomU device via the UiFlow2 graphical programming platform.

Features

• ESP32-PICO-D4 (2.4 GHz Wi-Fi)
• USB-A programming/power interface
• Integrated programmable RGB LED and button
• Ultra-compact body
• Built-in IR transmitter
• Expandable pins and GROVE interface
• Development Platform
  • UiFlow1
  • UiFlow2
  • Arduino IDE
  • ESP-IDF
  • PlatformIO

Includes

• 1 x AtomU

Applications

• IoT controller
• Voice recording & cloud STT recognition

Specifications

Schematics

PinMap

SPM1423 – PDM

IR & SK6812 & BUTTON

HY2.0-4P

Model Size

Datasheets

• ESP32-PICO
• SPM1423

Softwares

Arduino

• AtomU STT Example

UiFlow1

• AtomU UiFlow1 Quick Start

UiFlow2

• AtomU UiFlow2 Quick Start

PlatformIO

[env:m5stack-atom]
platform = espressif32@6.7.0
board = m5stack-atom
framework = arduino
upload_speed = 1500000
monitor_speed = 115200
build_flags =
    -DCORE_DEBUG_LEVEL=5
lib_deps =
    M5Unified=https://github.com/m5stack/M5Unified

USB Driver

AtomU may not work without a driver on some systems. You can resolve this issue by manually installing the FTDI VCP driver.

1. Select the driver file that matches your operating system from the list below, download it, and extract it. You can also visit the FTDI Chip official website for additional FTDI driver versions.

2. Connect the device to your PC, open Device Manager, and install the FTDI driver (the screenshot below uses Windows 10 as an example). (Note: On some systems, you may need to install the driver twice for it to take effect. The unrecognized device is usually named M5Stack or USB Serial.)

Video

Product Comparison

To compare information on the Atom series products, you can visit the Product Selection Table, check the target products, and get the comparison results. The selection table covers key information such as core parameters and functional features, and supports comparison of multiple products simultaneously.