Atom-Echo

SKU:C008-C

Description

Atom-Echo is a programmable smart speaker based on the ATOM design, with a very compact size of only 24 x 24 x 17mm. It can connect to mobile phones, tablets, etc., via the ESP32's built-in wireless capabilities to play music, or stream specified media via WIFI. To facilitate the use of voice functions, we have integrated STT (Speech-to-Text) services into Atom-Echo. You can enable this feature by flashing specific firmware, allowing you to perform various operations through voice commands. Additionally, you can write your own code to connect to cloud platforms like AWS and Google, using the built-in microphone and speaker for voice interactions, giving Atom-Echo some AI capabilities to achieve voice control, smart conversations, IoT functions, and more. The speaker has an embedded RGB LED (SK6812) that visually displays the connection status. Besides being a smart speaker, it retains the control capabilities of the ATOM series, allowing you to connect external devices via the GROVE interface. There is an M2 screw hole on the back for easy mounting.

Tutorials & Quick Start

Home Assistant

This tutorial will show you how to connect ATOM Echo to Home Assistant

Arduino IDE

This tutorial will show you how to program and control the Atom Echo device using Arduino IDE

UiFlow Echo STT

This tutorial will show you how other M5 devices can obtain Atom Echo STT recognition results via UiFlow

Note

Pin Usage Precautions

G19/G22/G23/G33 are predefined. Do not multiplex these pins, as it may damage the ATOM ECHO.

Playback Precautions

To prevent damage to the ATOM Echo, avoid the following operations during use.
1. Using the I2S channel to output DC signals
2. Playing white noise for extended periods
3. Do not play full-amplitude square wave audio.

Features

Compact and lightweight
Supports STT services
Based on ESP32, supports A2DP, BLE 4.0
WIFI protocol IEEE 802.11b/g/n
Built-in microphone and speaker
RGB LED status display
GROVE expansion interface
Recording and sound playback
Independent programmable button
Programming platforms: Arduino, ESP-IDF/ADF

Includes

1 x Atom-Echo

Applications

Wireless speaker
Voice control
Internet of Things

Specifications

Specification	Parameters
SoC	ESP32-PICO-D4, 240MHz, Dual Core, Wi-Fi
Flash	4MB
Interface	1 x IR-TX, 1 x Button, 1 x Reset Button
PinOut	G21/G25/5V/GND, 3V3/G22/G19/G23/G33
RGB LED	SK6812
SPEAKER	0.8W/NS4168 I2S
MIC	SPM1423 PDM
Housing Material	Plastic (PC)
Product Weight	5g
Gross Weight	10g
Product Size	24 x 24 x 17mm
Package Size	85 x 65 x 17mm

Schematics

PinMap

SPK & MIC

Atom-Echo	G22	G19	G33	G23
NS4168	AMP DATA	AMP BCLK	AMP LRCK
SPM1423			MIC CLK	MIC DATA

HMI

Atom-Echo	G27	G39
RGB LED	Data
Button		Input

HY2.0‑4P

HY2.0‑4P	Black	Red	Yellow	White
PORT.CUSTOM	GND	5V	G26	G32

Model Size

Datasheets

Softwares

Arduino

ESP-IDF

Factory BT Speaker Firmware

USB Drivers

Driver Installation

Baud Rate Limit

When performing the device program download operation, it is recommended to select the following serial port baud rate options. If other speeds are used, it may result in the program being unable to be downloaded properly.
1500000 bps / 750000 bps / 500000 bps / 250000 bps / 115200 bps

Connect the device to your PC and open Device Manager to install the FTDI driver. For example, in a Windows 10 environment, download the driver file that matches your operating system, extract it, and install it via Device Manager. (Note: In some system environments, the driver may need to be installed twice to take effect. The unrecognized device name is usually M5Stack or USB Serial. Windows recommends using the driver file directly in Device Manager for installation (custom update), as the executable installation method may not work properly). Click here to download the FTDI driver

MacOS User Precautions

For MacOS users, before installation, please check System Preferences -> Security & Privacy -> General -> Allow apps downloaded from -> App Store and identified developers.

Easyloader

Wireless Speaker

Uses the A2DP protocol to transmit audio data (currently does not support phone calls). When powered on, the LED displays red. When connected to a wireless device, the LED turns green, allowing audio to be output through the ATOM ECHO. After disconnection, the LED turns back to red. This firmware is compiled on the ESP-IDF platform. Regular users can directly download EasyLoader for flashing. Advanced users who wish to develop other features can set up the ESP-IDF environment according to Espressif's official documentation. The factory firmware source code and BIN files are available at the following link, with the BIN file flashing address at 0x0000.

Easyloader	Download Link	Notes
Atom-Echo RecordPlay Example Easyloader	download	/
Atom-Echo BT Speaker Firmware Easyloader	download	/

Video

Tutorial on Setting Up M5Stack Atom Echo as a Home Voice Assistant