SPECIFICATIONS

Brand Name: M5Stack

Choice: yes

High-concerned chemical: none

Model: ATOM Echo

Option1: ATOM Echo

Option2: Atomic Echo Base

Option3: ASR Unit

Option4: ATOM EchoS3R

Origin: Mainland China

Type: ESP Series

Please note order optional

Option1 ATOM Echo

Option2 Atomic Echo Base

Option3 ASR Unit

Option4 ATOM EchoS3R

M5Stack ATOM Echo Programmable Smart Speaker ESP32 Development Board

 

 Product Features 

• Light and small

• Support STT services

• Based on ESP32, Support A2DP

• 2.4G Wi-Fi IEEE 802.11b/g/n

• Built-in microphone and speaker

• RGB LED status display indication

• GROVE extension interface

• Record and playback

• Programmable key

• Programming platform: Arduino, ESP-IDF/ADF

Applications

• BT Speaker

• Voice control

• IoT

 Package Includes 

1x ATOM ECHO

 Specification 

Resources Parameter

SoC: ESP32-PICO-D4,240MHz,Dual Core,Wi-Fi

Flash: 4MB

Interface: 1x IR-TX,1x Function Button,1x Reset Button

PinOut: G21/G25/5V/GND, 3V3/G22/G19/G23/G33

RGB LED: SK6812

Speaker: 0.8W/NS4168 I2S

Microphone: SPM1423 PDM

Net weight: 5g

Gross weight: 10g

Product Size: 24*24*17mm

Package Size: 85*65*17mm

Case Material: Plastic (PC)

 

 Product details 

 

 

Schematic

 

 Real Photos

 Kindly Remind

1, The Factory Test firmware is BT speaker, which uses A2DP protocol to transmit audio data(call reception is not supported). After power on, the red LED will be displayed. When the connection with BT device is established, the LED will turn green. At this time, the sound can be output through atom echo. The LED turns red when disconnected. The firmware is compiled on the esp-idf platform. If senior users need to develop other functions by themselves, they can build the environment according to the official documents of Espressif. See the following links for the source code of factory firmware and bin file, where the BIN file burning address is 0x0000.

2, Echo already supports HomeAssistant! The latest shipped devices with the sticker ESPHome FW Pre-installed for HomeAssistant have pre-burned ESPHome firmware, users can refer to the following link .Detailed tutorial reference Tutorials for setting up the M5Stack Atom Echo as a voice assistant for Home Assistant.

For those who are not using Home Assistant, you can flash the device with EasyLoader firmware, to resume the device to Factory Test status.

3, G19 / G22 / G23 / G33 has been defined, please do not reuse the above pins, otherwise ATOM ECHO will be damaged.

Note: please avoid such conditions with M5Stack Atom Echo.

DC output from I2S channel

Playing white noise for a long time

Playing full square-wave audio

 EasyLoader

Tutorials for setting up the M5Stack Atom Echo as a voice assistant for Home Assistant

 PinMap

M5Stack Atomic Echo Base

 

 Product Features 

• Compatible with the M5 Atom series

• Voice recognition

• Mono audio codec

• MEMS microphone

• Class-D amplifier

• Speaker

• Development platform

• UIFlow 1.0

• UIFlow 2.0

• Arduino IDE

Applications

• AI voice recognition interactive systems

• Smart home control

 Package Includes 

1x Atomic Echo Base

 Specification 

Specification Parameter

Audio Codec: ES8311: 24-bit resolution, I2S protocol

MEMS Microphone: MSM381A3729H9BPC, SNR ≥ 65 dB

Power Amplifier: NS4150B: Class-D power amplifier

Speaker: 2014-type cavity speaker: 1W@8Ω

Standby Current: DC3.3V/3.36mA

Operating Current: DC3.3V/14.84mA

Operating Temperature: 0-40°C

Product Size: 24.0 * 24.0 * 14.14mm; Packaging Size: 85.0 * 65.5 * 15.0mm

Packaging Weight: 12.5g; Product Weight: 6.3g

Please note:

MIC Sampling Rate

The Atomic Echo Base microphone supports a sampling rate range of 16KHz-64KHz.

 Product Comparison 

 Product details 

 

 

Schematics

 

Module Size

 

M5Stack Unit ASR CI-03T AI Intelligent Offline Voice Module

 

 Product Features 

• CI-03T AI intelligent offline voice module

• Noise reduction processing

• 42 pre-installed commands

• Supports up to 300 command words

• UART serial communication

• Supports custom wake-up word

• Microphone and speaker

• Development platforms:

• UIFlow 1.0

• UIFlow 2.0

• Arduino IDE

Applications

• AI Assistant

• Smart Home

• Security Monitoring

• Automotive Systems

• Robotics and Smart Hardware

• Healthcare

 Package Includes 

1 x Unit ASR

1 x HY2.0-4P Grove cable (20cm)

 Specification 

Specification Parameter

AI Module: CI-03T AI Intelligent Offline Voice Module

Command Words: Supports up to 300 command words, Factory default 42 built-in commands

Wake-up Method: UART serial communication or voice keyword wake-up

Microphone: Analog microphone

Speaker: 8Ω@0.8W speaker (used for output device wake-up feedback)

Communication: UART serial communication, default baud rate: 115200@8N1

Noise Reduction: AEC (Acoustic Echo Cancellation)

Power Consumption: Standby Current: DC5V / 47.73mA; Operating Current: DC5V / 250.12mA

Operating Temperature: 0-40°C

Product Size: 48.0 x 24.0 x 16.0mm; Product Weight: 10.5g

Packaging Size: 136.0 × 92.0 × 13.0mm; Packaging Weight: 15.8g

 Product details 

 

 

Schematics

 

Module Size

 PinMap

HY2.0-4P	Black	Red	Yellow	White
Port.C	GND	5V	TX	RX

 Product Description 

 

Unit ASR is an AI offline voice recognition unit, built with the CI-03T AI intelligent offline voice module. The unit offers powerful capabilities such as speech recognition, voiceprint recognition, voice enhancement, and voice detection. It supports AEC (Acoustic Echo Cancellation), effectively removing echoes and noise interference, thereby enhancing voice recognition accuracy. It also supports mid-conversation voice interruption, allowing flexible interruption during voice recognition and quick response to new commands. The product comes pre-configured with 42 English wake-up words and feedback command words. It uses UART serial communication for data transmission and supports awakening the device via UART or voice keywords. The unit also supports user-customizable modification of multi-language wake-up recognition words by regenerating the firmware and can recognize up to 300 command words. Equipped with a microphone for clear audio capture and a built-in speaker for high-quality audio feedback, this product is widely used in AI assistants, smart homes, security monitoring, automotive systems, robotics, smart hardware, and healthcare. It is an ideal choice for implementing intelligent voice interaction.

 

 

M5Stack Atom EchoS3R Programmable IoT Voice Interaction controller

 Product Features 

• Integrated ESP32-S3-PICO-1-N8R8 main controller

• 8MB Flash and 8MB PSRAM

• ES8311 mono audio codec

• MEMS microphone

• Class D amplifier

• Integrated infrared transmitter

• Expandable pins and interfaces

• Development Platform

• Arduino

• UiFlow2

• ESP-IDF

• PlatformIO

Applications

• BT Speaker

• Voice control

• IoT

 Package Includes 

1x ATOM EchoS3R

 Specification 

Specifications

Specification Parameter

SoC: ESP32-S3-PICO-1-N8R8 @ Dual-core Xtensa LX7 processor, up to 240MHz

PSRAM: 8MB

Flash: 8MB

Power Input: DC 5V

Audio Codec: ES8311: 24-bit resolution, I2S protocol

Microphone: MEMS microphone, Signal-to-Noise Ratio (SNR): 65dB

Speaker: NS4150B amplifier chip + 8Ω@1W 1318 cavity speaker

Operating Temp: 0 ~ 40°C

Product Size: 24.0 x 24.0 x 16.8mm

Product Weight: 9.3g

Package Size: 85.0 x 65.0 x 17.0mm

Gross Weight: 15.6g

 

 

 Product Comparison

 

 

 Product details 

 

 

 Kindly Remind

Download Mode

To flash the firmware, press and hold the reset button (about 2 seconds) until the internal green LED lights up, then release it. The device is now in download mode and ready for flashing.