Atom VoiceS3R - programmable speaker - ESP32 - M5Stack C126-ECHO

Index: MSS-27570 EAN: 6972934176189

The Atom VoiceS3R (formerly Atom EchoS3R) is a compact and powerful IoT module for voice interaction , based on the ESP32-S3 with 8MB of Flash and 8MB of PSRAM . Equipped with the ES8311 audio codec, a MEMS microphone, and an NS4150B amplifier , it provides high-quality audio recording and playback. Its 2.4GHz WiFi connectivity and extensive pinout make it ideal for voice assistants, smart home systems, and HMI projects.

Atom VoiceS3R - programmable speaker - ESP32 - M5Stack C126-ECHO
€14.90
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Manufacturer: M5Stack

Product description: Atom VoiceS3R - programmable speaker - ESP32 - M5Stack C126-ECHO

The Atom VoiceS3R is a programmable IoT controller for voice interaction , designed for intelligent voice control and human-computer interaction scenarios. Built on the ESP32 -S3-PICO-1-N8R8 chip, it supports 2.4 GHz WiFi wireless connectivity and is equipped with 8 MB of Flash and 8 MB of PSRAM , providing excellent performance and flexibility for application development. The audio system, based on the ES8311 mono codec, a high-sensitivity MEMS microphone , and an NS4150B power amplifier , enables clear voice pickup and high sound quality, improving speech recognition and interaction. It is ideal for voice interaction scenarios such as AI voice assistants and smart home control.

Atom VoiceS3R - programmable speaker - ESP32 - M5Stack C126-ECHO

Atom VoiceS3R - programmable speaker - ESP32 - M5Stack C126-ECHO.

Atom VoiceS3R - programmable speaker - ESP32 - M5Stack C126-ECHO

Additional modules can be connected using the Grove interface.

Atom VoiceS3R Main Features

  • Powerful ESP32-S3-PICO-1-N8R8 chip : Provides high computing power with a dual-core LX7 processor clocked at up to 240 MHz, enabling smooth processing of voice commands
  • Expanded 8 MB Flash and 8 MB PSRAM memory : allows for more complex audio models and extended IoT projects
  • ES8311 audio codec : offers 24-bit audio processing and clear, low-noise playback
  • Highly sensitive MEMS microphone : high signal-to-noise ratio (65 dB) enables precise speech capture even in difficult acoustic conditions
  • Built-in NS4150B amplifier and 1W speaker : provide clear and loud sound playback
  • 2.4 GHz WiFi connectivity : enables integration with online services, voice controls and communication in IoT systems
  • Built-in infrared transmitter : allows you to control IR devices such as TVs, air conditioners and electronics
  • Compact dimensions of 24 x 24 x 16.8 mm : allows for easy integration into enclosures, portable devices and DIY projects
  • Support for multiple development environments : Arduino, UiFlow2, ESP-IDF and PlatformIO give you complete freedom to create

Pinouts and compatibility

The Atom VoiceS3R offers a wide range of pinout options for integration with a variety of components. Thanks to GPIO, I2S, and expansion connectors , it can interface with other IoT modules and systems, making it a versatile solution for projects requiring expansion. Additionally, Atom VoiceS3R is compatible with popular development platforms , making integration with existing IoT systems and device control quick and intuitive.

Module programming

Atom VoiceS3R supports a variety of development environments, making it suitable for a wide range of applications. The ability to program in popular environments like Arduino IDE , UiFlow2 , ESP-IDF , and PlatformIO allows for flexibility in tool selection. Support for both traditional coding methods and graphical platforms allows you to create everything from simple prototypes to more advanced interactive applications, such as AI voice assistants.

Atom EchoS3R - programmable speaker - ESP32 - M5Stack C126-ECHO


The VoiceS3R atom can be used in systems using voice control.

Atom VoiceS3R - programmable speaker - ESP32 - M5Stack C126-ECHO

The module has a USB type C connector.

Differences from Atom Voice

The Atom VoiceS3R differs from the standard Atom Voice in terms of memory, audio quality, and performance. Equipped with 8 MB of PSRAM and 8 MB of Flash, the Atom VoiceS3R offers higher performance , allowing it to support more advanced applications. Additionally, the Atom VoiceS3R offers improved audio components , such as the ES8311 codec and a MEMS microphone with a higher signal-to-noise ratio , which translates to better speech recognition and higher audio quality than the Atom Voice. These improvements make the Atom VoiceS3R suitable for more advanced applications, such as integration with AI voice assistants and smart home control systems.

Atom VoiceS3R Technical Specifications

  • Controller: ESP32-S3-PICO-1-N8R8 @ dual-core Xtensa LX7, up to 240MHz
  • PSRAM memory: 8 MB
  • Flash memory: 8 MB
  • Power supply: DC 5V
  • Audio coding: ES8311, 24-bit resolution, I2S protocol
  • Microphone: MEMS, SNR: 65 dB
  • Speaker: Amplifier NS4150B + speaker 8Ω @ 1W 1318
  • Operating temperature range: 0°C to 40°C
  • Dimensions: 24 x 24 x 16.8 mm
  • Weight: 9.3 g

Contents of the set

  • 1x Atom VoiceS3R
Atom VoiceS3R - programmable speaker - ESP32 - M5Stack C126-ECHO

Programmable speaker based on the M5Atom module.

Voltage output from 5.0 V
Output voltage to 5.0 V
UC - Microcontroller ESP32-S3
UC - Flash 8 MB
UC - RAM 8 MB
UC - WiFi yes
UC - USB USB C
UC - UART yes
UC - Connector USB typ C
Niebezpieczne Component
Package width 6.6 cm
Package height 8.5 cm
Package depth 1.8 cm
Package weight 0.016 kg

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Product reviews

Atom VoiceS3R - programmable speaker - ESP32 - M5Stack C126-ECHO

4.7/5

Average grade

3

Customers opinion
The following opinions are collected
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an external partner Trustmate
and come from the post-purchase process.
Adam 19.03.2026 Confirmed purchase Translated review
so small !! I didn't expect it to be such a small thing :) beautifully packaged, the case is great with a practical button.
Juergen 23.02.2026 Confirmed purchase Translated review
The Echo was supposed to become a voice assistant quickly and easily in Home Assistant (OS). At first glance, it worked well (ESOHome integration). During the first language test, the module crashed during the second wake word (visible in the log). Reproducible. The i2c bus is shared between the microphone and the speaker and is not released properly. Unfortunately, I have no idea where I can get proper support in this regard. I trust the people who maintain the package (which is read into the SRC) that the problem will be solved sooner or later. At the moment, the Echo is a dead device. My criticism: A direct contact person (technology) for the EchoS3R should be there. The Adafruit 5639 High Power Infrared LED Emitter Module is excellent. The GPIO I2C pin expander Adafruit 4886 is for the "tinkering box". I trust that it has already proven itself many times over.
Pia 18.06.2026 Confirmed purchase

Country of Origin: China

Manufacturer Contact Details: M5Stack Technology Co Ltd Block A10, Expo Bay South Coast Shenzhen , Fuhai Street, Bao'an District

EU Marketer Contact Details: BOTLAND B. DERKACZ SP. K. Gola 25A - 63-640 Bralin

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