M5Stack Atom VoiceS3R Smart Speaker Dev Kit is a compact IoT voice interaction controller built for intelligent voice control, human-computer interaction, and compact AI voice assistant projects. It is powered by the ESP32-S3-PICO-1-N8R8 main controller, supports 2.4GHz Wi-Fi, and integrates 8MB Flash + 8MB PSRAM for richer voice and IoT applications.

The audio section uses an ES8311 mono codec, a high-sensitivity MEMS microphone, and an NS4150B amplifier with an 8@1W speaker, giving this VoiceS3R kit clear voice pickup and more capable audio playback for smart interaction, embedded control, and connected audio scenarios.

Features

• ESP32-S3-PICO-1-N8R8 dual-core Xtensa LX7 main controller, up to 240MHz.
• 8MB Flash + 8MB PSRAM for more capable voice and embedded applications.
• ES8311 mono audio codec with I2S audio support.
• High-sensitivity MEMS microphone for voice capture.
• NS4150B Class-D amplifier with 8@1W speaker output.
• Integrated infrared transmitter for additional control scenarios.
• Expandable pins and interfaces for peripheral integration.
• Arduino, UiFlow2, ESP-IDF, and PlatformIO development support.
• Compact 24.0 24.0 16.8 mm body for embedded and desktop voice projects.

Specifications

Applications

The Atom VoiceS3R is designed for AI voice assistants, smart home voice control, human-computer interaction, and compact ESP32-S3 IoT voice controller projects.

• AI voice assistants and spoken command interfaces
• Smart home control nodes and voice-enabled automation
• IoT interaction terminals with audio input and output
• Embedded R&D and education around voice and ESP32-S3 development
• Compact wireless voice devices and connected audio concepts

Product List

• 1 Atom VoiceS3R

Other Content

Development and integration notes

• Audio-focused hardware: the ES8311 + NS4150B architecture is designed for clearer voice interaction and playback workflows.
• Infrared control: the integrated IR transmitter gives the board additional device-control potential in automation projects.
• Multi-platform workflow: official materials list Arduino, UiFlow2, ESP-IDF, and PlatformIO, which makes the board flexible for both beginner and advanced development.

Related reading

• M5Stack ATOMS3R: A Must-Have for Smart Hardware Developers
• How Many Types of M5Stack ATOM S3 Are Available?

Resources

• Official Product Documents
• Official Atom EchoS3R Documentation
• Official Arduino Guide
• UiFlow2
• Official ESP-IDF Guide
• Official M5Burner Guide
• Official Home Assistant Overview

FAQ

Is M5-C126-Echo part of the S3R generation?
Yes. M5-C126-Echo is the Atom VoiceS3R / EchoS3R generation based on ESP32-S3.

What are the key hardware highlights?
The main highlights are ESP32-S3-PICO-1-N8R8, 8MB Flash + 8MB PSRAM, and the ES8311 + NS4150B audio architecture.

Which platforms can I use to develop with it?
Official materials list Arduino, UiFlow2, ESP-IDF, and PlatformIO.