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 8Ω@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 8Ω@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
| Specification | Parameter |
|---|---|
| SoC | ESP32-S3-PICO-1-N8R8, Dual-core Xtensa LX7, up to 240MHz |
| Flash | 8MB |
| PSRAM | 8MB |
| Power Input | DC 5V |
| Audio Codec | ES8311, 24-bit resolution, I2S protocol |
| Microphone | MEMS microphone, 65dB SNR |
| Speaker | NS4150B amplifier + 8Ω@1W 1318 cavity speaker |
| Operating Temperature | 0 ~ 40°C |
| Product Size | 24.0 × 24.0 × 16.8 mm |
| Product Weight | 9.3 g |
| Package Size | 85.0 × 65.0 × 17.0 mm |
| Gross Weight | 15.6 g |
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.