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.
