The Atom EchoS3R Smart Speaker Dev Kit is a compact, programmable IoT voice interaction controller designed for intelligent voice control and human-computer interaction. Powered by the ESP32-S3-PICO-1-N8R8 dual-core processor, it supports 2.4GHz Wi-Fi connectivity and integrates 8MB Flash + 8MB PSRAM, delivering excellent performance and scalability for diverse application development.
Its professional audio system—featuring an ES8311 mono codec, high-sensitivity MEMS microphone, and NS4150B power amplifier—ensures clear voice capture and high-fidelity audio output, making it ideal for AI voice assistants, smart home control, and IoT innovation.
⚙️ Key Features
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High-performance SoC: ESP32-S3 dual-core Xtensa LX7 @ 240MHz
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Ample storage: 8MB Flash + 8MB PSRAM for complex applications
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Professional audio: ES8311 codec + MEMS microphone (65dB SNR)
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High-quality sound: NS4150B amplifier + 8Ω@1W speaker
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Infrared transmitter: Built-in IR for device control
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Expandable interfaces: Flexible pinouts for peripheral integration
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Multi-platform support: Arduino, UiFlow2, ESP-IDF, PlatformIO
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Compact design: Only 24 × 24 × 16.8 mm, 9.3 g
📊 Technical Specifications
| Parameter | Details |
|---|---|
| SoC | ESP32-S3-PICO-1-N8R8, Dual-core Xtensa LX7, up to 240MHz |
| Memory | 8MB Flash + 8MB PSRAM |
| Audio Codec | ES8311, 24-bit resolution, I2S protocol |
| Microphone | MEMS mic, 65dB SNR |
| Speaker | NS4150B amplifier + 8Ω@1W speaker |
| Power Input | DC 5V |
| Dimensions | 24.0 × 24.0 × 16.8 mm |
| Weight | 9.3 g |
| Operating Temp | 0 ~ 40°C |
💡 Application Scenarios
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AI Voice Assistants – Build personalized voice-enabled devices
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Smart Home Control – Voice control for lighting, appliances, and security
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IoT Development – Rapid prototyping and product deployment
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Education & Research – Embedded AI and voice recognition projects
📊 Atom EchoS3R vs Atom Echo
| Feature | Atom EchoS3R | Atom Echo |
|---|---|---|
| SoC | ESP32-S3-PICO-1-N8R8 (Dual-core Xtensa LX7, up to 240MHz) | ESP32-PICO-D4 |
| Flash | 8MB | 4MB |
| PSRAM | 8MB | None |
| Audio Solution | ES8311 codec + NS4150B amplifier | NS4168 amplifier + SPM1423 mic |
| Microphone | MEMS microphone (65dB SNR) | SPM1423 microphone |
| Speaker | NS4150B amplifier + 8Ω@1W speaker | Built-in speaker |
| Infrared Transmitter | ✅ Integrated | ❌ Not available |
| RGB LED | ❌ None | ✅ WS2812 x1 |
| Development Platforms | Arduino, UiFlow2, ESP-IDF, PlatformIO | Arduino, UiFlow, ESP-IDF |
| Dimensions | 24 × 24 × 16.8 mm | Similar (slightly different) |
| Weight | 9.3 g | Slightly lighter |
📘 Tutorials & Development Resources
Atom EchoS3R is not just hardware—it comes with comprehensive tutorials and software support to help developers get started quickly:
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Arduino IDE Quick Start – Step-by-step guide to program and control Atom EchoS3R.
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XiaoZhi Voice Assistant – Build your own personal voice assistant by flashing firmware via M5Burner.
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M5Unified & M5GFX Libraries – Official libraries for graphics and unified device management.
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PlatformIO Environment – Pre-configured settings for seamless development.
👉 These resources make it easy for beginners and professionals alike to bring their IoT voice projects to life.
🔧 Easy Firmware Flashing
Entering Download Mode is simple:
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Press and hold the reset button for ~2 seconds until the internal green LED lights up.
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Release the button—the device is now ready for firmware flashing.
This streamlined process ensures fast prototyping and easy updates for developers.