The Atomic Echo Base is a voice recognition base designed specifically for the M5 Atom series. It uses an integrated solution with the ES8311 mono audio decoder, MEMS microphone , and NS4150B power amplifier. The ES8311 offers 24-bit audio resolution and a sample rate of 16KHz to 64KHz, supporting I2S communication and high-fidelity audio processing. The MEMS microphone with high signal-to-noise ratio (SNR) is suitable for automatic speech recognition, while the built-in speaker ensures efficient audio output. The device supports full-duplex communication, enabling simultaneous voice transmission and reception, enhancing interactive features such as speech recognition, wake-up, and audio playback. It is ideal for applications in smart homes and education.
Features
- Compatible with the M5 Atom series
- Voice recognition
- Mono audio codec
- MEMS microphone
- Class-D amplifier
- Speaker
- Development platform
Related articles
How to Build Your Own Personal Voice Assistant with M5Stack AtomS3R and Atomic Echo Base
Includes
- 1x Atomic Echo Base
Applications
✅ Smart Manufacturing
Monitor equipment status, automate workflows, and collect sensor data to streamline production lines.
✅ Industrial Remote Monitoring
Leverage RS485/CAN interfaces and EZData cloud platform to enable real-time control and diagnostics over the web.
✅ Distributed Energy Management
Measure voltage and current via built-in sensors, control relay switches for smart energy distribution in solar and storage systems.
✅ Environmental Monitoring & Control
Connect Grove-compatible modules to track humidity, temperature, or light, and automate responses accordingly.
✅ IIoT Education & Prototyping
Ideal for developers, educators, and engineers building and testing industrial IoT applications.
Specifications
| Specification | Parameter |
|---|---|
| Audio Codec | ES8311: 24-bit resolution, I2S protocol |
| MEMS Microphone | MSM381A3729H9BPC, SNR ≥ 65 dB |
| Power Amplifier | NS4150B: Class-D power amplifier |
| Speaker | 2014-type cavity speaker: 1W@8Ω |
| Standby Current | DC3.3V/3.36mA |
| Operating Current | DC3.3V/14.84mA |
| Operating Temperature | 0-40°C |
| Product Size | 24.0 * 24.0 * 14.14mm |
| Product Weight | 6.3g |
| Packaging Size | 85.0 * 65.5 * 15.0mm |
| Packaging Weight | 12.5g |
Schematics
Datasheets
Atomic Echo Comparison
| Spec | Atomic Echo Base | Atom ECHO |
|---|---|---|
| Solution | Base (No SoC) | Built-in SoC (ESP32-PICO-D4) |
| MIC | MSM381A3729HBPC | SPM1423 |
| Amplifier | NS4150B@Class D amplifier | NS4150B@Class D amplifier |
| Speaker | 1W@8Ω | 0.5W@8Ω |
| Audio Sampling Rate | 16KHz-64KHz | 8kHz-96kHz |
| Programmable RGB/Button | / | SK6812 |
| Communication Mode | Full-duplex | Half-duplex |
❓ FAQ
▪️ What communication protocols are supported?
Built-in support for CAN and RS485 (Modbus), plus ESP32-S3 capabilities like MQTT, HTTP, and WebSocket for IoT applications.
▪️ Is it compatible with Arduino or other platforms?
Yes! Supported environments include:
-
UIFlow 2.0 (block-based programming)
-
Arduino IDE
-
ESP-IDF (Espressif native SDK)
▪️ How does remote monitoring work?
Factory firmware pushes device data to M5Stack’s EZData Cloud, allowing users to visualize and control parameters via browser dashboards.
▪️ Can I drive high-power equipment directly?
The four onboard relays support:
-
AC: 5A @ 250V
-
DC: 5A @ 28V For high loads, consider intermediary circuitry or external relay modules.
▪️ Can I connect external sensors?
Yes, through Grove ports and GPIO expansion. Supports temperature, humidity, gas, light, and more.
▪️ What’s the installation method?
DIN-rail mountable for secure deployment inside industrial control panels.