M5Stack Atomic Audio 3.5 Base

The M5Stack Atomic Audio-3.5 Base adds high-quality voice recognition and audio playback to Atom series controllers, featuring a 3.5mm TRRS audio jack, MEMS microphone, ES8311 audio codec, and full-duplex audio support for smart voice interaction projects.

The M5Stack Atomic Audio-3.5 Base is a voice recognition and audio playback base designed for the Atom series controllers (not compatible with Atom Voice).

It integrates an ES8311 mono audio codec, a MEMS microphone, and an NS4150B power amplifier, equipped with a standard 3.5mm audio jack and a 4-segment TRRS connector (CTIA standard) to support both audio output and microphone input.

The ES8311 supports 24-bit audio resolution with a sampling rate range of 16kHz ~ 64kHz and communicates via the I2S interface, enabling high-fidelity audio processing.

The onboard MEMS microphone offers a high signal-to-noise ratio and digital output capability, optimized for automatic speech recognition scenarios, while the integrated speaker delivers efficient audio output. This base supports full-duplex communication for simultaneous audio transmission and reception, making it suitable for applications such as voice assistants, voice control terminals, smart home voice gateways, and voice interaction devices.

Features

• 3.5mm audio jack supporting audio output + microphone input
• Integrated ES8311 high-fidelity audio codec with 24-bit high-resolution audio processing
• Full-duplex voice communication with simultaneous audio send and receive
• Auto-switching functionality
  • Onboard audio source ↔ external microphone (auto-switch during playback)
  • Speaker ↔ external microphone (auto-switch during recording)

Specifications

Audio Codec	ES8311
MEMS Microphone	ME1502AM5G
Speaker	1W@8Ω NS4150B
Audio Interface	3.5mm Headphone Jack (SMID-5P, 5-pin)
Voltage Regulator	TPS7A2033PDQNR
GPIO Expander	PI4IOE5V6408ZTAEX
Power Consumption	Standby Mode: [email protected] Recording Mode: [email protected] 50% Volume Playback: [email protected] 100% Volume Playback: [email protected]
Product Size	48.0 x 24.0 x 17.5mm
Product Weight	12.0g

Resources

• Product documentation

Package Contents

• 1x Atomic Audio 3.5 Base
• 1x Hex Key L-Shape 1.5mm (For M2 Screw)
• 1x M2 8mm cap head machine screw

Please note that this is not compatible with the Atom Voice.