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Atomic Voice Base - voice recognition module with microphone and speaker - expansion module for M5Atom - M5Stack A149
The Atomic Voice Base (formerly Atomic Echo Base) is a compact voice base designed specifically for the M5 Atom series . Equipped with a MEMS microphone, an ES8311 audio decoder, and an NS4150B amplifier , it enables voice recognition, high-quality audio recording, and playback. It supports full-duplex communication and integrates with popular development environments such as the Arduino IDE and UIFlow.
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Product description: Atomic Voice Base - voice recognition module with microphone and speaker - expansion module for M5Atom - M5Stack A149
Atomic Voice Base is a functional audio add-on designed for M5 Atom development modules. This extension allows you to build voice recognition, voice command, and audio playback systems in educational and smart home applications. Thanks to the 24-bit ES8311 codec and a MEMS microphone with a high signal-to-noise ratio, you get excellent recording and playback quality. The built-in speaker and class-D amplifier ensure clear and crisp sound. The module supports two-way audio transmission, making it ideal for interactive voice projects.
Also check out the user guide prepared by the manufacturer!
Atomic Voice Base - voice recognition module with microphone and speaker - expansion module for M5Atom - M5Stack A149.
Botland is an official distributor of the M5Stack module family in Poland. We have extended this system of stackable functional devices with accessories from our range and numerous blog guides. All M5Stack products presented here are original.
Atomic Voice Base uses an integrated solution with an ES8311 mono audio decoder, a MEMS microphone and an NS4150B power amplifier.
Main features of the Atomic Voice Base module
- M5 Atom Series Compatibility : Compatible with Atom Lite, Matrix, S3-Lite, S3R and other Atom series models
- Voice recognition support : ideal for interactive and voice control systems
- ES8311 Mono Audio Codec : Supports I2S, 24-bit resolution and sampling from 16 kHz to 64 kHz
- MEMS microphone : digital, high SNR ≥ 65 dB
- NS4150B Amplifier : 1W @ 8Ω Class D amplifier
- Built-in speaker : efficient and clear sound reproduction
- Full-duplex communication : simultaneous audio recording and playback
- Support for multiple development platforms : UIFlow 1.0, UIFlow 2.0, Arduino IDE
Compatibility and programming options
Atomic Voice Base is fully compatible with M5 Atom series devices such as Atom Lite , Matrix , AtomS3, AtomS3R , or AtomS3R CAM . Depending on the host model, appropriate I2S pins are used, which must be included in the program code. Programming is possible using the Arduino IDE, UIFlow 2.0, and ESP-IDF , allowing for flexible adaptation of functionality to the project. Ready-made libraries and examples are available for voice system users, such as OpenAI Voice Assistant for AtomS3R.
The module supports I2S communication.
The MEMS microphone is suitable for automatic speech recognition.
Pinouts and connection method
The module communicates with the host via the I2S bus . Depending on the Atom version (Lite, S3, S3R), pins such as SCL, SDA, LRCK, DSDIN, or SCLK must be assigned appropriately . Connections can be fixed (Fixed Connect) or switched (Switch Connect), which should be considered when designing the system. For the AtomS3 and AtomS3R models, pins G39, G38, G5, G6, G7, and G8 are used. Example configurations can be found in the official M5Stack documentation .
Practical applications
- Intelligent voice control systems for homes
- Interactive educational projects based on speech recognition
- Voice assistants and multimedia terminals
- Sound recording and playback systems
- Integrated IoT and AI learning solutions
In full duplex mode, it enables simultaneous voice transmission and reception.
The module is compatible with the M5 Atom series.
Technical specifications of the module
- Audio codec: ES8311, 24-bit, I2S interface
- Microphone: MSM381A3729H9BPC, SNR ≥ 65 dB
- Amplifier: NS4150B, Class D
- Speaker: 1 W at 8 Ω (2014 type)
- Standby current: 3.36 mA at 3.3 V
- Operating current: 14.84 mA at 3.3 V
- Operating temperature: 0°C to 40°C
- Dimensions: 24 x 24 x 14.14 mm
- Weight: 6.3 g
Contents of the set
- 1 x Atomic Voice Base
Useful links
- Manufacturer's website: M5Stack A149
- User Guide
- ES8311 Technical Documentation
- MEMS microphone technical documentation
- NS4150B Technical Documentation
- Arduino library
- ESP-IDF Library
- UiFlow2 Documentation
- Welcome to the market. M5Stack Atom - sandwich modules
| Name | Value |
|---|---|
| Width | 6.5 cm |
| Height | 8.5 cm |
| Depth | 2 cm |
| Weight | 0.013 kg |
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30 days to return, without giving a reason
If the product does not meet your expectations, you have 30 days from receiving the parcel to withdraw from the contract. The product only has to be complete. The right of return belongs to consumers (a purchase unrelated to business activity).
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If the product turns out to be faulty, you can make a claim under the guarantee or the statutory warranty. We handle claims without delay, at the latest within 14 working days of receiving the report together with the goods.
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Product information
This product is a component intended for further assembly or prototyping. It is not a finished product within the meaning of the product safety regulations.
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