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M5Stack Atomic Voice Base with Microphone and Speaker microphone side view

M5Stack Atomic Voice Base with Microphone and Speaker

SKU: M5-A149
Regular price 9,29 € Sale price 7,93 €
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M5Stack Atomic Voice Base with Microphone and Speaker white background angle view

M5Stack Atomic Voice Base with Microphone and Speaker

7,93 €

M5Stack Atomic Voice Base with Microphone and Speaker is a compact voice recognition base designed for the M5 Atom series. This Atomic Voice Base adds a complete audio input and output path to a compatible Atom host, combining the ES8311 mono audio codec, a MEMS microphone, and the NS4150B Class-D amplifier with a built-in 1W 8Ω speaker.

Unlike an integrated Atom Echo style controller, this product is a base module without its own main SoC. It is built for projects that need full-duplex audio, I2S voice interaction, voice wake-up, speech playback, and compact smart home voice control. It is especially useful when paired with an AtomS3R host for Home Assistant, OpenAI voice assistant, and other embedded voice assistant workflows.

M5Stack Atomic Voice Base hardware overview

Features

  • Built for the M5 Atom series, adding microphone and speaker capability through the Atom base interface.
  • ES8311 mono audio codec with 24-bit resolution and 16KHz to 64KHz sampling support.
  • MEMS microphone optimized for voice recognition and embedded audio input.
  • NS4150B Class-D amplifier driving a built-in 1W @ 8Ω speaker.
  • Full-duplex audio communication for simultaneous input and output.
  • I2S-based audio path suitable for wake word, voice interaction, and playback workflows.
  • Compact 24 × 24 mm footprint that matches the Atom family form factor.
  • Official support materials for Arduino, UiFlow2, and ESP-IDF based development.

Specifications

Specification Parameter
Product Type Atomic Voice Base for M5 Atom series
Audio Codec ES8311, 24-bit resolution, I2S protocol
MEMS Microphone MSM381A3729H9BPC, SNR ≥ 65 dB
Power Amplifier NS4150B Class-D amplifier
Speaker 2014 cavity speaker, 1W @ 8Ω
Sampling Rate 16KHz to 64KHz
Standby Current DC 3.3V / 3.36mA
Operating Current DC 3.3V / 14.84mA
Operating Temperature 0 to 40°C
Product Size 24.0 × 24.0 × 14.1mm
Product Weight 6.5g
Package Size 85.0 × 65.5 × 15.0mm
Gross Weight 12.5g

Applications

Atomic Voice Base is a practical choice for embedded voice interaction, smart home voice control, custom voice assistant terminals, and compact M5Stack audio projects. M5Stack's own materials show it used with AtomS3R for Home Assistant voice assistant, OpenAI-based voice assistant, and XiaoZhi voice assistant workflows.

  • Home Assistant voice assistant nodes with AtomS3R
  • OpenAI voice assistant and embedded real-time voice interaction
  • Wake-word and voice response projects for smart devices
  • Interactive education projects based on the M5 Atom ecosystem
  • Compact IoT audio control terminals with microphone and speaker

M5Stack Atomic Voice Base Home Assistant application

Related OpenELAB article: How to Build Your Own Personal Voice Assistant

Product List

  • 1 × Atomic Voice Base

Other Content

PinMap

Left Signal Pin Pin Right Signal
1 3V3
SCL 2 3 DIN
SDA 4 5 LRCK
5V 6 7 DOUT
GND 8 9 SCK

Hardware reference

M5Stack Atomic Voice Base schematic overview

Practical note: this base is intended to be paired with an M5 Atom host. If you want an all-in-one voice development unit with the controller already onboard, see M5Stack ATOM Voice Smart Speaker Development Kit.

Resources

FAQ

Does Atomic Voice Base include the main controller?
No. Atomic Voice Base is a base module for the M5 Atom series and does not include its own standalone host controller.

What is the difference between Atomic Voice Base and ATOM Voice / Atom Echo?
Atomic Voice Base provides the microphone, codec, amplifier, and speaker base, while ATOM Voice / Atom Echo is the integrated version with the controller already built in.

Can it be used for Home Assistant or OpenAI voice assistant projects?
Yes. M5Stack provides official tutorials for Home Assistant, OpenAI voice assistant, and other voice assistant workflows built around AtomS3R + Atomic Voice Base.

1. General Shipping Information

  • We provide reliable shipping services with a tracking number for each order.
  • Shipping addresses must be entered in English and should not contain special symbols, so that the courier system can recognize your location correctly.
  • Please make sure your shipping address is accurate before placing your order. We ship strictly according to the address provided at checkout.
  • In-stock orders are usually dispatched within 1 business day after order confirmation.
  • Estimated delivery times refer to the period after dispatch and do not include order processing time, weekends, public holidays, customs inspection, or force majeure delays.
  • If you need to cancel or modify your order, please contact us before the order is marked as “Shipped”. Once shipped, the order cannot be canceled or changed.

🚀 Need Faster Shipping?

If you require expedited shipping, please contact our customer support team at info@openelab.io for a customized quote based on your destination.

2. Shipping Rates & Options

Shipping rates are calculated based on order value, destination, and available shipping methods. The final available options will be displayed at checkout.

2.1 Germany Domestic Shipping

Shipping Method Order Value Cost Est. Delivery
Deutsche Post €0.00 - €50.00 €4.95 2-4 Business Days
Deutsche Post Over €50.00 Free 2-4 Business Days
DHL Paket
(Faster Delivery)
€0.00 - €50.00 €6.95 1-3 Business Days
DHL Paket
(Faster Delivery)
€50.00 - €100.00 €2.00 1-3 Business Days
DHL Paket
(Faster Delivery)
Over €100.00 Free 1-3 Business Days

2.2 Selected EU Countries / Regions

Available EU shipping destinations are shown at checkout based on your shipping address. For orders shipped to selected EU countries or regions outside Germany, we use FedEx Regional Economy.

Shipping Method Order Value Cost Est. Delivery
FedEx Regional Economy €0.00 - €100.00 €7.95 3-5 Business Days
FedEx Regional Economy Over €100.00 Free 3-5 Business Days

EU orders may be fulfilled from our Munich warehouse or, when applicable, from our Shenzhen warehouse depending on inventory availability. For EU member states, OpenELAB covers applicable import duties and taxes under DDP service where required.

2.3 United States

Region Shipping Method Order Value Cost Est. Delivery
Continental U.S.
(50 States)
USPS Ground Advantage €0.00 - €45.00 €4.95 3-7 Business Days
USPS Ground Advantage Over €45.00 Free 3-7 Business Days
USPS Priority Mail €0.00 - €45.00 €16.95 1-4 Business Days
USPS Priority Mail Over €45.00 €14.95 1-4 Business Days
Non-Continental U.S.
(AK, HI, PR, etc.)
USPS Ground Advantage €0.00 - €60.00 €6.95 5-9 Business Days
USPS Ground Advantage Over €60.00 Free 5-9 Business Days

Non-Continental U.S. regions include Alaska, American Samoa, Guam, Hawaii, the Marshall Islands, the Northern Mariana Islands, Palau, Puerto Rico, the U.S. Virgin Islands, and U.S. Armed Forces addresses.

2.4 International Destinations Outside the EU

For selected international destinations outside the EU, including Switzerland, the United Kingdom, and Norway, shipping rates are as follows:

Order Amount Shipping Cost
€0.00 - €300.00 €19.95
Over €300.00 Free

For non-EU destinations, import duties, taxes, and customs fees may be charged by the destination country and are the responsibility of the recipient.

3. Warehouses & Fulfillment

Our products may be stored in our Munich, Arlington, and Shenzhen warehouses. The actual shipping warehouse depends on product availability and destination.

3.1 Munich Warehouse

For products stored in our Munich warehouse, we use Deutsche Post or DHL Paket for domestic deliveries within Germany. For selected EU destinations outside Germany, we use FedEx Regional Economy.

3.2 Arlington Warehouse

For products stored in our Arlington warehouse, we use USPS or UPS for deliveries within the United States.

3.3 Shenzhen Warehouse

For pre-order items or products fulfilled directly from our Shenzhen warehouse, we arrange reliable international shipping based on destination and inventory status. For EU member states, OpenELAB covers applicable import duties and taxes under DDP service where required.

4. Inventory, Pre-orders & Split Shipments

  • Inventory Status: Please check the product page for real-time stock information. If an item is out of stock in our local warehouses, it may be marked as “Pre-order”.
  • Pre-order Fulfillment: Pre-order items may be shipped directly from Shenzhen or restocked to a local warehouse first before final delivery.
  • Split Shipments: If your order contains both in-stock and pre-order items, we may ship them separately. No additional shipping fee will be charged for split shipments caused by our fulfillment arrangement.

5. Customs, Taxes & Delivery Issues

5.1 Customs and Taxes

For EU Member States:
Whether shipped from Germany or China, OpenELAB covers applicable import duties and taxes under DDP service where required. Customers in EU member states should not be charged additional import duties or VAT upon delivery.

Important Notice for Non-EU Countries:
For destinations outside the European Union, such as Switzerland, Norway, and the United Kingdom, import duties, taxes, and customs fees may be charged by local authorities upon delivery. These fees are the responsibility of the recipient.

5.2 Damaged, Delayed, or Lost Parcels

Please inspect your parcel upon delivery where possible. If you notice visible damage, please report it to the courier and contact us as soon as possible. This does not affect your statutory consumer rights.

If your parcel is delayed, lost, returned to sender, or the tracking information has not updated for an unusual period of time, please contact us at info@openelab.io. We will assist you in checking the shipment status with the courier.

5.3 Incorrect Address or Failed Delivery

If a parcel cannot be delivered due to an incorrect or incomplete address provided by the customer, refusal of delivery, or failure to collect the parcel, additional shipping or return costs may apply.

6. VAT

For orders within the EU, VAT is collected at checkout according to the applicable destination rules. No additional VAT should be collected upon delivery for EU member state orders covered under our DDP shipping arrangement.

Customer Reviews

Based on 3 reviews
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A
Avery Collins
M5Stack Atomic Voice Base with Microphone and Speaker: reliable daily performance

After working with M5Stack Atomic Voice Base with Microphone and Speaker for a while the overall experience felt stable and predictable. The unit feels well made and has performed consistently in normal use.

R
Riley Parker
M5Stack Atomic Voice Base with Microphone and Speaker: smooth first setup

I added M5Stack Atomic Voice Base with Microphone and Speaker to a recent project and found the initial setup straightforward. It has remained dependable and delivered the result I expected.

C
Cameron Hayes
M5Stack Atomic Voice Base with Microphone and Speaker: solid performance

The M5Stack Atomic Voice Base with Microphone and Speaker arrived in good condition and fitted neatly into my existing setup. It meets my needs with only minor room for improvement in the setup process.