Seeed Studio ReSpeaker Lite 2-Mic Array Voice Kit ESPHome ESP32-S3
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Seeed Studio ReSpeaker Lite 2-Mic Array Voice Kit ESPHome ESP32-S3
🧠 Powered by XMOS XU316 AI Sound & Audio Chipset, this high-performance, open-source development kit is built for next-gen voice assistant applications 🎙️🤖.
🔊 Integrated with ReSpeaker Lite Dual-Microphone Array and the mighty XIAO ESP32S3 processor, it delivers:
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🗣️ Exceptional voice recognition
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🔇 Advanced noise reduction
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🎛️ Intelligent voice processing via onboard AI NLU algorithms
🏡 Smart Home Ready: Seamlessly integrates with Home Assistant via ESPHome, making it perfect for:
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🏠 Smart voice assistants
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🔌 Home automation systems
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📡 IoT voice interfaces
💡 Whether you're prototyping or deploying, this kit brings clarity, intelligence, and flexibility to your voice-enabled projects.
Features
🔌 Pre-Soldered ESP32 Controller A powerful XIAO ESP32S3 comes pre-soldered via I2S pins, offering a hassle-free, solderless setup for rapid development and seamless integration 🧩.
🎙️ Dual Microphone Array for Far-Field Voice Capture Two high-performance digital microphones capture voice from up to 3 meters, even in noisy environments 🌪️. Point noise is intelligently cancelled using dual input for crystal-clear speech recognition 🗣️.
🧠 Onboard Audio Front-End Algorithms Driven by the XMOS XU-316 AI Sound & Audio Chip, the kit features advanced Natural Language Understanding (NLU) algorithms:
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🚫 Interference Cancellation (IC)
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🔁 Acoustic Echo Cancellation
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🔇 Noise Suppression
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📈 Automatic Gain Control (AGC) All working together to ensure high-quality voice capture in real time.
💻 Open Source Friendly Fully compatible with Arduino, PlatformIO, MicroPython, and CircuitPython, making it perfect for developers who love flexibility and customization 🔧.
🗣️ Works with Popular Voice Assistants Build your own natural language processor and connect it to:
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🏠 Home Assistant via ESPHome
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🗨️ Amazon Alexa Voice Service
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🔍 Google Assistant
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☁️ Cloud Speech-to-Text APIs Enable voice commands and smart interactions across your applications.
🌈 Onboard RGB LED Includes a programmable WS2812 RGB LED, perfect for custom lighting effects and visual feedback 🎨.
Specification
- General
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Core Chip |
XMOS XU316 |
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Digital Microphones |
High-Performance Digital Microphones * 2 |
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Sensitivity |
-26 dBFS |
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Acoustic Overload Point |
120 dBL |
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SNR |
64 dBA |
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Power Supply |
USB 5V, External 5V |
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Dimensions |
35*86 mm |
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Audio Output |
Speaker Connector / 3.5mm Headphone Jack |
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Maximum Sampling Rate |
16Khz |
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Speaker |
Supports 5W Amplifier Speakers. |
- XIAO ESP32S3
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Processor |
ESP32-S3R8 |
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Xtensa LX7 dual-core, 32-bit processor running up to 240 MHz |
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Wireless |
Complete 2.4GHz WiFi subsystem |
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BLE: Bluetooth 5.0, Bluetooth mesh |
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On-chip Memory |
8M PSRAM & 8MB Flash |
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Interface |
1x UART, 1x IIC, 1x IIS, 1x SPI,11x GPIO(PWM), 9x ADC, 1x User LED, 1x Charge LED |
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1x Reset button, 1x Boot button |
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Dimensions |
21 x 17.5mm |
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Power |
Input voltage (Type-C): 5V Input voltage (BAT): 4.2V |
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Circuit operating Voltage (ready to operate): - Type-C: 5V@19mA - BAT: 3.8V@22mA |
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Charging battery current: 100mA |
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Low Power Consumption Model (Supply Power: 3.8V) |
Modem-sleep Model: ~ 25 mA Light-sleep Model: ~ 2mA Deep Sleep Model: ~ 14 μA |
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WiFi Enabled Power Consumption |
Active Model: ~ 100 mA |
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BLE Enabled Power Consumption |
Active Model: ~ 85 mA |
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Working Temperature |
-40°C ~ 65°C |
Hardware Overview
- Hardware Flowchart

- Hardware Diagram


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1 |
Dual Microphone Array |
Provides high-quality audio input. |
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2 |
Power Indicator Light |
Illuminates when powered on. |
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3 |
RGB Light |
Programmable WS2812, provides visual feedback. |
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4 |
Mute Indicator Light |
Lights up red when the mute button is pressed. |
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5 |
USR Button |
User-defined button. |
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6 |
Mute Button |
Mutes audio input when pressed. |
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7 |
XIAO ESP32S3 |
For further development and integration. |
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8 |
XU316 Core Processor |
Responsible for audio processing and transmission. |
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9 |
External Power Supply Solder Pad |
Supports external 5V power supply. |
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10 |
USB Type-C Port |
Used for power and data transmission. |
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11 |
Speaker Connector |
For audio output. Supports 5W amplifier speakers. |
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12 |
3.5mm Headphone jack |
Output audio, We can plug active speakers or Headphones into this port. |
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13 |
External power pad 1 |
Unused IO pins on the XIAO ESP32. |
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14 |
External power pad 2 |
Unused IO pins on the XU316. |
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15 |
JTAG |
For debugging and programming the XU316. |

- Pinout Diagram of XIAO ESP32S3

Application
- Smart Speakers and Virtual Assistants: Work with Amazon Alexa and Google Assistant to improve voice command recognition.
- Audio Processing Development: Suitable for projects involving audio signal processing and analysis.
- Conference Systems: Ensures clear communication during video and audio conferences.
- Voice-Bsed Remote Control Cars
- Keywords Spotting and Wake up

1. General Shipping Information
- We provide premium shipping methods with a tracking number for each order.
- Shipping addresses must be entered in English without special symbols to help the courier company recognize your address in the system. We will ship strictly according to the shipping address you provided. Please notify us of any address change before your order is marked "Shipped" to avoid parcel loss.
- Please contact our customer service staff immediately if you need to cancel or change an order. Once your order has reached "Shipped" status, it can no longer be canceled or changed in any way. To avoid complications, please recheck your shopping cart before checkout.
- We can ship all in-stock orders within 1 business day after your order has been confirmed.
- All items are inspected before dispatch and are carefully hand-packed.
- With standard courier practice, you need to check the contents of the parcel before signing for your goods. Otherwise, we will not be held responsible for any damage that may have occurred in transit.
🚀 Need Faster Shipping?
If you require expedited shipping (Express), please contact our customer support team at info@openelab.io for a customized quote tailored to your location.
2. Shipping Rates & Options
Our shipping rates are calculated based on the order value and destination. Please refer to the tables below for details.
2.1 Germany (Domestic)
| Shipping Method | Order Value | Cost | Est. Delivery |
|---|---|---|---|
| Deutsche Post | €0 - €50.00 | €4.95 | 2-4 Business Days |
| Deutsche Post | Over €50.00 | Free | 2-4 Business Days |
|
DHL Paket (Faster Delivery) |
€0 - €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 European Union (EU)*
*Including:
| Shipping Method | Order Value | Cost | Est. Delivery |
|---|---|---|---|
| Deutsche Post | €0 - €100.00 | €7.95 | 5-9 Business Days |
| Deutsche Post | Over €100.00 | Free | 5-9 Business Days |
|
DHL Paket (Faster Delivery) |
€0 - €100.00 | €15.95 | 3-7 Business Days |
|
DHL Paket (Faster Delivery) |
€100.00 - €250.00 | €7.95 | 3-7 Business Days |
|
DHL Paket (Faster Delivery) |
Over €250.00 | Free | 3-7 Business Days |
2.3 United States
| Region | Shipping Method | Order Value | Cost | Est. Delivery |
|---|---|---|---|---|
|
Continental U.S. (50 States) |
USPS Ground Advantage | €0 - €45.00 | €5.95 | 3-7 Business Days |
| USPS Ground Advantage | Over €45.00 | Free | 3-7 Business Days | |
| USPS Priority Mail | €0 - €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 - €60.00 | €6.95 | 5-9 Business Days |
| USPS Ground Advantage | Over €60.00 | Free | 5-9 Business Days |
* The regions in the Non-Continental U.S. include: Alaska, American Samoa, Guam, Hawaii, the Marshall Islands, the Northern Mariana Islands, Palau, Puerto Rico, the U.S. Virgin Islands, and all U.S. Armed Forces addresses. The shipping and delivery to these areas are subject to the Non-Continental U.S. shipping rules.
2.4 International (Outside EU)
For specific international destinations, including Switzerland, United Kingdom, and Norway.
| Order Amount | Shipping Cost |
|---|---|
| €0 - €300.00 | €19.95 |
| Over €300.00 | Free |
Important Notice:
- Inventory Status: Please check the inventory status on the product page. Our system displays real-time stock for our Munich and Long Beach warehouses. If an item is out of stock in these locations, it will be marked as "Pre-order". You can still place an order for these items.
- Pre-order Fulfillment: For "Pre-order" items, we arrange the most efficient logistics solution to ensure you receive your goods as quickly as possible. Your package may be shipped directly from our Shenzhen warehouse. Alternatively, as part of our standard restocking process, we may transport the goods to our Munich or Long Beach warehouse first (typically taking 5-10 business days) before dispatching them to you.
- Split Shipments: If your order contains both in-stock and Pre-order items, we will prioritize shipping the in-stock items from the local warehouse immediately. The remaining Pre-order items will be sent to you in a separate shipment once they are ready.
3. International Warehouse
Our products are stored in our Munich, Long Beach, and Shenzhen warehouses to provide more flexible logistics solutions tailored to different regions and customer needs. On each product's description page, we indicate the specific warehouse location to help you better plan your purchase and delivery schedule.
3.1 German Warehouse
For products stored in our warehouse in Munich, we use either Deutsche Post or DHL for shipping, depending on the size of the package. Logistics within Germany are very efficient, with an estimated delivery time of 2-4 business days, ensuring you receive your order quickly and conveniently. For Western EU countries, the estimated delivery time is 4-6 business days. For Eastern EU countries, the estimated delivery time is 6-8 business days.
3.2 US Warehouse
For products stored in our warehouse in Long Beach, we use either USPS or UPS for shipping, depending on the size of the package. Logistics within U.S. are very efficient, with an estimated delivery time of 3-7 business days, ensuring you receive your order quickly and conveniently.
3.3 Chinese Warehouse
For Pre-order items or orders fulfilled directly from our Shenzhen warehouse, we utilize YunExpress for reliable international shipping. Given the complexities of international shipping, the estimated delivery time for these packages is around 10 business days, though this may vary slightly due to customs processes or other uncontrollable factors. Otherwise, products will be restocked to our Munich or US warehouses before final delivery, as detailed in the "Important Notice" above.
4. Customs and Taxes
4.1 How are customs handled by OpenELAB for import or export?
For EU Member States: Whether shipped from Germany or China, we cover all import duties and taxes (DDP), ensuring that you receive your package without any additional costs or hassle with customs.
For countries outside of the European Union, such as Switzerland and Norway, you may be subject to import duties, taxes, and/or customs fees charged upon delivery. These fees vary from country to country and are the sole responsibility of the recipient.
⚠️ Refusal of Delivery: If you refuse to pay these fees upon delivery and the package is returned to us, the refund amount will be calculated after deducting the original shipping costs, return shipping costs, and any applicable customs or storage fees.
4.2 How is VAT charged when the Customer places an order from OpenELAB?
In accordance with the newest VAT e-commerce rules in the EU, OpenELAB shall have the right to charge the amount of VAT at checkout. The standard rate of actual VAT applied is subject to the destination country's regulations. No additional VAT will be charged upon delivery for these orders.






