ReSpeaker Lite Voice Assistant Kit: XMOS XU316 and XIAO ESP32S3 Integration for Voice Recognition and Home Automation

The Seeed Studio’s ReSpeaker Lite Voice Assistant Kit by Seeed Studio features the XMOS XU316 AI sound chip and XIAO ESP32S3 processor. It includes dual-microphone far-field voice capture, noise cancellation, and advanced voice processing. The kit works with Home Assistant via ESPHome and supports voice assistants like Amazon Alexa and Google Assistant, making it suitable for smart voice assistant and home automation projects.

The XMOS XU316 AI sound chip is a multicore microcontroller with an advanced RISC architecture. It has 16 logical cores across 2 xCORE tiles, delivering up to 2400 MIPS and 1200 MFLOPS. It includes one MB single-cycle SRAM, USB 2.0 compliance, programmable I/O, and security features like an AES bootloader and programming lock, making it ideal for high-performance, real-time processing.

The kit combines the ReSpeaker Lite dual-microphone array with the XIAO ESP32S3 module, providing voice recognition, noise reduction, and processing. It supports WiFi, BLE 5.0, and includes a 2.4GHz rod antenna. It also offers I2S and USB connectivity for use with microcontrollers and SBCs, making it ideal for smart voice assistants and home automation.

Seeed Studio’s ReSpeaker Lite specification:

• Wireless Module: XIAO ESP32S3 processor
  • MCU: Espressif Systems ESP32-S3R8 dual-core Tensilica LX7 microcontroller @ 240 MHz, 512KB RAM, 8MB PSRAM
  • Storage: 8MB SPI flash
  • Wireless: 2.4 GHz WiFi 4 and Bluetooth 5,  Bluetooth mesh
  • Antenna: External 2.4GHz rod antenna
• Audio:
  • Controller: XMOS XU-316 AI sound and audio chip
    • Sampling Rate: 16KHz maximum
    • Automatic Speech Recognition Algorithms: Interference Cancellation, Acoustic Echo Cancellation, Noise Suppression, Voice-to-Noise Ratio (VNR), and Automatic Gain Control (AGC)
  • Microphone: 2x Digital PDM MEMS microphones
    • Sensitivity: -26 dBFS
    • Acoustic Overload Point: 120 dBL
    • SNR: 64 dBA
    • Far-Field Voice Capture: Up to 3m with Advanced noise-cancellation
  • Speaker: 5W Mono Enclosed Speaker with 4ohm±15% impedance
  • Audio Output: Speaker Connector and 3.5mm Headphone Jack
• USB: USB Type-C Port for power and data transmission.
• Interfaces: I2S and USB
• Miscellaneous:
  • Programmable WS2812 RGB LED provides visual feedback
  • Power LED and Mute LED
  • Buttons for User and Mute
• Power Supply: 5V via Type-C USB port or external 5V
• Dimensions: 95 x 92 x 42mm

The ReSpeaker Lite Series is open-source hardware compatible with Arduino, PlatformIO, MicroPython, and CircuitPython, allowing for further development. It supports popular voice assistants like Amazon Alexa, and Google Assistant, and integrates with Home Assistant via ESPHome. The kit enables building custom natural language processors and includes resources for various applications such as I2S Test, Streams Generator, CSV Converter, MP3 Player, Keyword Spotting, and MQTT Audio Streaming. Detailed guides are available to get started and build voice assistants with custom wake words on the wiki page.

In our previous post, we covered the Home Assistant Yellow board, a home automation hub using the Raspberry Pi Compute Module 4. It integrates Silicon Labs Zigbee and Matter for smart devices, includes NVMe SSD expansion, a GPIO options, and supports Power-over-Ethernet for flexible installation. We’ve also written about another ReSpeaker Core v2.0  smart assistance board. Feel free to check if you are interested in this product.

The Seeed Studio’s ReSpeaker Lite Voice Assistant Kit with black acrylic enclosure is now available for $33.91 on the Seeed Studio store, and you’ll find the ReSpeaker Lite board only for $24.90 and the ReSpeaker 2-mic Voice Assistant Kit for $29.91 in the same store.

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