M5Stack ASR Voice Module CI1302

The ASR Voice Module from M5Stack is an AI-powered offline voice recognition module based on the powerful CI1302 chip. The module features a built-in microphone for clear audio recording and an integrated speaker for high-quality voice output. It supports voice interruption during recognition, enabling flexible interaction and quick response to new commands. The CI1302 chip integrates a high-performance neural network processor that supports deep learning-based noise reduction and echo cancellation. The offline functionality means that no internet connection is required for voice recognition, enhancing privacy and reliability. The module communicates via UART and can be activated both via serial commands and voice wake words. Users can configure custom wake words and commands in different languages via the Smart Pi platform. The module is ideal for AI assistants, smart home control, security systems, and robotics applications.

Recommended Accessories:

• M5Stack CoreS3 ESP32S3 IoT Development Kit
• M5Stack Core2 V1.1 ESP32 IoT Development Kit

Features:

• CI1302 chip with neural network processor enables precise offline voice recognition.
• Integrated microphone and speaker provide complete audio input and output.
• Deep learning-based noise reduction and echo cancellation enhance recognition accuracy.
• Voice interruption during recognition allows natural interaction.
• Customizable wake words and up to 300 command words configurable via Smart Pi platform.
• UART communication enables easy integration into existing projects.

Application Examples:

• Voice-controlled smart home devices like lamps and sockets
• AI assistants for local voice commands without cloud dependency
• Voice control for robots and autonomous systems
• Access control with voice recognition and voice print
• Interactive learning toys and educational applications

Documentation:

• M5stack Wiki
• Official M5Stack Forum

Technical Specifications:

• Manufacturer: M5Stack
• Manufacturer SKU: M147
• Main Chip: CI1302
• Processor: High-performance neural network processor
• Functions: Voice recognition, voice print recognition, voice enhancement, voice activity detection
• Audio Input: Integrated microphone
• Audio Output: Integrated speaker
• Communication: UART
• Voice Interruption: Supported
• Noise Reduction: Deep learning-based
• Echo Cancellation: AEC (Acoustic Echo Cancellation)
• Customizable Commands: Up to 300 command words
• Operating Temperature: 0°C to 40°C
• Package Dimensions: 140 × 105 × 26 mm
• Gross Weight: 30 g

Package Contents:

• 1× ASR Voice Module CI1302