M5Stack ASR Module (CI1302)

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Equipped with a microphone for clear audio acquisition and a built-in speaker for high-quality audio feedback. It supports mid-session voice interruption, allowing for flexible interruption and quick response to new commands during recognition. Integrated AEC (Echo Cancellation) effectively removes echoes and noise interference, improving recognition accuracy. The product comes preloaded with 53 English wake-up and feedback command words and supports activating the device through UART commands or voice keyword triggers. Users can customize recognition words in Chinese, English, Japanese, and Korean by regenerating firmware, supporting up to 300 command words. The device communicates via a UART interface and allows switching between different UART pins through a DIP switch. It is ideal for AI assistants, smart homes, security monitoring, automotive systems, robotics & smart hardware, and healthcare applications — a perfect choice for intelligent voice interaction. Features Intelligent offline voice module AEC noise reduction processing Built-in 53 English commands; support up to 300 commands UART communication interface Support for custom wake-up words Firmware burning via reserved USB Type-C interface Equipped with microphone and built-in speaker Development Platform UiFlow2 Arduino Includes 1 x Module ASR Applications AI Assistant Smart Home Security Monitoring Vehicle System Robotics & Smart Hardware Healthcare Specifications Specification Parameter AI Voice Chip CI1302 Command Words Up to 300 commands supported; 53 preset commands from factory Wake-up Method Voice keyword or UART serial communication to activate device Microphone Analog microphone, model GMI4527P-2C-32db Speaker Chamber speaker 8Ω@0.8W (used for wake-up feedback output) Communication UART serial communication, default baud rate: 115200@8N1 Noise Reduction AEC echo cancellation noise reduction Wake-up Range Ambient noise 40dB: up to 6.4m Ambient noise 54dB: up to 1.8m Power Consumption Standby: DC [email protected] Working: Low volume: DC [email protected] Medium volume: DC [email protected] High volume: DC [email protected] Product Size 54.0 x 54.0 x 13.1mm Product Weight 15.2g Package Size 132.0 x 95.0 x 13.1mm Gross Weight 28.9g Learn and Documents → DOCUMENTS Show more