M5Stack CI1302 Voice Recognition Module

Description

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Description

Module ASR is an AI intelligent offline voice module designed based on the CI1302 chip. 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 5V@52.14mA Working: Low volume: DC 5V@43.38mA Medium volume: DC 5V@85.26mA High volume: DC 5V@161.34mA
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

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