Product description: ASR - AI offline voice recognition module - CI-03T - Unit expansion module - M5Stack U194
The ASR Unit from M5Stack is an advanced offline speech recognition module designed for intelligent applications in robotics, home automation, and IoT systems. Equipped with the CI-03T , it offers speech recognition, voice detection, and voice user identification. It supports up to 300 commands , of which 42 phrases are pre-loaded. AEC technology effectively eliminates interference and echo , increasing accuracy. Thanks to the built-in microphone and speaker , the module allows both command reception and feedback.
ASR - AI offline voice recognition module - CI-03T - Unit expansion module - M5Stack U194.
The ASR unit has an intelligent offline voice module CI-03T .
Main features of the ASR Unit
- CI-03T module : intelligent offline speech recognition system
- Supports 300 commands : including 42 factory start phrases
- AEC : echo and noise cancellation for high recognition accuracy
- UART communication : fast and stable data transmission
- Built-in microphone and speaker : full voice support without additional components
- Flexible wake-up : via UART or keyword
- M5Stack Compatibility : Easy integration with Core, Atom and Stick series controllers
Pinouts and compatibility with M5Stack
The ASR unit uses a Grove connector with pins: GND, 5V, UART_RX, and UART_TX. It most commonly uses port C on M5Stack CoreS3 controllers, but it can also be connected to ports A and B after properly assigning pins in the software. The module works with the entire M5Stack ecosystem, including Core , Atom , and Stick .
The module uses UART serial communication .
Programming and integration
The ASR unit supports several popular development environments, making it easy to integrate with various projects. It can be programmed using the Arduino IDE as well as the UIFlow 1.0 and 2.0 block-based development environment. The module also supports the creation of custom firmware to support multilingual wake-up phrases. This gives the developer full control over defining custom commands and integrating voice into IoT systems, robotics, and smart devices.
Technical specifications of the module
- AI Module: CI-03T
- Voice commands: up to 300 (42 pre-installed)
- Wake-up method: UART or keyword
- Microphone: analog
- Speaker: 8 Ω / 1 W (feedback)
- Communication: UART (115200@8N1)
- Noise reduction: AEC (Acoustic Echo Cancellation)
- Supply voltage: 5 V
- Current consumption: from 47.7 mA (standby) to 250 mA (operation)
- Operating temperature range: 0°C to 40°C
- Dimensions: 48 x 24 x 16 mm
- Weight: 10.5 g
Contents of the set
- 1x M5Stack Unit ASR
- 1x Grove Cable (20cm)
The set includes a 20 cm Grove cable.
