The Gravity voice recognition module for Arduino - I2C & UART by DFRobot is an offline voice recognition module that can be used without an internet connection. With 121 built-in command words and the ability to add 17 custom commands, it offers great flexibility for interactive audio projects. The module features a dual microphone for improved noise reduction and greater recognition distance, enabling accurate and reliable performance even in noisy environments. It supports both I2C and UART communication methods and is compatible with various 3.3V or 5V controllers such as Arduino, Raspberry Pi, and others. The Gravity speech recognition module is ideal for electronics enthusiasts who want to create smart home appliances, toys, lamps, and robotics projects with integrated speech recognition.

Features:

• Self-learning function: control the module to learn command words by voice, and any audio can be used as a command.
• I2C and UART, with a Gravity interface.
• The module has a built-in speaker and an interface for an external speaker that can provide real-time voice feedback on the recognition results.
• Equipped with a power indicator (red) and a recognition status indicator (blue).
• Two microphones provide better noise reduction and a wider recognition range.
• Compatible with Arduino controllers: Arduino UNO, Arduino Leonardo, Arduino MEGA, FireBeetle series controller, Raspberry Pi, ESP32.

Technical details:

• Manufacturer: DFRobot
• Manufacturer's SKU: SEN0539-EN
• Operating voltage: 3.3 to 5V
• Maximum operating current: ≤370 mA (5V)
• Communication interfaces: I2C/UART
• I2C address: 0x64
• Number of fixed commands: 121
• Fixed wake-up command: 1
• Number of user-defined commands: 17
• Learning activation command: 1
• Sensitivity of the integrated microphone: ~28db
• Dimensions: 49 x 32 x 8mm
• Weight: 25g

Scope of delivery:

• 1 Gravity voice recognition module with I2C and UART.
• 1 Gravity-4P I2C/UART sensor cable (30cm).