DFRobot (SEN0539-EN) Voice Recognition Module, Gravity, 3.3 V to 5 V

SEN0539-EN is a Gravity: offline language learning voice recognition sensor module for micro:bit / Arduino / ESP32 - I2C & UART. It is ideal for human-computer interaction, machine learning, voice assistants, and smart home voice control projects. It is easy to use and compatible with Arduino, micro:bit, and ESP32, with detailed tutorials provided. It offers plug-and-play functionality through I2C and UART. The module features 121 built-in command words commonly used in education and smart home settings and supports 17 customized commands (e.g., recording a cat's meow for an automatic feeder). The module is highly integrated, including an onboard speaker and microphone, providing real-time voice feedback. Suitable for voice recognition interaction, voice-controlled terminal, competition and project development.

• 121 pre-programmed commands: ready for immediate use without any setup
• Self-learning capability: supports the addition of 17 customized command words
• Offline operation, enhanced privacy: no network required
• High integration: includes an onboard speaker and microphone
• Instant voice feedback: provides real-time recognition results
• 3.3 to 5V operating voltage, maximum operating current is less than equal to 370mA (5V)
• 0x64 I2C address
• Onboard microphone sensitivity is -28dB
• Module size is 49x32mm/1.93 x1.26"
• Operating temperature range from 0-70 C

Contents

Gravity: voice recognition module - I2C & UART (V1.1), Gravity-4P I2C/UART sensor connector.

What's in the box
1 x Voice Recognition Module