Description of Voice Recognition Module Gravity Offline Sensor Gravity: offline speech recognition sensor is built around an offline voice recognition chip, which can be directly used without an internet connection. It comes with 121 built-in fixed command words and supports the addition of 17 custom command words. Meanwhile, this voice recognition module compatibility with multiple common controllers enables it to provide a flexible solution for makers and electronics enthusiasts in terms of voice interaction. It can be applied to any application that requires voice control or interaction, such as various smart home appliances, toys, lighting fixtures, and robotics projects, among others. FEATURES: Self-learning function: Control the module to learn command words by the voice, and any audio can be trained as a command Support I2C and UART, with a Gravity interface Compatible with 3.3V/5V Built-in with 121 commonly-used fixed command words The module has a built-in speaker and an interface for an external speaker, which can provide real-time voice feedback on recognition results Equipped with power indicator (red) and recognition status indicator (blue) Dual microphones provide better noise resistance and longer recognition distance Compatible with Arduino controllers: Arduino UNO, Arduino Leonardo, Arduino MEGA, FireBeetle series controllers, Raspberry Pi, ESP32 APPLICATIONS: Voice recognition interaction Voice-controlled terminal Competition and project development SPECIFICATION: Operating Voltage: 3.3 - 5V Maximum Operating Current: ≤370 mA (5V) Communication: I2C/UART I2C Address: 0x64 Fixed Command: 121 Fixed Wake-up Command: 1 Custom Command: 17 Learning Activation Command: 1 Onboard Microphone Sensitivity: -28db Module Size: 49×32 mm/1.93×1.26” Operating Temperature: 0-70℃ Click here to know more about this product.