The Gravity Offline Voice Recognition Sensor is a compact, plug-and-play speech recognition board designed for local voice-controlled applications. 3.3V to 5.0V DC · I2C (Gravity 4-Pin) & UART Serial (Gravity 4-Pin).
The Gravity Offline Voice Recognition Sensor is a compact, plug-and-play speech recognition board designed for local voice-controlled applications. Operating completely offline without requiring Wi-Fi, cloud APIs, or external internet connection, it ensures zero latency, low power consumption, and enhanced privacy for embedded smart device control. Equipped with an onboard high-sensitivity microphone and processing engine, this module supports customizable voice command recognition and built-in speaker output for real-time acoustic feedback. It features dual communication interfaces—I2C and UART (Serial)—enabling seamless integration into various microcontrollers. Additionally, it features standard DFRobot Gravity 3-pin/4-pin connectors for quick, solderless prototyping. This sensor is ideal for voice-activated lighting, smart home appliances, touchless switch panels, interactive display systems, and service robotics. It is fully compatible with 3.3V and 5V microcontrollers including Arduino, ESP32, Raspberry Pi, PIC, AVR, and custom printed circuit boards (PCBs).
| Controller / Engine | DFRobot Gravity Offline Voice Recognition Board |
|---|---|
| Operating Voltage | 3.3V to 5.0V DC |
| Interface Options | I2C (Gravity 4-Pin) & UART Serial (Gravity 4-Pin) |
| Onboard Audio Hardware | Built-in microphone for input & speaker output connector for voice feedback |
| Offline Operation | Processing handled locally (No Wi-Fi, internet, or cloud API required) |
| Custom Command Support | Programmable command words and custom triggers |
| Status Indicators | Onboard power and status indicator LEDs |
| Plug-and-Play Connectors | Gravity standard 2.54mm interface headers |
What is the operating voltage?
3.3V to 5.0V DC.
Which interface does it use?
I2C (Gravity 4-Pin) & UART Serial (Gravity 4-Pin).
Is it compatible with Arduino and ESP32?
Yes. It works with Arduino, ESP32, Raspberry Pi projects.
Can I buy the Gravity Offline Voice Recognition Sensor in Kanpur?
Yes – buy online with delivery across India, or pick it up from the iTechBuilders store, Damodar Nagar, Kanpur.
