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Offline Voice Recognition Sensor for micro:bit, Arduino, ESP32 - I2C & UART

Offline Voice Recognition Sensor for micro:bit, Arduino, ESP32 - I2C & UART

₹1,829.00Price

🎤 Gravity: Offline Voice Recognition Sensor

🧩 Overview

  • Offline voice recognition module (no internet needed)

  • Compatible with micro:bit, Arduino, and ESP32

  • Supports both I2C and UART interfaces

  • Ideal for voice-controlled DIY projects

⚙️ Working Principle

  • Microphone captures voice input

  • Onboard processor analyzes and matches commands

  • Outputs digital signal or serial data to microcontroller

  • Works entirely offline, no cloud or internet required

📊 Key Specifications

  • 🔹 Voltage: 3.3V – 5V DC

  • 🔹 Current: ~20–40 mA

  • 🔹 Recognition Mode: Offline, supports multiple custom commands

  • 🔹 Interfaces: UART / I2C / GPIO

  • 🔹 Number of Commands: 7–80 (depends on module and training)

  • 🔹 Response Time: ~200ms (fast recognition)

  • 🔹 Signal Output: High/Low digital pin or serial communication

🧱 Module Components

  • MEMS microphone

  • DSP / Voice recognition chip

  • UART/I2C communication ports

  • Control & status LEDs

🔄 Features

  • Works offline – no internet needed

  • Customizable commands (trainable)

  • Low power, compact design

  • Supports multi-platform development

🛠️ Applications

  • Voice-controlled robots 🤖

  • Smart home devices 🏠

  • IoT voice-enabled projects 🌐

  • Hands-free automation

  • Educational STEM experiments

⚠️ Usage Tips

  • Use clean, noise-free environment for best accuracy

  • Ensure proper power supply (stable 3.3V–5V)

  • Train module for custom voice commands

  • Use short, distinct command words

✅ Advantages

  • Offline operation → no privacy concerns

  • Fast response (~200ms)

  • Easy integration with Arduino, micro:bit, ESP32

  • I2C & UART support → flexible connectivity

⚠️ Limitations

  • Recognition depends on voice clarity

  • Limited number of simultaneous commands

  • Background noise can affect accuracy

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