Voice Recognition Module V3.1 Compatible with Arduino
🎤 Voice Recognition Module V3.1
Speech Control • Offline Recognition • Arduino Compatible
📌 What is this module?
The Voice Recognition Module V3.1 is a speaker-dependent speech recognition module that allows a microcontroller (like Arduino) to recognize voice commands and perform actions.
👉 It works offline (no internet needed)
👉 Commands must be trained by the user’s voice⚙️ Working Principle
User records (trains) voice commands into the module
Module stores these commands in memory
When the same voice is spoken:
Audio is captured via microphone
Compared with stored patterns
If matched → module sends signal to Arduino
âś” It uses pattern matching of sound signals, not AI/cloud processing
đź§ Key Characteristics
Speaker-dependent → works best with trained voice
Requires training before use
Recognizes short commands (1–2 words)
✨ Key Features
Supports up to 80 voice commands
Only 7 commands active at a time
Works with Arduino via UART (Serial communication)
Provides GPIO output for direct control
Includes microphone interface (3.5mm jack or onboard pins)
Arduino library available
🔌 Pin Configuration (Typical)
VCC → 5V
GND → Ground
TX → Arduino RX
RX → Arduino TX
GPIO pins → Direct control outputs
📊 Technical Specifications
Operating Voltage: 4.5V – 5.5V
Current Consumption: < 40 mA
Interface: UART (TTL serial) + GPIO
Recognition Time per Command: ~1500 ms
Accuracy: Up to ~99% (ideal conditions)
🔄 Control Modes
1. Serial Mode (Full Control)
Communicates via UART
Can:
Train commands
Load command groups
Read results
2. GPIO Mode (Simple Control)
Outputs HIGH/LOW signals
Directly controls LEDs, relays, etc.
đź§ Memory & Command Handling
Total storage: 80 commands
Active group: 7 commands at a time
Commands grouped into sets (libraries)
👉 You must load a group before recognition
🛠️ Applications
Voice-controlled home automation
Robotics control
Smart appliances
Voice-operated wheelchair
Security systems
DIY AI assistant projects
đź”— Arduino Interface
Connect via Serial communication (TX/RX)
Use library to:
Train commands
Detect recognized voice
Trigger actions
⚡ Advantages
Works offline (no internet required)
Easy integration with Arduino
Supports multiple commands
Low power consumption
Real-time response
⚠️ Limitations
Speaker-dependent (not universal voice recognition)
Limited to 7 active commands at once
Sensitive to:
Noise
Accent variation
Requires training for each user
đź’ˇ Important Notes
Works best in quiet environments
Keep commands short and distinct
Train multiple samples for better accuracy
Microphone quality affects performance
đź§ľ Summary
The Voice Recognition Module V3.1 is a compact and practical module that enables:
âś” Offline voice control
âś” Simple speech-command interaction
âś” Easy Arduino integration
👉 Ideal for beginner to intermediate projects involving voice-based automation.
