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
✔ It uses pattern matching of sound signals, not AI/cloud processing
🧠 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.
🧠 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
🔗 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
💡 Important Notes
Works best in quiet environments
Keep commands short and distinct
Train multiple samples for better accuracy
Microphone quality affects performance
🧾 Summary
The Voice Recognition Module V3.1 is a compact and practical module that enables:
✔ Offline voice control
✔ Simple speech-command interaction
✔ Easy Arduino integration
👉 Ideal for beginner to intermediate projects involving voice-based automation.