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 patterey Characteristics
Speaker-dependent works best with trained voice
Requires training before use
Recognizes short commands (12 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
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
ng>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
Speake
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