Description
LD3320 Speech Recognition Module – Serial SPI Interface
Experience the next generation of intelligent voice interaction with the LD3320 Speech Recognition Module a compact and powerful board designed for accurate offline voice control Supporting both Serial UART and SPI communication this versatile module works seamlessly with 51 STM32 and Arduino microcontrollers
The LD3320 allows users to define and recognize up to 50 customizable Chinese voice commands enabling smart and intuitive voice operation for a variety of applications such as smart home control DIY robotics and automation projects
Equipped with built-in and external microphone support adjustable sensitivity and a TTL programming interface it offers makers educators and developers an easy entry point into the world of voice-enabled embedded systems
Whether you are building a smart light interactive robot or voice-activated appliance the LD3320 module brings your ideas to life without requiring an internet connection
Features
- Supports both SPI and Serial UART interfaces
- Fully compatible with 51 STM32 and Arduino platforms
- High recognition accuracy up to 85 percent within 1 meter
- Recognizes up to 50 programmable voice commands
- Offline operation no internet required
- Built-in and external microphone support
- TTL programming interface for configuration
- Compact design with efficient component layout
- Adjustable sensitivity for optimised performance
- Ideal for smart home DIY automation and education projects
Technical Specifications
| Parameter | Specification |
|---|---|
| Item Type | Speech Recognition Module |
| Model No | LD3320 |
| Interface Type | Serial UART and SPI |
| Operating Voltage | 33V to 5V DC |
| Recognition Accuracy | 85 percent within 1 meter |
| Maximum Commands | 50 voice commands |
| Microcontroller Support | 51 MCU STM32 Arduino |
| Programming Interface | TTL |
| Microphone Support | Built-in and external |
| Offline Recognition | Yes |
| Length mm | 60 |
| Width mm | 21 |
| Height mm | 10 |
| Operating Temperature | -20C to 70C |
Applications
| Use cases | Description |
|---|---|
| Smart Home Systems | Control lights fans and devices via voice commands |
| DIY Robotics | Build talking robots motion-activated toys and autonomous bots |
| Automation Projects | Voice-activated machinery and appliance control |
| Educational Use | Ideal for learning embedded speech recognition systems |
| IoT and Maker Projects | Great for prototypes that need intuitive voice interfaces |
Package Includes
1 LD3320 Speech Recognition Module
Note
This module supports offline speech recognition only no cloud or Wi-Fi required
Works best within 1 meter distance in low-noise environments