SU-03T Intelligent Offline Voice Control Module

SU-03T Intelligent Offline Voice Control Module is a highly integrated, low-cost solution that empowers smart devices with offline speech recognition capabilities, eliminating the need for cloud connectivity. Built around an ultra-low power consumption chip, this module performs high-accuracy voice commands recognition directly on the device, offering a robust and private user experience. Consequently, it enables rapid development and deployment of voice-activated features in battery-powered or resource-constrained products. The SU-03T supports customizable command words and ensures fast response times, enhancing device interactivity. Therefore, developers should choose this module when designing smart products that require reliable, instantaneous, and privacy-focused voice control without reliance on external networks.

Key Features:

• Offline Recognition: Performs voice command processing locally, guaranteeing fast recognition speed and complete user data privacy without needing Wi-Fi or Bluetooth.
• Ultra-Low Power Consumption: Designed for energy efficiency, making it ideal for battery-operated devices and long-term standby applications.
• High Recognition Rate: Achieves strong accuracy even in moderately noisy environments, ensuring reliable user interaction.
• Customizable Commands: Users can flash the module with application-specific voice commands, tailoring the functionality to the end product.
• Simple Interface: The module uses UART/GPIO interfaces, furthermore, simplifying integration with a wide range of host microcontrollers (MCUs).

Technical Specifications:

• Core Chip: Custom Ultra-low Power Voice Chip
• Supported Voice Commands: Up to 150 configurable commands
• Supply Voltage (V_CC): 3.0 V to 3.6 V (Typically 3.3 V)
• Standby Current: ≤ 10 μA
• Operating Current: ≈ 60 mA (During recognition)
• Communication Interface: UART (Serial Port) and GPIO
• Recognition Distance: Up to 3 meters (±1 m, depending on microphone setup)
• Operating Temperature Range: −20°C to +70°C

Mechanical Specifications:

• Package Type: Small, surface-mount type module (SMT/SMD)
• Microphone Requirement: Typically requires an external analog or digital microphone (not usually integrated on the basic module).
• Antenna: Onboard PCB antenna for wireless debugging/flashing (if applicable).
• Mounting: Solder pads designed for integration onto a main PCB.

Dimensions:

• Module Length: ≈ 14.5 mm
• Module Width: ≈ 13.5 mm
• Module Height: ≈ 2.5 mm (Excluding pin headers/connectors)
• Weight: < 1 g (Extremely lightweight)

Pinout and Wiring:

• VCC/VDD: Connect to the 3.3 V power supply.
• GND: Connect to the system ground.
• TXD/RXD (UART): Transmit and Receive pins connect to the host MCU’s UART port for command transmission and result reception.
• GPIOs: General purpose input/output pins, often used for status indicators, wake-up signals, or driving simple peripheral controls directly.
• MIC_P/MIC_N: Pins designated for connecting the external analog microphone or MEMS microphone interface.
• Pinout Note: Always connect the module’s VCC and GND with robust power decoupling to ensure clean voltage crucial for stable audio processing.

Datasheet Reference:

• Download SU-03T Intelligent Voice Module Reference Documentation

Commonly Used in:

• Smart Appliances: Integrating hands-free operation into kitchen devices, fans, air purifiers, and humidifiers.
• Toy and Entertainment: Embedding interactive voice control into smart toys and educational electronics.
• Lighting Control: Enabling simple voice-activated switching and mode changes for smart lighting systems.

Applications:

• Local Command Processing: Executing immediate, critical commands where latency is unacceptable (e.g., emergency stops or immediate mode changes).
• Wearable Tech: Providing voice input for devices where manual interaction is difficult or impossible.
• Security Systems: Serving as a simple, password-free voice trigger for arming or disarming systems.

Equivalent Models:

• V831 (Allwinner): A similar low-power voice control processor sometimes used in competitive modules.
• ESP32-S3 (Espressif): Although a full MCU, the S3 series offers native support for offline speech recognition, however, it generally consumes more power than the dedicated SU-03T.
• SYN6288: An older, less flexible voice synthesis and recognition chip sometimes used in simpler low-cost applications.

Package Includes:

• 1 x SU-03T Intelligent Offline Voice Control Module