4 Channel Pulse Output Voice Recognition Module

4 Channel Pulse Output Voice Recognition ModuleEngineers and hobbyists utilize this intelligent offline speech processing board to integrate localized, hands-free vocal control into embedded systems. Consequently, it decodes spoken command phrases entirely onboard using its dedicated ASR202S hardware engine without relying on external Wi-Fi networks or cloud infrastructure. Therefore, this module is an exceptional choice for zero-latency, privacy-focused automation tasks, smart toys, and appliance control systems where immediate physical response is required.

Key Features:

• Offline Processing Engine: Operates with complete independence from network connections, guaranteeing stable speech recognition regardless of internet availability.
• Integrated ASR202S Processor: Employs a specialized Reading Tech ASR202S high-efficiency voice chip for optimized command-matching algorithms.
• 4-Channel Pulse Output: Generates distinct hardware digital pulses across four independent channels upon verifying corresponding vocal triggers.
• Dedicated Acoustic Interface: Equipped with a pre-soldered miniature JST connector matching the included high-sensitivity electret microphone assembly.
• Compact Integration Footprint: Features a minimalist edge-pad configuration for easy integration into custom PCB assemblies or standard prototyping layouts.

Technical Specifications:

• Core SoC Architecture: ASR202S (Reading Tech).
• Operating Voltage: Compatible with standard 3.3 V to 5 V DC power supplies.
• Output Architecture: 4-channel digital status or pulse lines.
• Acoustic Input Source: External electret microphone capsule with a flexible twisted-pair extension wire.
• Recognition Reach: Built to capture localized user phrases effectively within standard indoor environments.

Mechanical Specifications:

• PCB Mask Color: Distinctive red mask featuring high-density surface-mount passive alignment components.
• Connector Layout: Includes a standard miniature horizontal JST socket labeled for microphone connection.
• Interface Array: Solder pads positioned cleanly on the lower board edge for streamlined manual wiring.

Dimensions:

• Board Length: ≈ 28.00 mm.
• Board Width: ≈ 17.00 mm.
• Weight: ≈ 4.00 g (Combined weight of the breakout board and microphone capsule).

Pinout and Wiring:

• VCC (+): Power input pad accepting regulated DC voltage (typically 3.3 V – 5 V).
• GND (-): Power supply and signal return path ground reference.
• Channels (1–4): Independent signal lines that deliver digital pulses when pre-programmed voice groups are parsed.
• MIC Port: Dedicated polarized input socket configured for bias and signal processing from the electret sensor.

Datasheet Reference: Download Datasheet

• ASR202S 4-Channel Offline Voice Recognition Module Technical Guide

Commonly Used in:

• Voice-Activated Switches: Directing multi-channel relay modules to flip home lights, fans, or heaters via basic voice prompts.
• Interactive Installations: Triggering customized lighting patterns or display mechanics inside museum exhibits and electronic art installations.
• Smart Toy Design: Providing animatronic assemblies or small robotic kits with responsive acoustic behavioral triggers.

Applications:

• Hands-Free Appliance Modification: Upgrading simple home appliances to execute mechanical adjustments without physical button interaction. However, high ambient room noise or loud machinery background sound can degrade command accuracy; therefore, engineers must intentionally mount the microphone away from immediate acoustic noise sources like motors.
• Assistive Accessibility Equipment: Fabricating simple, secure room alerts or environment controllers for individuals with limited manual dexterity.
• Industrial UI Overlays: Providing basic auxiliary command triggers for non-critical systems where an operator’s hands are fully occupied.

Equivalent Models:

• HLK-V20 Offline Voice Module: A widely available smart speech controller operating on comparable standalone logic.
• SU-03T Speech Recognition Module: A multi-pin offline voice processing alternative with configurable pin states.

Package Includes:

• 1 × 4 Channel Pulse Output Voice Recognition Module
• 1 × External Electret Microphone with Wire Assembly