Key Technical Advantages
A. Advanced Audio Processing
WM8960 Stereo Codec: Optimized for low power consumption without sacrificing high-fidelity audio conversion.
Dual Microphone Array: Two high-sensitivity microphones positioned on either side of the board for balanced far-field voice capture and noise isolation.
Superior Sample Rate: Supports up to 48kHz sampling, ensuring high-quality audio recording and playback for professional applications.
B. Rich Peripheral Ecosystem
Visual & Tactile Interaction: Features 3 programmable APA102 RGB LEDs and a dedicated User Button (GPIO17) for intuitive UI feedback.
Grove Expandability: Integrated Grove I2C and Grove Digital (GPIO12/13) ports, allowing for seamless connection to the vast ecosystem of Grove sensors and displays.
Dual Output Options: Choose between the standard 3.5mm Audio Jack or the JST 2.0 Speaker Connector (supporting 5W amplification) for versatile audio output.
Core Hardware Specifications
| Component | Specification | Functionality |
| Audio Codec | WM8960 | Low-power stereo DAC/ADC and Signal Processing. |
| Microphones | Dual Analog Mics | Positioned for stereo/differential sound capture. |
| Max Sample Rate | 48 kHz | Professional-grade digital audio processing. |
| LEDs | 3x APA102 RGB | Connected via SPI for low-latency visual effects. |
| Connectors | 40-pin GPIO / Grove / JST 2.0 | Compatible with Raspberry Pi 4, 3B+, 3A+, Zero, etc. |
| Power Input | Micro USB (5V) | Ensures stable current for driving external speakers. |
Advanced AI Integration & Edge Solutions
I. Edge Voice Recognition with Picovoice
SISTC has partnered with Picovoice to provide an end-to-end, privacy-first voice AI solution.
100% On-Device: No cloud connection required.
Zero Latency: Eliminates network delays for instant response.
Privacy & Compliance: Fully compliant with HIPAA and GDPR as all data stays local.
Robust Performance: Exceptional resistance to noise and reverberation.
II. Open-Source Keyword Detection with Mycroft Precise
For developers seeking full control, the HAT-2M-WM8960 supports Mycroft Precise, an Apache-2.0 licensed keyword detector.
Custom Training: Train the system to recognize specific names, sounds, or events.
Cross-SBC Support: While optimized for Raspberry Pi (Raspbian), it is compatible with Nvidia Jetson Nano, NPi i.MX6ULL, and ODYSSEY-STM32MP157C.
Applications
Smart Home Hubs: Building custom, privacy-centric voice controllers for home automation.
AI Personal Assistants: Integrated Alexa or Google Assistant for desktop or embedded use.
Edge Audio Analytics: Sound classification and acoustic monitoring in industrial environments.
Interactive HMI: Voice-driven interfaces for kiosks and robotics.
Support & Resources
To maintain the highest level of technical support and ensure your project’s success, we provide complete configuration scripts, driver packages, and sample code upon request.
How to get started:
Please contact our customer service team or visit www.sistc.com to request the HAT-2M-WM8960 Technical Resource Package.
Quality Commitment
At SISTC, we leverage 15 years of expertise in acoustic engineering. Our boards are manufactured to industrial standards, ensuring high SNR (Signal-to-Noise Ratio) and consistent performance across all supported Linux platforms.
