M5Stack Chain MIC Sound Acquisition Node STM32 Control 12-Bit ADC Microphone Input Node with UART Interface

Introduction:
- Chain MIC is a sound acquisition node in the M5Stack Chain series. It features a built-in GMI4015P-2C microphone, an SGM321YC5/TR operational amplifier, and a programmable RGB LED. It supports 12-bit ADC sampling of sound signals and threshold triggering, making it suitable for applications such as environmental sound detection, voice-controlled interaction, and device status indication. It integrates an STM32G031G8U6 main controller and uses a UART serial daisy-chain communication protocol. Its two HY2.0-4P expansion interfaces allow more Chain series devices to be connected, enabling richer sound sensing and interactive applications.

Features:
- M5Stack Chain series
- GMI4015P-2C microphone sound acquisition
- Supports 12-bit ADC sampling of sound signals and threshold triggering
- STM32G031G8U6 main controller
- 1 x RGB LED
- UART serial daisy-chain communication protocol
- 2 x HY2.0-4P expansion interfaces for connecting Chain series devices

Applications:
- Environmental sound detection
- Sound threshold triggering
- Voice-controlled interactive devices
- Smart home sound sensing

Specifications:
- MCU: STM32G031G8U6
- Power input: DC 5V
- Communication: UART 115200bps at 8N1
- Interface: 2 x HY2.0-4P
- Microphone: GMI4015P-2C
- Operational amplifier: SGM321YC5/TR
- RGB LED: 1 x WS2812C-2020
- Sound Signal: 12-bit ADC sampled value, threshold trigger status
- Operating power consumption: 5V at 35.54mA (MIC active, white LED always on)
- Product size: 24.0 x 24.0 x 16.0mm
- Product weight: 5.7g

Package Included:
- 1 x Chain Mic
- 1 x Chain Bridge