Chain PIR (STM32G031)

Description

Chain PIR is a pyroelectric infrared human presence sensing node in the M5Stack Chain series. It features a built-in pyroelectric infrared sensor and an integrated programmable RGB LED. It is suitable for applications such as human activity detection, smart home automation, and security alarms.

Chain PIR integrates an STM32G031G8U6 data processor and uses a UART serial daisy-chain communication protocol. Its two HY2.0-4P expansion interfaces allow additional Chain series devices to be connected, enabling richer interactive applications.

Features

• M5Stack Chain series
• Pyroelectric infrared human presence sensing
• STM32G031G8U6 main controller
• UART serial daisy-chain communication protocol
• 1 x RGB LED
• 2 x HY2.0-4P expansion interfaces for connecting Chain series devices
• Two operating modes:
  • Automatic reporting mode: Automatically sends data to the host when the PIR status changes
  • Query mode: The host initiates a query, and the slave responds with the current PIR status

Includes

• 1 x Chain PIR
• 1 x Chain Bridge

Applications

• Human activity detection
• Smart home automation
• Security alarms

Specifications