I2C Presence Detector User Guide
User guide for the Acconeer I2C Presence Detector application, detailing the register-based interface for XM125 modules and A121 radar sensors.
Overview
This user guide describes the I2C Presence Detector application, which implements Acconeer's presence detection algorithms via a register-based I2C interface. The document covers system integration for the XM125 module and A121 sensor, including power-up sequences, low-power mode management, and GPIO signaling. It provides a detailed register map for configuring radar parameters such as detection range (in millimeters), frame rates, sensitivity thresholds, and filters. Additionally, it outlines the protocol for reading detector status, interpreting presence results, and executing commands like configuration application and module resets.
Use Cases
- Human presence detection
- Low-power occupancy sensing
- IoT motion sensing
- Industrial automation
- Embedded system radar integration