Waveshare 26536 - Human Micro-Motion Detection MmWave Sensor S3KM1110 24GHz, FMCW Technology - HMMD-mmWave-Sensor The Human Micro-Motion Detection mmWave Sensor (S3KM1110) delivers reliable human presence detection using FMCW radar at 24 GHz. It combines on-board MCU and human micro-motion algorithms for accurate ranging and detection of moving, micro-motion, and stationary humans. Designed with UART and GPIO outputs, it’s ready for integration into AIoT projects, especially on Raspberry Pi, Arduino, ESP32, Pico, or Jetson Nano platforms. Features Based on AIoT mmWave Sensor SoC S3KM1110, onboard high-performance 24GHz 1T1R antennas Onboard MCU and built-in human micro-motion sensing algorithm for accurate detection of movements, micro-motion, and standing human Provides UART communication protocol, supports configuring sensing distance range, sensitivity, and absence report delay, easy to operate Supports UART port and GPIO header output, for connecting to host boards such as Raspberry Pi and Arduino Wide-range moving human body sensing distance, supports top-mounted and wall-mounted detection Comes with online resources and manual (examples for Raspberry Pi/RP2040/Arduino/ESP32/Jetson Nano) Specifications Hardware Frequency band 24~24.25GHz Bandwidth 0.25GHz Modulation FMCW Power supply 3.3V Output interface UART & GPIO UART baudrate 115200bps (default) Environment temperature -40~85℃ Dimension 20×20mm System Performance Detection range (wall-mounted) Moving human target: 10m; Micro-motion human target: 6m Detection range (top-mounted) Moving human target: 5m; Micro-motion human target: 4m Detection distance resolution 0.7m Detection angle ±60° Detection accuracy 0.15m (moving target within 10m radial distance from the radar) Average operation current 50mA Data refresh cycle 100ms Pinout  Compatible With Multiple Platforms Provides Demo And User Manual For Raspberry Pi / Raspberry Pi Pico / Jetson Nano / ESP32 / Arduino, Easier To Develop And Integrate, And Better Expansibility   Installation & Detection Range Wall-Mounted - Detection Range Diagram Outline Dimensions Resources Wiki: www.waveshare.com/wiki/HMMD_mmWave_Sensor