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The HMMD-mmWave-Sensor is a compact 24GHz FMCW radar module built on the S3KM1110 AIoT sensor SoC with 1T1R antennas. An onboard MCU runs a human micro-motion algorithm, so it detects people who are moving, barely moving, or standing still, not just bodies in motion. You tune sensing distance, sensitivity, and absence report delay over UART, and read presence from a GPIO header into a Raspberry Pi, RP2040, ESP32, or Jetson Nano. It suits makers building presence-aware lighting, security, and automation without cameras or wearables; against passive infrared sensors it holds presence when a person is still, but it is a bare module that needs a host and configuration, not a finished detector.
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Lowest price we've seen: $6.99 on Nov 14 at Amazon; highest $45.95 on Oct 31. Tracked across 2 stores since Oct 31.
The HMMD-mmWave-Sensor is a compact 24GHz FMCW radar module that detects moving, micro-motion, and standing humans. It is based on the AIoT mmWave Sensor SoC S3KM1110 with 24GHz 1T1R antennas. An onboard MCU runs a built-in human micro-motion sensing algorithm.
The module has a UART port and a GPIO header output for connecting to host boards such as Raspberry Pi, RP2040, ESP32, and Jetson Nano. Over UART, you can configure the sensing distance range, sensitivity, and absence report delay. It can be mounted on a wall or on the ceiling, and it senses moving people over a wide range.
It adds presence sensing without wearables or cameras. Typical uses include smart home, security, business, and lighting control.