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This is a small 24GHz mmWave radar module built on the S3KM1110 SoC with a 1T1R antenna. Unlike a PIR sensor, it detects people who are standing still or barely moving, using FMCW radar and an onboard MCU running a human micro-motion algorithm. It talks over UART and also exposes a GPIO header, so it drops into Raspberry Pi, Pico, Jetson Nano, ESP32 and Arduino projects. It suits makers building presence-aware lighting, security or smart-home automations; rivals like the LD2410 and Seeed MR24HPC1 offer similar radar detection, but this one is a bare module with per-range sensitivity tuning rather than a finished product.
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Availability unknown
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Lowest price we've seen: $9.59 on Nov 14 at Amazon; highest $23.21 on Oct 31. Tracked across 2 stores since Oct 31.
This is a 24GHz mmWave radar sensor for detecting human presence. It uses Frequency Modulated Continuous Wave (FMCW) technology to detect and identify people who are moving, standing or motionless.
It is based on the S3KM1110 AIoT mmWave sensor SoC, with onboard 24GHz 1T1R antennas and an onboard MCU. A built-in human micro-motion sensing algorithm and radar signal processing handle detection and ranging. Sensitivity can be set independently for each range to improve resistance to interference.
The sensor is compact, uses little power and is easy to integrate. It suits AIoT uses such as smart home, intelligent security, smart business and intelligent lights. It communicates over a UART protocol, which lets you configure the sensing distance range, the sensitivity and the absence report delay. Output is available through the UART port and a GPIO header.