Moresense MS24-2020D58M4-FMCW 24GHz Human Presence Sensor - FMCW Radar, 2-3M Range, UART Interface

This 24GHz FMCW radar detects micro-movements like breathing and heart rate variability by analyzing frequency shifts in the reflected signal, allowing it to sense stationary humans. Standard PIR sensors only detect gross motion through changes in infrared radiation, making them prone to missing static occupants.

The sensor provides data via a UART serial interface at 3.3V logic levels. Connect the module's TX/RX pins to a compatible serial port on your microcontroller (using a logic level converter if needed for 5V Arduinos). It streams packets containing target distance, radial speed, and presence status for parsing.

The 24GHz signal can penetrate thin, non-conductive materials like acrylic, glass, or drywall, but effectiveness diminishes with material thickness and density. It is designed for line-of-sight or through-barrier detection in applications like behind-ceiling-tile occupancy sensing, not for through-wall imaging.

The default sensing time is configurable (typically 2 seconds) via specific UART commands sent to the module. Refer to the manufacturer's communication protocol documentation for command sets to modify parameters like detection threshold, output delay, and reporting interval.

The module operates from a DC 5V to 12V supply. Under typical conditions with a 5V input, it draws approximately 62mA. Ensure your power source can provide stable voltage within this range and has adequate current capacity, especially if powering multiple sensors or other circuitry from the same supply.