mmWave Radar 24GHz Human Presence Detection Sensor (9m)
24GHz FMCW mmWave radar detecting human presence (both motion and stillness) up to 9m via serial (115200 baud) or I/O. Operates 3.6–5V at 90mA; 100×40° beam angle, -40 to 85°C range.
Pinout
- UART TxOfficial table 2 row 1
Sensor UART Transmiting
Type · UART - UART RxOfficial table 2 row 2
Sensor UART Receiving
Type · Power - GPIO1Official table 2 row 3
Universal Input and Output
Type · GPIO - GPIO2Official table 2 row 4
Universal Input and Output(By default, it outputs high when people presence detected, otherwise, output low)
Type · GPIO - GNDOfficial table 2 row 5
Ground
Type · Ground - VCCOfficial table 2 row 6
Power +
Type · Power - NCOfficial table 2 row 7
Reserved, left floating
Type · Control - NCOfficial table 2 row 8
Reserved, left floating
Type · Control
| Pin | Position | Type | Function |
|---|---|---|---|
| UART Tx | Official table 2 row 1 | UART | Sensor UART Transmiting |
| UART Rx | Official table 2 row 2 | Power | Sensor UART Receiving |
| GPIO1 | Official table 2 row 3 | GPIO | Universal Input and Output |
| GPIO2 | Official table 2 row 4 | GPIO | Universal Input and Output(By default, it outputs high when people presence detected, otherwise, output low) |
| GND | Official table 2 row 5 | Ground | Ground |
| VCC | Official table 2 row 6 | Power | Power + |
| NC | Official table 2 row 7 | Control | Reserved, left floating |
| NC | Official table 2 row 8 | Control | Reserved, left floating |
Pin details
8 connections- UART TxOfficial table 2 row 1
Sensor UART Transmiting
UART - UART RxOfficial table 2 row 2
Sensor UART Receiving
Power - GPIO1Official table 2 row 3
Universal Input and Output
GPIO - GPIO2Official table 2 row 4
Universal Input and Output(By default, it outputs high when people presence detected, otherwise, output low)
GPIO - GNDOfficial table 2 row 5
Ground
Ground - VCCOfficial table 2 row 6
Power +
Power - NCOfficial table 2 row 7
Reserved, left floating
Control - NCOfficial table 2 row 8
Reserved, left floating
Control
Start wiring
Analog · I2C · UART · 3.3 – 5 V · Breakout
Verify supply voltage and logic levels before powering up.
Module pins: UART Rx, VCC, GND, UART Tx. Schematik maps them to your board in the app.
Other sensors
62 other optionsPIR and mmWave presence sensors, Hall-effect and angle encoders, piezo vibration discs, gesture breakouts and more — grouped here because they fit nowhere else.
10K Precision Epoxy Thermistor 3950 NTC visual preview10K Precision Epoxy Thermistor 3950 NTC
$4.00
3D Gesture Sensor (Mini) for Arduino (I2C, 6 Gestures, 0~10cm) visual preview3D Gesture Sensor (Mini) for Arduino (I2C, 6 Gestures, 0~10cm)
4-Wire Slot Type Photoelectric Switch visual preview4-Wire Slot Type Photoelectric Switch
Adafruit AS5600 Magnetic Angle Sensor visual previewAdafruit AS5600 Magnetic Angle Sensor
$5.95
Adafruit STHS34PF80 IR Presence / Motion Sensor STEMMA QT visual previewAdafruit STHS34PF80 IR Presence / Motion Sensor STEMMA QT
$14.95
Bearables Bear Kit visual previewBearables Bear Kit
BOSON: Flame Sensor i7 visual previewBOSON: Flame Sensor i7
Boson: Sound Sensor i9 visual previewBoson: Sound Sensor i9
Breadboard-Friendly Mini PIR Motion Sensor with 3-Pin Header visual previewBreadboard-Friendly Mini PIR Motion Sensor with 3-Pin Header
C1001 60GHz mmWave Indoor Fall Detection Sensor (11 Meters) visual previewC1001 60GHz mmWave Indoor Fall Detection Sensor (11 Meters)
DFRobot DFR0051 Gravity Analog Voltage Divider V2 visual previewDFRobot DFR0051 Gravity Analog Voltage Divider V2
$3.70
Digital Magnetic Induction Sensor visual previewDigital Magnetic Induction Sensor
Related groups
4 groups
BOSON: Heart Rate Monitor Sensor i20 visual previewBiometrics
UART/I2C fingerprint modules, MAX30102 PPG breakouts, and analog ECG/EMG front-ends for access control and hobby biometric sensing.
Sensors · Biometric sensors · 26 parts
0.3M Pixel Serial JPEG Camera Module visual previewCameras
Pi CSI modules, USB cameras, MCU-class OV2640/OV5640 boards, on-camera AI like HuskyLens and OpenMV, and thermal or ToF imagers — over 130 listings across very different pipelines.
Sensors · Cameras & vision · 141 parts
0.28 Inch LED Digital DC Voltmeter - Green visual previewPower monitors
INA-series I2C monitors, Hall-effect sensors like the ACS723 and Gravity 20A/50A boards, and non-invasive CT clamps for everything from 3.3V rail telemetry to mains current sensing.
Sensors · Current & voltage · 25 parts
25m Long Distance ToF Laser Sensor (±3cm Accuracy, 100Hz, 100K LUX Resistant) visual previewDistance sensors
About 180 listings spanning VL53-series ToF breakouts, HC-SR04 and MaxSonar ultrasonics, 360° triangulation LiDARs, IR proximity sensors, 24GHz mmWave presence detection and laser break-beam sensors.
Sensors · Distance sensors · 177 parts