The KeywaveKW307 is a compact 24GHz RF-based human presence and occupancy sensor designed for accurately tracing moving and stationary humans in indoor and outdoor (when inside an approriate IP-rated enclosure) applications.
Built upon a custom-designed sensing SoC and proprietary mathematical signal algorithms, the KW307 delivers real-time spatial coordinates (±5 cm distance, ±3° angle) and multi-target tracking for up to 3 individuals with ultra-low power consumption. It combines radar signal processing, target detection, and human presence intelligence inside a compact module, allowing you to add reliable spatial sensing without developing complex radar mathematics from scratch.
The sensor provides real-time target location information, including distanceand angle, allowing connected systems to respond more intelligently to where people are located. Its configurable sensing range, field of view and sensitivity make it suitable for home automation, lighting systems, HVAC control, appliances and other human-aware devices.
Its compact design, fast response and simple system integration help you develop smaller, cleaner and more intelligent projects - and the pre-soldered 2.54mm headers let you get started straight away using a breadboard for prototyping. Development resources are available on Github.
Is it mmWave?
No (but kind of yes as well!).
It's a 24GHz sensor, however mmWave is usually technically described as 30-300GHz, corresponding to wavelengths of 10mm down to 1mm. At 24 GHz, the wavelength is about 12.5 mm, so it falls just outside that definition.
However, in maker terms, this will be used in the same way - accurately detecting presence and occupancy - and the 24GHz radar is useful for home automation projects with up to 20m detection and a 100° FOV.
Key features
24GHz radar human-presence sensing
Detects moving and stationary people
Detection range up to 20 metres, depending on module configuration and environment
Tracks up to four targets simultaneously
Reports target distance and angle information
Typical 100° field of view, configurable up to 120°
Configurable range, sensitivity, gain and field of view
Fast, real-time occupancy and location reporting
Strong resistance to false triggers caused by fans, wind and vibration
UART interface for connection to an external MCU
Videos
Specifications
Absolute Maximum Ratings
Characteristic
Symbol
Min
Typ
Max
Unit
5V supply voltage
VDD5V
-0.3
5.0
5.5
V
Digital I/O voltage
VDIO
-0.3
3.3
3.6
V
Digital I/O maximum current capability
IDIO,max
10
mA
Ambient Temperature
TA
-25
85
°C
*GPO cannot directly drive a high-current load; it requires a power MOS switch to do so *It is recommended to add a 10µF decoupling capacitor to power input
DC Characteristics
Characteristic
Symbol
Min
Typ
Max
Unit
Supply voltage via 5V pin
VDD5V
3.6
5.0
5.5
V
Operation Current @ 20Hz update rate
IDC
4.0
mA
Operation Current @ 0.5Hz update rate
IDC
0.8
mA
RF Characteristics
Characteristic
Symbol
Min
Typ
Max
Unit
Operation frequency
FRF
24.05
24.25
GHz
RF output power
PRF
-2
dBm
Detection range
Range
0.1
10
20*
m
Field of View
FOV
100
degrees
*Horizontal alignment at 1m height *For detection requirements up to 20 meters, please contact Keywave representative
