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mmWave Radar - Human Presence Detection
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This 24GHz millimeter-wave radar sensor employs FMCW, CW multi-mode modulation and separate transmitter & receiver antenna structure.
In working, the sensor first emits FMCW and CW radio waves to the sensing area. Next, the radio waves, reflected by all targets which are in moving, micro-moving or extremely weak moving state in the area, are converted into electrical signals by the millimeter-wave MMIC circuit in the sensor system. After that, these signals will be sent to the processor and processed through the related signal and data algorithms. Then, the target information can be solved.
The millimeter-wave radar can sense human presence as well as stationary and moving people within the detection area. Moreover, it can even detect static or stationary human presence such as a sleeping person.
There are two ways provided to output detection result: serial port and I/O port switch quantity. Besides that, the sensor module features strong sensing reliability, high sensitivity, small size and is easy to use or embedded in applications.
Connection Example
Features
- Human presence sensing: sense if there is human body in areas
- I/O port switch quantity input and output control
- Serial port input and output control
- Strong anti-interference ability, not to be affected by snow, haze, temperature, humidity, dust, light, noise etc
Specification
- Power Supply: 3.6~5V
- Operating Current: 90mA
- Detection Distance: 9m
- Equivalent Transmit Power: 13-15dBM
- Beam Angle: 100*40°
- Modulation Mode: FMCW, CW
- Operating Frequency: 24GHz
- Operating Temperature Range: -40~85℃
- Baud Rate: 9600
- Dimension: 24*28mm/0.94*1.10"
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- 1x mmWave Radar - Human Presence Detection
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Product Reviews
mmWave Radar - Human Presence Detection
Bought this sensor for my DYI burglar alarm. Unfortunately, the module produces too many false positives. Even after reconfiguring it for a very short detection range, it still generates 10+ false positives every hour, which is too much for my use case.
1 person found this review helpful.
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2 years ago
mmWave Radar - Human Presence Detection
It's a bit of a pickle to set up if you're new to all this - I wanted to use it with a D1 Mini and Home Assistant. I followed several written and video 'step by step' examples - that weren't - but managed to get there in the end and learnt a lot of new swear words and CL commands.
The device itself is well-made and responsive. The controls that come with the repo I used are very useful and great for tweaking e.g. sensitivity, range etc. but the availability of these will depend on your setup.
All said and done, most people (myself included), would be better off spending the money on several PIRs. Whilst it's nice to play with, and is a great product, it's so much more affordable, and practical, to use PIRs - at least for my general use cases.
2 people found this review helpful.
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2 years ago
mmWave Radar - Human Presence Detection
This board has a super sensitive sensor which is easy to configure when paired with ESPHome and thereby Home Assistant. Using the header minus a few pins it soldered on neatly to a Weimos D1 Mini, with only one wire outside the header. This made for a snug assembly that fitted in an old RPi enclosure. Software setup was a matter of copy and paste from the Everything Smart Home blog with all the tweaking done from the Home Assistant dashboard.
2 people found this review helpful.
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3 years ago
mmWave Radar - Human Presence Detection
Reviewer didn't leave any comments
2 people found this review helpful.
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4 years ago
mmWave Radar - Human Presence Detection
Not the cheapest, but it WORKS. I'm using this to control our kitchen lighting.
I tried with PIR sensors - if you stop moving, the lights turn off after the pre-set time!
Normal radar sensors false trigger in the middle of the night, and at least 50 times during the day.
This works! GPIO2 goes high when a human is present, moving or stationary, and low when you leave the area. Lots of configuration options. The GPIO is 3.3V logic, which wasn't mentioned anywhere. Powering it from 5V. Running for 3 weeks now with no false triggers or dropouts.
13 people found this review helpful.
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4 years ago
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