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There are two main types of motion detection sensors available, microwave and PIR (Passive Infrared) and we’re here to take a quick look at the pros and cons of each.
Microwave sensors are active devices that detect movement using a principle known as the ‘Doppler Effect’. Once installed, microwave sensors continuously emit low-level microwave signals across a designated space or ‘detection area’.
Microwave detection is a newer and more advanced occupancy sensor than the PIR– it works by emitting high-frequency electromagnetic waves and then receiving.
- Technical Characteristics Comparison
- Testing Setup
- Test A: Presence Detection Speed
- Test B: Presence Clearance Speed
- False Positives
- False Negatives
- Zigbee Communication
- Summary
All three devices come in ZigBee variant, but only the Tuya devices are capable of acting as a router in a mesh network. They can all be powered with a 5V1A adapter, but the FP1 is the only one that ships with an adapter in the package. Their angle and detectionrange are spec’d quite differently, but this does not translate exactly as stated. All t...
To test and compare the operation of these sensors, I decided to mount them at eye-height overlooking a wide room and measure their response in Home Assistant. They are all USB powered, paired to ZigBee2MQTT + Sonoff ZBDongle-P with signal quality of 255 LQI. I left them in this position 2 days before actually testing, to ensure their communication...
In the first test, I measured the detection speed reported of each of the sensors in Home Assistant. Their main binary_sensor.presenceentities were added to a dashboard and measured with a timer. Some users asked for the sensor.presence_event entity of the Aqara FP1to be measured as well, because it reports faster than its main binary_sensor entity...
In this second test, I measured the presence clearance speed of each device. Their settings remained the same, maximum sensitivity and range for the ZY-M100 and maximum approach distance and sensitivity for the FP1. YouTube Direct Link: https://www.youtube.com/watch?v=6HrqMYV_NHM 1. First entity:Aqara FP1 presence_event 2. Second entity:Tuya ZY-M10...
False positives are really difficult to overcome with an mmWave sensor while maintaining reliable human presence detection. If you crank up the sensitivity to maximum, the sensor can get triggered by stupid stuff you would not anticipate. For example, when doing my tests, I got a few false positives in all three sensors: 1. Motion in my front yard ...
False negatives are another issue users encounter with mmWave sensors. After all, this is a presence sensor, so the lights need to stay on while I’m on the couch watching TV. I tested the three devices in a couple of situations: 1. Watching TV in recliner – 3 meters distance from sensors 1.1. No false negatives 2. Lying in bed – 4 meters distance f...
Each of the three devices I tested are ZigBee based. Even though the Tuya mmWave sensors are available in Wi-Fi variants and their hardware is the same, I recommend you stay from them as they are cloud dependent. As far as ZigBee stability goes, each of them operates without issues in a well founded ZigBee mesh network. Neither fell of the network ...
These three mmWave human presence sensors bring a new aspect to motion detection. The drawbacks of traditional PIR motion sensors are somewhat eliminated and I expect them to become fully obsolete in the near future as mmWave tech takes over as the main motion detection sensor. So, which of these should you pickup and try out if you haven’t already...
- ZigBee
- 52x45x36mm
- EndDevice
- 60GHz mmWave Radar
Aug 13, 2024 · In this comprehensive guide, we’ll walk you through everything you need to know about how to control a ceiling fan with a remote. These remotes use infrared light to communicate with the fan, so they require a clear line of sight between the remote and the fan.
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