SONOFF SNZB-03P Zigbee Human Presence Sensor Instructions
- June 16, 2024
- SonOFF
Table of Contents
Pre-Use Instructions
SNZB-03P Zigbee Human Presence Sensor
SNZB-06P
Zigbee Human Presence Sensor
SNZB-06P emits 5.8GHz FMCW and CW radio waves into the detection area, and
processes the reflected radio waves from targets within the area through signal
conversion and algorithms. It can detect targets with fluctuations as low as
1mm or speeds as low as 3mm/s. Most human respiratory movements and minor body
motions have fluctuations greater than 1mm or speeds greater than 3mm/s,
allowing it to sensitively identify the presence of a human body.
Additionally, all moving objects can be detected, and if the vibration
frequency or harmonic frequency of an object, invisible to the human eye,
falls within the range of human respiratory frequencies, it may be observed by
the sensor, leading to false detection of “human presence.”
Due to its high sensitivity and limitations in detection principles, this
Instruction will list some common scenarios that may cause false detections.
When a false trigger occurs, the following measures can be taken for
optimization and debugging Inspect the environment, identify and eliminate
sources of interference, or adjust the device installation location away from
sources of interference. Extend detection duration • The indicator light
slowly flashes once, switches to low sensitivity, and the detection distance is
2.5m
• • The indicator light slowly flashes twice, switches to medium sensitivity,
and the detection distance is 3.5m
• • • The indicator light slowly flashes three times, switches to high
sensitivity, and the detection distance is 4m If there are several human
presence sensors, try to keep them away from each other. Pay attention to
align them in the same direction or opposite directions, avoid direct
irradiation between modules. Maintain a distance of at least 1.5m between
sensors. When the interference source cannot be eliminated, you can use it in
conjunction with a motion sensor to partially exclude non-biological
interference sources (such as fans, washers, robot vacuum, etc.). Example: “If
the motion sensor detects motion and the human presence sensor detects
presence, turn on the desk lamp.”