I installed the Red version of the presence switch. It’s installed in a bathroom and has the door on the left. If I walk by the doorway the presence sensor gets triggered and the bathroom light turns on. No matter what I set the parameters to for X-axis (103 and 104), the sensor is tripped just by walking by the doorway. I’ve attached a picture of what it looks like. You can see the switch facing the back of the bathroom with the door on the left. Just outside the bathroom is the walkway to the garage.
Perhaps I’m not understanding the parameters correctly. But my understanding is I’m basically setting the distance the sensor reads from left to right.
yes from left to right in this case if you are the sensor, and look out with your eyes your left is the door where you enter to the bathroom, and the right is the hand washer.
Yeah, that image is right above the chart that I posted from the documentation. That’s what makes it confusing. The documentation contradicts itself. Even the parameter info in Z-Wave JS shows that the possible values are -600 to 599.
The image and the description are correct. The switch is positioned at width 0 and you can set either the min/max to be between -600 and +600 cm. This allows you to set the detection area to either side of the switch or encompass both.
Stand with your back to the switch. Negative values are to the left, pos to the the right. If you set 103 to 300 and 104 to 301, you are saying that the left hand side of the box is 300cm to your right, and the right hand side of the box is 301 cm to your right. So you have 1cm between the left and right boundary.
If your door is 10cm to the left of the switch, you should set 103 to negative 10, or maybe a little less to avoid detecting the wall moving. Now, if your right wall is 50cm to the right, and you set 104 to 150 the sensor could pick up stuff on the other side of the wall, or even reflections of stuff in the hall. If you have a mirror to the right of the sensor, the metal coating for reflecting light also reflects mmw, so you would be getting a strong reflection out to the hall.
Just remember you are drawing lines out of the wall the switch is on from the point of view of the switch. Negative is to the left, positive to the right. Both lines can be to the left, or to the right of the switch, you just need the right line on the right of the left line. If you do 103 as -10 and 104 as -11 it will not work since you are saying the right side boundary is to the left of the left side boundary. But if you did 103 as -11 and 104 as -10 it would work. The left side being 11cm to the left of the switch, and the right being 10cm to the left of the switch still leaves the left and right boundaries on the correct sides of each other.
If you are still not sure, stand with your back to the switch and your arms out in front of you hands together. 103 is your left hand, 104 the right. If the number is negative, move that hand that many cm to the left, if it is positive, move that hand that many cm to the right. So long as they don’t cross, you are good.
