LD2410 not detecting static if motion not detected

Hardware
1

Hi all

I’m using a LD2410C connected to an esp32 running esphome
I’m trying to configure the different thresholds and I noticed something weird

The sensor provides two binary sensors, one for movement detection and one for static detection.
I’ve notices that if the movement detection is not triggered, neither is the static detection.

Since I’m more interested in static detection, I lowered the threshold of one of the movement gates to 0. That way, the motion detection sensor is always on, and the static sensor works as I would expect.

I’m attaching two images from the bluetooth app -

photo1693419189
photo1693419189623×1280 92 KB

In the first image, you can see that the motion threshold is set to 100 in all gates - which means, no motion detection
you can also see that the static value is higher than the static threshold, and yet there is no static detection

photo1693418950 (1)
photo1693418950 (1)623×1280 80.5 KB

In the second image you can see that the motion threshold for gate 0 is set to 0 - which means motion detection is always true
you can see that the static value is higher than the static threshold, just like before, but now the static detection is true

Any ideas? Am I misunderstanding how this sensor works?

2

This has been my experience as well, but I can’t say I’ve explicitly tested it.

3

I believe this is by design. The presence output goes on when motion is detected and goes off when neither motion or static are detected.

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