LD21410 + ceiling fan. How to exclude detection distance range

ESPHome
1

I have an LD2410 connected to an ESP32 in a room with a ceiling fan. I’m using the ld2410 to detect presence and from there manage lighting.

When the fan is running, detection_distance consistently hovers between 348-352.

Can anyone give me pointers to how I can configure the device in ESPHome such that any time the detection distance is between the two numbers, the has_target binary sensor reports as clear?

2

Answering my own question for anyone else looking for a solution. Occupancy is now based on state of binary_sensor.study_mmwave_fudged_presence:

uart:
  id: ld2410_uart
  tx_pin: GPIO1
  rx_pin: GPIO3
  baud_rate: 256000
  parity: NONE
  stop_bits: 1

ld2410:
  uart_id: ld2410_uart

binary_sensor:
  - platform: ld2410
    has_target:
      name: Presence
      id: presence
    has_moving_target:
      name: Moving Target
    has_still_target:
      name: Still Target
  - platform: template
    name: Fudged Presence
    lambda: !lambda |-
      if (id(presence).state && id(detection_distance).state >339 && id(detection_distance).state < 361) {
        return 0;
      } else {
        return id(presence).state;
      }

sensor:
  - platform: ld2410
    moving_distance:
      name : Moving Distance
    still_distance:
      name: Still Distance
    moving_energy:
      name: Move Energy
    still_energy:
      name: Still Energy
    detection_distance:
      name: Detection Distance
      id: detection_distance

number:
  - platform: ld2410
    timeout:
      name: timeout
    max_move_distance_gate:
      name: max move distance gate
    max_still_distance_gate:
      name: max still distance gate
1 Like
3

Hi, @whingingpom , glad to find your thread! Ive faced this problem all the time since the beginning i used this ld2410, and its quite hard to fine tuning my room with wall fan :disappointed_relieved:

Anyway can you please kindly teach me how you define the value inside you lamdba condition? Maybe a little decription about your noisy fan distance in your room will be help me to define mine.

Thanks!

4

Neat idea.
If you don’t mind, I’ve enhanced this exlusion feature by making the begin and end of the exclusion distance configurable.

Here is what you need to do to implement it:

Add the id values to the following existing entities:

number:
  - platform: ld2410
    timeout:
      name: "timeout"
      id: timeout

binary_sensor:
  - platform: ld2410
    has_target:
      name: "Presence"
      id: presence

sensor:
  - platform: ld2410
    detection_distance:
      name: "Distance Detection (cm)"
      id: detection_distance

Then add the following:

number:
  - platform: template
    name: Exclusion Begin
    id: ex_start
    min_value: 0
    max_value: 900
    mode: box
    device_class: distance
    entity_category: config
    unit_of_measurement: cm
    icon: mdi:arrow-right-bold
    step: 1
    optimistic: True
    initial_value: 0
    restore_value: True
  - platform: template
    name: Exclusion End
    id: ex_end
    min_value: 0
    max_value: 900
    mode: box
    device_class: distance
    entity_category: config
    unit_of_measurement: cm
    icon: mdi:arrow-left-bold
    step: 1
    optimistic: True
    initial_value: 0
    restore_value: True

binary_sensor:
  - platform: template
    name: Presence with Exclusion
    device_class: occupancy
    filters:
      - delayed_off: !lambda |-
          return id(timeout).state * 1000.0;
    lambda: !lambda |-
      if (id(presence).state && id(detection_distance).state >= id(ex_start).state && id(detection_distance).state <= id(ex_end).state) {
        return 0;
      } else {
        return id(presence).state;
      }
1 Like
5

@athua @whingingpom
Thanks for your implementation to exclude the ceiling fan. I just tried it and it worked for my room

If you don’t mind me asking:

  1. What’s the optimal location to position the sensor in a room? Before this I’ve only been using this in bathroom where it’s just mounted on the ceiling

  2. i haven’t really followed up with the other variants of ld2410. Is the ld2411s a better version with more antennas?