LED Lighting

WallSense has sixteen RGB LEDs on the back and one RGB status LED in the front. You control the rear LEDs from Home Assistant. The front LED only gives touch feedback for now.

Note: This page describes the current firmware, a WiFi test build. Names and behavior can change until release.

Rear LEDs

The rear LEDs are off at every start. Three entities control them:

Entity	Type	What it does
`Rear LED Effects`	Light	Sets color, brightness and effect from Home Assistant
`Rear LED Effects Enabled`	Switch (config)	On starts Rainbow at 65 percent brightness, off turns the LEDs off
`Rear LED Scene`	Select (config)	Starts a scene at 35 percent brightness, or turns the LEDs off with `Off`

You can also control them with the touch surface, see Touch Control.

Rear LED Scene only shows the last choice made in that select. After a restart it shows Rainbow while the LEDs are off, and touch gestures or the Rear LED Effects light do not always update it.

Effects

Effect	What you see
Aurora Flow	A slow flow of teal, blue and violet
Rainbow	A rainbow that moves along the LEDs
Radar Sweep	A small group of LEDs that sweeps back and forth
Sparkle	LEDs that twinkle at random
Fireworks	Sparks in random colors that fade out
Color Wipe	LEDs that change color one after the other, in random colors
Breathing Blue	The light slowly fades in and out

Breathing Blue only changes the brightness and keeps the color the light is set to. In the current firmware it is only blue when you set the light to blue yourself, see Red When CO2 Is High for how to set a color.

Rear LED Effects offers these seven effects. Rear LED Scene offers the same seven plus Off.

Front LED

The front LED is internal in the current firmware. It only confirms touch gestures with a red pulse and is not a Home Assistant entity. It does not show network status either. Using it for your own status colors from Home Assistant is planned.

Automation Examples

The examples use wallsense as the device name. Entity IDs can differ per installation. Thresholds and times are examples.

Red When CO2 Is High

effect: "None" stops a running effect, so the color shows.

alias: "Rear LEDs red when CO2 is high"
triggers:
  - trigger: numeric_state
    entity_id: sensor.wallsense_scd41_co2
    above: 1000
    for:
      minutes: 5
actions:
  - action: light.turn_on
    target:
      entity_id: light.wallsense_rear_led_effects
    data:
      effect: "None"
      rgb_color: [255, 0, 0]
      brightness_pct: 30

alias: "Rear LEDs off when the air is good again"
triggers:
  - trigger: numeric_state
    entity_id: sensor.wallsense_scd41_co2
    below: 800
    for:
      minutes: 5
actions:
  - action: light.turn_off
    target:
      entity_id: light.wallsense_rear_led_effects

Doorbell Alert

alias: "Doorbell: Sparkle on the rear LEDs"
triggers:
  - trigger: state
    entity_id: binary_sensor.doorbell
    to: "on"
actions:
  - action: select.select_option
    target:
      entity_id: select.wallsense_rear_led_scene
    data:
      option: "Sparkle"
  - delay:
      seconds: 15
  - action: select.select_option
    target:
      entity_id: select.wallsense_rear_led_scene
    data:
      option: "Off"

Night Light

alias: "Hallway: night light on presence"
triggers:
  - trigger: state
    entity_id: binary_sensor.wallsense_occupancy
    to: "on"
conditions:
  - condition: time
    after: "22:00:00"
    before: "07:00:00"
actions:
  - action: light.turn_on
    target:
      entity_id: light.wallsense_rear_led_effects
    data:
      effect: "None"
      rgb_color: [255, 120, 40]
      brightness_pct: 10
  - wait_for_trigger:
      - trigger: state
        entity_id: binary_sensor.wallsense_occupancy
        to: "off"
        for:
          minutes: 2
  - action: light.turn_off
    target:
      entity_id: light.wallsense_rear_led_effects

Heat

LEDs that burn brightly for a long time give off some heat and can slightly affect temperature readings. Use the rear LEDs dimmed or briefly, and keep them off while you compare temperature. See Calibration.