Infostripe

Showing the current status of sensor states using a Neopixel (WS2812B) strip is a simple way to communicate states to the user. Compared to a dashboard screen the infostrip can only communicate the information like a binary sensor.

color (e.g., red = error/warning, orange = warning, green = ok, blue = active)
intensity (off, scaled brightness)
mode (continuous vs. flashing, flashing or strobe is not recommend)
light position on stripe

Wemos D1 mini, Neopixel, CO2 sensor on a blackboard, pixelmeanings are described by the chalk drawn icons.

ESPHome configuration

uart:
  rx_pin: GPIOXX
  tx_pin: GPIOXX
  baud_rate: 9600

sensor:
  - platform: mhz19
    co2:
      name: "MH-Z19 CO2 Value"
    temperature:
      name: "MH-Z19 Temperature"
    update_interval: 30s

# Monitor the Wifi connection status
binary_sensor:
  - platform: status
    name: "Infostrip Status"

# Configure each pixel as a single light (attention memory consuming)
light:
  - platform: fastled_clockless
    chipset: WS2812B
    id: light_fastled
    pin: GPIOXX
    num_leds: 4
    rgb_order: GRB
    name: "Infostrip"
    effects:
      - strobe:
      - random:
  - platform: partition
    name: "PL0"
    segments:
      - id: light_fastled
          from: 0
          to: 0
    effects:
      - strobe:
  - platform: partition
    name: "PL1"
    segments:
      - id: light_fastled
          from: 1
          to: 1
    effects:
      - strobe:
  - platform: partition
    name: "PL2"
    segments:
      - id: light_fastled
          from: 2
          to: 2
    effects:
      - strobe:
  - platform: partition
    name: "PL3"
    segments:
      - id: light_fastled
          from: 3
          to: 3
    effects:
      - strobe:

WARNING

Consider the warning in Partition regarging the increased memory usage.

Home Assistant configuration

The automation to show the CO2 warning light (e.g. red if CO2 > 1000 ppm) is done in Home Assistant, but could also be implemented using ESPHome Automations.

# Turn on a light with the related color
automation:
- id: '1601241280015'
  alias: Light CO2 On
  description: ''
  trigger:
    - platform: numeric_state
      entity_id: sensor.mh_z19_co2_value
      above: 1000
  condition: []
  action:
    - action: light.turn_on
      data:
      color_name: red
      entity_id: light.pl2
  mode: single
- id: '1601241280016'
  alias: Light CO2 Off
  description: ''
  trigger:
    - platform: numeric_state
      entity_id: sensor.mh_z19_co2_value
      below: 800
  condition: []
  action:
    - action: light.turn_off
      entity_id: light.pl2
      mode: single
- alias: "State Light Mapping"
  trigger:
  platform: time_pattern
  # You can also match on interval. This will match every 5 minutes
  minutes: "/5"
  action:
    - action: light.turn_on
      data_template:
      entity_id: light.pl1
      brightness_pct: 30
      color_name: >
          {% set map = {'on': 'green', 'off': 'red'} %}
          {% set state = states('binary_sensor.bad_status') %}
          {{ map[state] if state in map else 'white' }}

Infostripe

ESPHome configuration

Home Assistant configuration

See Also