Add CO2 alert blueprint
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blueprint:
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name: CO₂ ventilation alert – Apollo R PRO-1 (LED + buzzer)
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description: >-
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Visual and audible CO₂ alerts on an Apollo R PRO-1.
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**LED**: off below the "ventilation recommended" level. From that level
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it turns yellow and fades towards red as CO₂ approaches the "ventilation
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needed" level; at or above it, it is solid red.
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**Buzzer**: at or above the "start beeping" level the beep action is
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repeated at the chosen interval, but only while CO₂ is NOT dropping.
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"Dropping" means the newest CO₂ reading is lower than the reading about
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one minute earlier (taken from a Statistics helper, see the
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"CO₂ change" input). Beeping stops as soon as CO₂ is falling, at any level.
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domain: automation
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input:
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co2_sensor:
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name: CO₂ sensor
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description: The R PRO-1 CO₂ sensor (ppm).
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selector:
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entity:
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filter:
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- domain: sensor
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device_class: carbon_dioxide
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change_sensor:
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name: CO₂ change over the last minute
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description: >-
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A Statistics helper based on the CO₂ sensor above. Settings: State
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characteristic = "Change", Max age = 1 minute (use 90 s if your
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sensor reports slower than every ~20 s). Its state is newest reading
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minus oldest reading in the window, so a negative value means CO₂ is
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dropping.
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selector:
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entity:
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filter:
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- domain: sensor
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led:
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name: R PRO-1 RGB LED
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description: The light entity of the R PRO-1 RGB LED.
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selector:
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entity:
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filter:
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- domain: light
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beep_action:
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name: Beep action
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description: >-
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Action(s) that make the R PRO-1 beep. Use the ESPHome action of your
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device, for example `esphome.<your_device>_play_buzzer` with data
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`song_str: "co2:d=8,o=6,b=180:c,p,c"`. Keep the tune short, it is
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repeated at the beep interval.
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default: []
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selector:
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action: {}
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recommended_level:
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name: Ventilation recommended (ppm)
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description: LED turns on (yellow) at this level.
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default: 1000
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selector:
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number:
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min: 400
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max: 5000
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step: 50
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unit_of_measurement: ppm
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mode: box
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needed_level:
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name: Ventilation needed (ppm)
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description: LED is fully red at this level.
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default: 1500
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selector:
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number:
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min: 400
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max: 5000
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step: 50
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unit_of_measurement: ppm
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mode: box
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beep_level:
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name: Start beeping (ppm)
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description: Beeping starts at this level (unless CO₂ is dropping).
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default: 2000
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selector:
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number:
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min: 400
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max: 10000
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step: 50
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unit_of_measurement: ppm
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mode: box
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min_drop:
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name: Minimum drop to count as "dropping" (ppm)
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description: >-
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0 = any decrease stops the beeping. Raise to 5–10 if sensor jitter
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makes the beeping stop and start at a plateau.
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default: 0
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selector:
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number:
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min: 0
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max: 100
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step: 1
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unit_of_measurement: ppm
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mode: box
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beep_interval:
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name: Beep repeat interval
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default: "/30"
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selector:
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select:
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options:
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- label: Every 10 seconds
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value: "/10"
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- label: Every 15 seconds
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value: "/15"
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- label: Every 20 seconds
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value: "/20"
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- label: Every 30 seconds
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value: "/30"
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brightness:
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name: LED brightness (%)
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default: 60
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selector:
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number:
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min: 1
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max: 100
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step: 1
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unit_of_measurement: "%"
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mode: slider
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led_off_when_ok:
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name: Turn LED off below "recommended"
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description: >-
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If enabled, the LED is switched off when CO₂ is below the
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recommended level. Disable if you use the LED for other things.
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default: true
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selector:
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boolean: {}
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mode: queued
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max: 10
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max_exceeded: silent
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variables:
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co2_sensor: !input co2_sensor
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change_sensor: !input change_sensor
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rec_level: !input recommended_level
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need_level: !input needed_level
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beep_level: !input beep_level
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min_drop: !input min_drop
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led_brightness: !input brightness
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led_off_when_ok: !input led_off_when_ok
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triggers:
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- trigger: state
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entity_id: !input co2_sensor
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id: reading
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- trigger: time_pattern
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seconds: !input beep_interval
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id: beep_tick
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actions:
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- variables:
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co2: "{{ states(co2_sensor) | float(none) }}"
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change: "{{ states(change_sensor) | float(0) }}"
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dropping: "{{ change < -(min_drop | float(0)) }}"
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span: "{{ [need_level - rec_level, 1] | max }}"
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frac: >-
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{{ ([[(co2 - rec_level) / span, 0] | max, 1] | min)
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if co2 is not none else 0 }}
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hue: "{{ (60 * (1 - frac)) | round(0) | int }}"
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- condition: template
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value_template: "{{ co2 is not none }}"
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- choose:
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# --- LED: update on every new CO2 reading -------------------------
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- conditions:
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- condition: trigger
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id: reading
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sequence:
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- choose:
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- conditions:
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- condition: template
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value_template: "{{ co2 >= rec_level }}"
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sequence:
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- action: light.turn_on
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target:
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entity_id: !input led
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data:
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hs_color: "{{ [hue, 100] }}"
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brightness_pct: "{{ led_brightness | int }}"
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- conditions:
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- condition: template
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value_template: "{{ led_off_when_ok }}"
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sequence:
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- action: light.turn_off
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target:
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entity_id: !input led
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# --- Buzzer: repeat while high AND not dropping -------------------
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- conditions:
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- condition: trigger
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id: beep_tick
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- condition: template
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value_template: "{{ co2 >= beep_level and not dropping }}"
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sequence: !input beep_action
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