Ramping up an air purifier when 3D printing

By CLN Posted on 16/10/202101/12/2022 Category :

Setting a Philips air purifier AC3829 to turbo mode with home assistant when my 3D printer prints (a Prusa mini)

My Prusa mini printer is sitting in my home office, so when it’s printing for a longer job I can close the door to the office and lessen the noise.

Whilst discussions are going on online on “safe” 3D printing in the same room as you are sitting/working in, I already have an air purifier in my room, so might as well hook it up to start cleaning the air a bit faster when I’m printing.

I have an AC3829 air purifier in my office, it is controllable with 2 apps, Air Matters and Clean Home+

On this page

Home assistant requirements

Betaboon made a library to control these devices called aioairctrl and a forked home assitant component philips-airpurifier-coap to use this component you will need to have HACS installed on your homeassitant ( a community store )

Once HACS is up and running add the https://github.com/betaboon/philips-airpurifier-coap to HACS and install it

UPDATE 09/2022: it seems there is native support for the prusa now

For the Prusa Mini we will need another community component called Prusa Mini Integration for Home Assistant

Give homeassistant a quick reboot and those components should be ready to go.

Network requirements

I’ve also assigned reserved “fixed” IP’s on my DHCP server for the air purifier, and the prusa mini, so they stay on the same IP’s

Home Assistant configurations

I configured the 2 devices as such:

NOTE: I only care for the Prusa status, I’ve disabled the other options to reduce disk r/w due to logging

fan:
  platform: philips_airpurifier_coap
  host: 192.168.1.46
  model: ac3829

sensor:
  - platform: prusa_connect
    host: 192.168.1.52          # set printer ip
    name: Prusa Mini         
    scan_interval: 30         # set refresh interval (seconds)
    monitored_conditions:
    - status                # return printer state: printing, online, offline, cooling, heating
  #  - temp_nozzle           # return nozzle temperature
  #  - temp_bed              # return bed temperature
  #  - material              # return current loaded material
  #  - progress              # return printing progress 0-100
  #  - time_est              # return estimated time to complete (minutes)
  #  - project_name          # return printing job filename
  #  - pos_z_mm              # return z height in mm (floating point)
  #  - time_tts              # return time readable by google assistant

Validate the config and restart homeassistant

Creating the automation

When the Prusa is heating up the status will be “cooling”, when it’s printing the status will be “printing”

When done with printing it will be “cooling” again until cooled off, I’ve also added a delay of 30 minutes, meaning after printing the air purifier still works for half an hour to get the room odour-free.

I’ve attached the YAML for the 2 automation

- id: '1633969897389'
  alias: Ramp up air purifier with printer printing
  description: ''
  trigger:
  - platform: state
    entity_id: sensor.prusa_mini_status
    to: printing
  - platform: state
    entity_id: sensor.prusa_mini_status
    to: cooling
  condition: []
  action:
  - service: fan.set_preset_mode
    target:
      entity_id: fan.philips_airpurifier
    data:
      preset_mode: turbo
  mode: single

- id: '1633970083682'
  alias: Set air purifier to auto when printing is done
  description: ''
  trigger:
  - platform: state
    entity_id: sensor.prusa_mini_status
    from: printing
  condition: []
  action:
  - service: fan.set_preset_mode
    target:
      entity_id: fan.philips_airpurifier
    data:
      preset_mode: auto
  - delay:
      hours: 0
      minutes: 30
      seconds: 0
      milliseconds: 0
  mode: queued
  max: 10

For the first automation, we want to turn the purifier to turbo if our printer is cooling or printing.