This custom integration will allow your Home assistant to control:

• fan speed
• target heater temp
• heater mode (on/off)
• some presets:
  • boost
  • away

of your Tion S3/S4/Lite breezer via bluetooth. If you are prefer control breezer via Magic Air, please follow to https://github.com/airens/tion_home_assistant repository.

⚠️ Please remember that breezer is not heating device and don't try use it for room heating ⚠️

1. BTLE supported host with Home Assistant
2. Tion S3, S4 or Lite breezer

1. goto HACS->Integrations->three dot at upper-right conner->Custom repositories;
2. add TionAPI/HA-tion to ADD CUSTOM REPOSITORY field and select Integration in CATEGORY;
3. click "add" button;
4. find "Tion breezer" integration;
5. click "Install". Home assistant restart may be required;

1. go to Integrations page;
2. click "plus" button;
3. type "Tion" in search field;
4. click on "Tion breezer integration";
5. fill fields;
6. click "Next" and follow instructions;
7. restart Home Assistant.

Repeat this steps for every device that you are going to use with home assistant.

• calling climate.set_hvac_mode. Mode:
  • off will turn off breezer;
  • fan_only will turn brezzer on with turned off heater
  • heat will turn breezer on with tunrned on heater fan speed will not be changed.
• calling climate.set_fan_mode.
  • 0 will turn off breezer;
  • 1..6 will turn breezer on. No state (heater/fan_only) will be changed.
• you may use climate.turn_on and climate.turn_off services. climate.turn_on will turn on breezer into the state it was before being turned off.

automations.yaml:

- id: 'tion1'
  alias: 1 speed for tion by co2 < 500
  trigger:
  - platform: numeric_state
    entity_id: sensor.mhz19_co2
    below: '500'    
    for: 00:05:00    
  condition:
  - condition: not
    conditions:
    - condition: state
      entity_id: climate.tion_breezer
      state: 'off'
  action:
  - service: climate.set_fan_mode
    entity_id: climate.tion_breezer
    data:
      fan_mode: 1    
    
- id: 'tion4'
  alias: 4 speed for tion with co2 > 600
  trigger:
  - platform: numeric_state
    entity_id: sensor.mhz19_co2
    above: '600'    
    for: 00:05:00    
  condition:
  - condition: time     #don't turn on fan at speed 4 from 22:00 to 08:00 
    after: '08:00:00'
    before: '22:00:00'    
  - condition: not
    conditions:
    - condition: state
      entity_id: climate.tion_breezer
      state: 'off'
  action:
  - service: climate.set_fan_mode
    entity_id: climate.tion_breezer
    data:
      fan_mode: 4  

Feel free to open issues.
Please attach debug log to issue.
For turning on debug log level you may use following logger settings in configuration.yaml:

logger:
  default: warning
  logs:
    custom_components.ha_tion_btle: debug
    tion_btle.tion: debug
    tion_btle.s3: debug    
    tion_btle.lite: debug
    tion_btle.s4: debug
    custom_components.ha_tion_btle.config_flow: debug