Entire project for multi area/zone heating, cooling, open window control

Hello everyone.
Lately I have managed to connect an esp to an OT shield from https://diyless.com/ / http://ihormelnyk.com/opentherm_adapter .
Because of this, I decided to concentrate some of my time to trying to make a smarter than your average hvac system. After finishing, this will be moved probably to projects section.
My heating project looks like this at the moment:

I can control my boiler now based on the temperature from a sensor in my house. Any of them, but only one at a time.
What I want to do is, a lot more complicated. I want to have control over the temperature in any of my 3 rooms, turn off heating of in a certain room if the window is opened, and maybe have a vacation button to set temp to a very low value.
Now, I am writing here because, of course, I am missing all the config needed for the automation.
What needs to be done:
automation temp

- alias: sendtemp-room1
  trigger:
    - platform: time_pattern
      seconds: "/20"
  action:
    service: mqtt.publish
    data: {"payload": "{{ states('sensor.0x00158d000465809a_temperature') }}", "topic": "dummy-current-temp-room-1", "qos": 0, "retain": 0}

Where 0x00158d000465809a is the entity id of my zigbee aqara temperature sensor.

automation window room1 open

- alias: window-open
  trigger:
    - platform: time_pattern
      seconds: "/20"
  condition: 
    ??? state of window sensor is open
  action:
    service: mqtt.publish
    data: {"payload": "10", "topic": "dummy-eco-set-temp-room1"}

This should publish a value of 10 (as in degrees) to dummy-eco-set-temp-room1. I do not know yet what values does the sensor output, if it is on/off or open/close.
I do not know how to format the condition.

automation window room1 closed

- alias: window-closed
  trigger:
    - platform: time_pattern
      seconds: "/20"
  condition: 
    ??? state of window sensor is closed
  action:
    service: mqtt.publish
    data: {"payload": ??? value on topic "dummy-set-temp-room1", "topic": "dummy-eco-set-temp-room1"}

I also do not know if this will work. It should take a value from topic dummy-set-temp-room1 and forward it to dummy-eco-set-temp-room1.

automation TRV room1

automation mode loop room1

automation setpoint loop room1

automation mode on

- alias: boiler mode on
  trigger:
    - platform: time_pattern
      minutes: "/1"
  condition: or
    conditions: 
    ??? mode received on topic "dummy-mode-room1" is on
    ??? mode received on topic "dummy-mode-room2" is on
    ??? mode received on topic "dummy-mode-room3" is on
  action:
    service: mqtt.publish
    data: {"payload": "on", "topic": "opentherm-thermostat/mode/set"}

This should send on payload to the topic opentherm-thermostat/mode/set if any of the rooms has the thermostat set to heating.
I do not know how to formulate the line for checking if the state received on mqtt topic dummy-mode-room1 is on.

automation mode off

- alias: boiler mode off
  trigger:
    - platform: time_pattern
      minutes: "/1"
  condition: and
    conditions: 
    ??? mode received on topic "dummy-mode-room1" is off
    ??? mode received on topic "dummy-mode-room2" is off
    ??? mode received on topic "dummy-mode-room3" is off
  action:
    service: mqtt.publish
    data: {"payload": "off", "topic": "opentherm-thermostat/mode/set"}

This should send payload off to topic opentherm-thermostat/mode/set if all the thermostats are switched off.
as well as above, I do not know how to check the state for conditions.

automation algorithm

mqtt climate config in configuration.yaml:

  - platform: mqtt
    modes:
      - "off"
      - "heat"
    name: Boiler
    current_temperature_topic: "dummy-current-temp-room-1"
    mode_command_topic: "dummy-mode-room1"
    mode_state_topic: "loop-mode-room1"
    temperature_command_topic: "dummy-set-temp-room1"
    temperature_state_topic: "loop-setpoint-room1"
    min_temp: 12
    max_temp: 28
    value_template: "{{ value }}"
    temp_step: 0.2

I will come back with more info on what I think should be.

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