Passing data to Arduino from HA

Hi,
I’m trying to connect Home Assistant to Arduino over the USB, however I’m facing several issues. I have configured Arduino switch (lights), which works perfectly and control it over wifi. Next thing, which I wanted to configure is number input and send that particular number generated on input to arduino to set the temperature. For example send 28 as 28°C to arduino, which would execute function for heating up house on 28°C. My issue is that I can’t configure sending this number to firmata so arduino could work with the number… I can’t even see which process, which is happening. Can someone help me with configuration or at least me tutorial or working example?

Thank you <3

My actual config:

   arduino:
  port: /dev/ttyACM0
  
switch:
  platform: arduino
  pins:
13:
  name: SvětélkoLEDProsímVNociNesvítitSpinkám:C
  initial: true
7:
  name: Humidity
3:
  name: Room temperature
2:
  name: Floor temperature

sensor:
  platform: arduino
  pins:
A2:
  name: Analog humidity
A1:
  name: Brightness
  
input_number:
  brightness:
name: Brightness
initial: 254
min: 0
max: 254
step: 1
automation:
  - alias: Adjust Brightness
trigger:
  platform: state
  entity_id: input_number.brightness
action:
  - service: sensor.turn_off
    # Note the use of 'data_template:' below rather than the normal 'data:' if you weren't using an input variable
    data_template:
      entity_id: switch.svetelkoledprosimvnocinesvititspinkamc
      brightness: "{{ trigger.to_state.state | int }}"

Please please format your code properly, see at the top of the page.

It should be done! Thank you!

Does anyone know how to do this? I dunno If its even possible…