I cant test this, but should it be something like:
# Example button configuration
button:
- platform: template
name: Livingroom Lazy Mood 1
id: my_button
# Optional variables:
icon: "mdi:emoticon-outline"
on_press:
- logger.log: "Button 1 pressed"
- platform: template
name: Livingroom Lazy Mood 2
id: my_button2
# Optional variables:
icon: "mdi:emoticon-outline"
on_press:
- logger.log: "Button 2 pressed"
As for the other thing, that might be something you need to write your own driver for? if you need some inspiration, this repo has a driver for mitsubishi heatpumps, which does something similar (read/write to a uart): https://github.com/echavet/MitsubishiCN105ESPHome