i am afraid you can’t create a button in hassio.
u can import buttons from integration.
and there is no button domain for google assistant:
Google Assistant - Home Assistant (home-assistant.io)
domains are :
- alarm_control_panel (arm/disarm)
- camera (streaming, requires compatible camera)
- group (on/off)
- input_boolean (on/off)
- input_select (option/setting/mode/value)
- scene (on)
- script (on)
- switch (on/off)
- fan (on/off/speed percentage/preset mode)
- light (on/off/brightness/rgb color/color temp)
- lock
- cover (on/off/set position)
- media_player (on/off/set volume (via set volume)/source (via set input source)/control playback)
- climate (temperature setting, hvac_mode)
- vacuum (dock/start/stop/pause)
- sensor (temperature setting for temperature sensors and humidity setting for humidity sensors)
- humidifier (humidity setting/on/off/mode)
biensur tu peu toujour lancer un script , ou un switch qui turn_on/turn_off en 500ms
j’essairai meme un sensor.
template:
- sensor:
- name: "CO2 nancras"
unit_of_measurement: "PPM"
state: >
{{ states('sensor.netatmo_maison_nancras_indoor_co2')