How to send a value to the button for fan mode

[Eucliwood090]

How to send a value to the button for fan mode

I know how to retrieve the value of HA, but I would like to send the update of this value.

is there this option?

[Eucliwood090]

I found in mqtt explorer "fan mode state_topic" is missing

[Eucliwood090]

fan_mode_state_topic is missing in the climate.js input