Home Assistant mqtt don't works - inputs/outputs unavailable

[AlenDinDon]

Dear Kincony

I have a new  KC868_A8
I bought to use it with Home Assistant input/output

I set mqtt on the KC868_A8 as your guide and it works fine. Connection is done.

I have a problem on home assistant - it can find all the inputs/outputs but the are always unavailable. Can't work

Where is the problem?

I see the IP of the board is not set on the configuration file. Is it right?

the board is: KC868-A8-V1.7
home assistant is updated to last version

enclosed you can find the configuration.yaml file
how can I fix?

thank you in adavance, best regards from Italy!