Problem with Yaml demo file

[Bigh]

1. where your home assistant installed? raspberry pi?
2. during download firmware, do you have removed RF433M receiver module from KC868-A16 PI 

i think i solved the problem.
it works only with "over the air" with OTA description in the .yaml

question: 

1. is there any option to work with ethernet insted of wifi? when i try it said only wifi so i had to remove the configuration.
2. please send me the code for enabling the RF at esp home