Board for window contact sensors

[threadstone]

1. Yes , you are right, suggest to use DHCP, just delete manual_ip commands:
  # Optional manual IP
#  manual_ip:
#  static_ip: 192.168.1.198
#    gateway: 192.168.1.1
#    subnet: 255.255.255.0

2. Yes, you are right.

Today I changed the code from Wifi to LAN. It works perfect but I have one problem.
When I disconnect the LAN-cable it still shows up as online (Home Assistant -> ESPHome). Is that normal? With Wifi it was directly shown as not available.