Update WiFi_router.md

CommonInitScripts/WiFi_router.md

@@ -5,13 +5,14 @@
 1. "WLAN" tab
     1. Set SSID and PW on 2.4 GHz and 5Ghz WiFI.
 1. "System tools" tab
+    1. Set the root login password for the router's WebGUI.
     1. Turn off led indicators ("Indicator Status Management" -> "Indicator Switch" -> Off).
     1. Turn off "Enable Energy Saving" ("Advanced power management" -> "Enable Energy Saving" - uncheck).
 1. 5G Advanced Network Settings:
     1. Turn off "Band Steering" on 5 GHz WiFi.
     1. Set the 5GHz "channel" to fixed 100 (see: <https://en.wikipedia.org/wiki/List_of_WLAN_channels>) if it is not interfering with a neighbor's WiFI (use Android WiFi analysis tools to investigate). Note: Channel 100 is a good choice because it has fewer devices on it as lower channels do and it has enough space for a continuous 80MHz resp. 160 MHz channel width. European weather radars are on channels 120 - 130 <https://www.shmu.sk/sk/?page=2037>, hence the full 160 MHz channel width might be problematic, but 80 MHz width fits well without interfering with anything.
     1. Set "Channel width" to "Auto 20/40/80/160" or to "Auto 20/40/80" (prefer 160 if the signal is strong enough, test both).
-    1. "Wi-Fi Coverage Management" -> "Select a policy to synchronize Wi-Fi parameters to the newly detected external AP." -> "Do not enable automatic synchronization."
+    1. "Wi-Fi Coverage Management" -> "Select a policy to synchronize Wi-Fi parameters to the newly detected external AP." -> "Do not enable automatic synchronization." (TODO this is probably not necessary)
 1. Test the connection speed and stability from multiple rooms in the flat + multiple devices.
 
 ## Device config (Android phones, PCs, laptops, smart watches...)