@Vtorek82, just out of curiosity, isn’t your model support Ecowitt output?
I guess this is the one:
In the WS View app you should have an option to configure the station for it.
Menu/Device List then you select the Station and just press the Next button until you reach the Customized page. Here you can set it up to send data directly to HA, and you can skip the cloud servers of Weather Underground.
You can use the official Ecowitt - Home Assistant integration.
The WS View app should allow you to update the firmware as well, if the option is not there.