MQTT topics as device or as variable

I am using WeatherDisplay with my Davis Vantage 2 PRO weather-station and has done that for many years. I want to use that data and sensors in my Homey.
In the latest version of Weather-Display it can send tags for all values and sensors. I am now sendning to a Mosquitto broker and have installed MQTT client on my Homey.
But I dont understand how I can use the MQTT data/sensors in Homey. Ha anyone else worked with MQTT tags for example temp, rain and wind and used in flows in Homey ?


this the answer to many questions