Compass gauge suppress display numeric value

I display the wind direction with a compass gauge.
The values that represent the direction are from 0 - 15.
But I don't want that value displayed in the center.
The winddirection is displayed in text above the gauge.
Is it possible to suppress the center display of the value?
Or the alphabetical direction so N, ENE, NE and so on.
Or should I multiply the value so I get the degree angle displayed as a workaround?

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