Tendency/forecast icon missing

[adamjohnson]

I cannot get the function with the forecast icon to work. From the sensor page in meteohub is the data from the sensor like this: 26.1° 44% 974.7mb (1019.4mb) fc:-1. I guess the fc-value is the one that should decide the weather icon for meteohub. But since it always is -1 it is probably not reading correctly. Or not supported with WH-1080?

MeteoHub: 4.7m (Build 5599)
997 BogoMIPS, 256 MB RAM, ALIX.1D (500 MHz)