Groups are not handled correctly about pydect200

[tooh]

After updating tot 6.52 groups are still not handled correctly.

Device ID:           DB:55:D2-900
Device Name:         Hue
Device State:        ON
Device Power:        0.0W
Device Energy:       0Wh
Device Temperature:  inval degree Celsius  

Device ID:           087610161956
Device Name:         FRITZ!DECT 200 #1
Device State:        ON
Device Power:        0.35W
Device Energy:       1203Wh
Device Temperature:  8.5 degree Celsius