Teemu R 0c71957aa8
Return on_since only when its available and the device is on (#48)
* moves on_since property to smartdevice class, as it is not plug only
* returns None if the value is not available (some bulbs), or if the device is off
2020-04-24 17:47:57 +03:00
..
2020-04-12 15:57:49 +02:00
2019-12-18 09:11:18 +01:00