on/off problem w/ tp-link LB130 bulb

[keleher]

First, neat code, I love it.

However, if the bulb is on, the fading and color changes work great.

If the bulb is off, the returned state is a bit different, hue etc are moved under 'dft_on_state'.

Whether on or off, light.on() (stuck into demo.py) fails with
"RuntimeError: Error connecting to bulb".

Clearly connecting works, as we get the status below (this is from the "off" state), but accessing the on-off status is not working.

{"system":{"get_sysinfo":{"sw_ver":"1.4.3 Build 170504 Rel.144921","hw_ver":"1.0","model":"LB130(US)","description":"Smart Wi-Fi LED Bulb with Color Changing","alias":"The Tulip","mic_type":"IOT.SMARTBULB","dev_state":"normal","mic_mac":"50C7BF24C860","deviceId":"801296681DBB068B73C4153BF4B86BDB1801D9ED","oemId":"05BF7B3BE1675C5A6867B7A7E4C9F6F7","hwId":"111E35908497A05512E259BB76801E10","is_factory":false,"disco_ver":"1.0","ctrl_protocols":{"name":"Linkie","version":"1.0"},"light_state":{"on_off":0,"dft_on_state":{"mode":"normal","hue":300,"saturation":90,"color_temp":3800,"brightness":0}},"is_dimmable":1,"is_color":1,"is_variable_color_temp":1,"preferred_state":[{"index":0,"hue":0,"saturation":0,"color_temp":2700,"brightness":50},{"index":1,"hue":0,"saturation":75,"color_temp":0,"brightness":100},{"index":2,"hue":120,"saturation":75,"color_temp":0,"brightness":100},{"index":3,"hue":240,"saturation":75,"color_temp":0,"brightness":100}],"rssi":-60,"active_mode":"none","heapsize":309692,"err_code":0}}}