Nanoleaf driver

This controls the panel of lights under the caravan settee.

endpoint	method	description	params
/ui/api/hex	GET	change the hex colour of the panels	hex: a hex string without the #
/ui/api/hue	GET	change the hue value of the panels	hue: int
/ui/api/brightness	GET	change the brightness value of the panels	brightness: int duration : speed of brightness change in seconds
/ui/api/sat	GET	change the saturation value of the panels	sat: int
/ui/api/ct	GET	change the ct (colour) value of the panels	ct: int
/ui/api/on	GET	turn panels on
/ui/api/off	GET	turn panels off
/ui/api	GET	set multiple values at once.	hue, brightness, sat, ct, on, duration: descriptions as above