led_gamma_control.md

led_gamma_control () - led_gammaCtrl command handler, usage: led_gammaCtrl <sub-command> [parameter(s)]
	sub-commands:
		cal [f f f]   - set RGB calibration values from color-picker or parameters
		gamma <f>     - LED gamma correction, range 1.0-3.0: 1.0 = gamma off, default = 2.2
		brtMinRGB <f> - minimum brightness in % for RGB mode, range 0.0-10.0%, default = 0.1
		brtMinCW <f>  - minimum brightness in % for CW mode, range 0.0-10.0%, default = 0.1
		list          - list settings (and enable additional messages)
	Results will be displayed as Logs Info:CFG: messages (may want to turn off MAIN, MQTT and GEN to silence other messages)
	Any sub-command will enable channel messages containing output values in %

	Calibration sequence:
		1: clear current calibration values (= 1.0, default) by one of these methods:
		   a: set color-picker to "white", i.e. #FFFFFF and enter command "led_gammaCtrl cal"
		   b: or set values directly with command "led_gammaCtrl cal 1.0 1.0 1.0"
		2: adjust RGB LEDs to emit white light of preferred temperature and brightness
		3: enter command "led_gammaCtrl cal" - if successful the settings will be listed and stored in flash

	Use command "gamma <f>" to set gamma value. Range 1.0-3.0: 1.0 = gamma off, default is 2.2.
	  To fully disable gamma correction you may also want to set brtMinX to 0.0.
	Use commands "brtMinRGB <f>" and "brtMinCW <f>" to set minimum brightness for RGB and CW LEDs.
		Valid range is 0.0-10.0% of full range (including brightness 0). "channel messages" is useful in finding suitable
		range: adjust brightness to desired minimum level and use the highest channel % value as brtMinX parameter.
		Channels 0-2 is RGB, channels 3-4 is CW
	Use command "list" to view gamma and calibration settings.