LEDs

The KCH HAT provides diagnostic information about the state of your robot through a collection of preconfigured and user-controllable LEDs. It is part of the Brain Board assembly, however control of its LEDs is provided through a distinct API.

The LEDs on the KCH can be accessed via the kch object:

R.kch.something...

The KCH HAT has three RGB LEDs: A, B and C. The LEDs default to off, however once set they will hold their value even if your code exits. This is potentially useful to understand the current state of your code as it runs or the final state of the code afterwards.

Each of the LEDs can be set to one of 8 colours:

# Set LED A to red
R.kch.leds[UserLED.A] = Colour.RED

# Set LED B to cyan
R.kch.leds[UserLED.B] = Colour.CYAN

# Turn LED C off
R.kch.leds[UserLED.C] = Colour.OFF

The available colours are:

OFF
RED
YELLOW
GREEN
CYAN
BLUE
MAGENTA
WHITE

Alternatively you can set the red, green and blue channels for a given LED separately:

# Turn on the blue segment of LED A
R.kch.leds[UserLED.A].b = True

# Turn off the red segment of LED B
R.kch.leds[UserLED.B].r = False

# Turn on green segment of LED B
R.kch.leds[UserLED.B].g = True