Touch LED#

Introduction#

The Touch LED includes blocks that control and monitor the VEX IQ (2nd gen) Touch LED. These blocks allow you to set color, brightness, and fade speed, as well as detect when the Touch LED is being pressed.

Below is a list of available blocks:

Looks – Control color and display properties.

Sensing – Detect user interaction.

Looks#

set Touch LED color#

The set Touch LED color block sets the color of the Touch LED using the current transition speed and brightness settings.

    set [TouchLED1 v] color to (none v)

Parameters

Description

touch led

Which Touch LED’s color to set, configured in the Devices window.

color

Sets the LED’s color to:

  • none – Turns off the Touch LED
  • red
  • green
  • blue
  • white
  • yellow
  • orange
  • purple
  • red violet
  • violet
  • blue violet
  • blue green
  • yellow green
  • yellow orange
  • red orange

Example

    when started :: hat events
    set [TouchLED11 v] color to (green v)
    wait (2) seconds
    set [TouchLED11 v] color to (none v)

set Touch LED fade#

The set Touch LED fade block sets how fast the Touch LED will transition between colors.

    set [TouchLED1 v] fade to [slow v]

Parameters

Description

touch led

Which Touch LED’s transition speed to set, configured in the Devices window.

transition speed

The speed at which the Touch LED will transition to the next color:

  • slow
  • fast
  • off – The color changes instantly with no transition. This is the default behavior of the Touch LED.

Example

    when started :: hat events
    set [TouchLED11 v] color to (green v)
    set [TouchLED11 v] fade to [slow v]
    wait (2) seconds
    set [TouchLED11 v] color to (red v)

set Touch LED brightness#

The set Touch LED brightness block sets the brightness of the Touch LED.

    set [TouchLED1 v] brightness to (50) %

Parameters

Description

touch led

Which Touch LED’s brightness to set, configured in the Devices window.

brightness

The brightness of the Touch LED from 0 to 100 as a percent.

Example

    when started :: hat events
    set [TouchLED11 v] brightness to (25) %
    set [TouchLED11 v] color to (green v)
    wait (2) seconds
    set [TouchLED11 v] brightness to (100) %

Sensing#

Touch LED pressed?#

The Touch LED pressed? block returns if a Touch LED is currently being pressed or not pressed. This block returns a Boolean value:

  • True - The Touch LED is being pressed.

  • False - The Touch LED is not being pressed

    <[TouchLED1 v] pressed?>

Parameters

Description

touch led

Which Touch LED to check, configured in the Devices window.

Example

    when started :: hat events
    [Don't print the message until the Touch LED Sensor is pressed.]
    wait until <[TouchLED11 v] pressed?>
    print [Touch LED was pressed.] on [Brain v] ◀ and set cursor to next row
On this page