Distance

Introduction

The Distance Sensor allows your robot to detect the presence of an object and measure its distance.

Below is a list of available blocks:

• Distance found object? – Returns whether any object is currently detected.

• object distance – Returns the distance of the nearest object from the Distance Sensor.

Distance found object?

The Distance found object? block returns a Boolean indicating whether the Distance Sensor has detected an object within 2000 mm.

• True – The Distance Sensor has detected an object.

• False – The Distance Sensor has not detected an object.

    <[FrontDistance v] found an object?>

Parameters	Description
distance sensor	Which Distance Sensor to use.

Example

    when started :: hat events
    [Spin until the Distance Sensor detects an object.]
    turn [right v]
    wait until <[FrontDistance v] found an object?>
    stop driving

object distance

The object distance returns the distance of the nearest object from the Distance Sensor.

    ([FrontDistance v] distance in [mm v])

Parameters	Description
distance sensor	Which Distance Sensor to use.
unit	The unit of measurement, which can be one of the following: mm (millimeters) inches

Example

    when started :: hat events
    [Don't print the message until the Distance Sensor detects an object.]
    turn [right v]
    wait until <[FrontDistance v] found an object?>
    stop driving
    print ([FrontDistance v] distance in [mm v]) ▶