Object Sensor

Introduction

The Object Sensor is an infrared (IR) proximity sensor that detects when an object is close by using reflected IR light.

Below is a list of available blocks:

• Object Sensor reflectivity – Reports the amount of light reflected from the object.

• Object Sensor detects object – Reports whether the Object Sensor is detecting an object.

• set Object Sensor detection threshold – Sets the amount of reflected light needed before an object is considered to be detected.

• when Object Sensor – Runs the attached stack of blocks when the Object Sensor detects or loses an object.

Object Sensor reflectivity

The Object Sensor reflectivity reporter block reports the amount of light reflected from the object as a percent.

Note:

• 0% reflectivity means the object is very dark. The sensor sees a raw value of 3000 or higher.

• 100% reflectivity means the object is very bright. The sensor sees a raw value of 0.

  ([ObjectSensorA v] reflectivity in %)

Parameter	Description
device	Which Object Sensor to use, configured in the Devices window.

Object Sensor detects object

The Object Sensor detects object Boolean block reports whether the Object Sensor is detecting an object.

• True – The Object Sensor is detecting an object.

• False – The Object Sensor is not detecting an object.

  <[ObjectSensorA v] detects object?>

Parameter	Description
device	Which Object Sensor to use, configured in the Devices window.

set Object Sensor detection threshold

The set Object Sensor detection threshold stack block sets the amount of reflected light needed as a percent before an object is considered to be detected.

  set [ObjectSensorA v] detection threshold to [50] %

Parameter	Description
device	Which Object Sensor to use, configured in the Devices window.
detection threshold	The amount of reflected light needed to consider an object to be detected as a whole number.

when Object Sensor

The when Object Sensor hat block runs the attached stack of blocks when the Object Sensor detects or loses an object.

  when [ObjectSensorA v] object is [detected v] :: hat events

Parameters	Description
device	Which Object Sensor to use.
state	When the attached stack of blocks will run: detected runs blocks when an undetected object is now detected. lost runs when a detected object is now no longer detected.