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on event distance pause until
Infrared
on event distance pause until
on event pause until is pressed was pressed set remote channel
on color detected pause until color detected on light detected pause until light condition detected color light
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Documentation
About FAQ Projects GitHub Troubleshoot EV3 Manager Bluetooth Forum LEGO Support FIRST LEGO League
Reference
show string show number show value show mood show image clear screen show ports on event is pressed was pressed pause until set light battery level
run stop reset set brake set inverted set regulated tank steer angle speed clear counts stop all motors
Sensors
on event pause until is pressed was pressed
angle rate reset
on event distance pause until
Infrared
on event distance pause until
on event pause until is pressed was pressed set remote channel
on color detected pause until color detected on light detected pause until light condition detected color light
play sound effect play sound effect until done play tone ring tone stop all sounds rest change tempo by set tempo note frequency beat set volume
seconds millis reset pause until
log log value send to screen
Blocks
On Start
repeat for while for of
if Boolean
assign change var var
Math JavaScript blocks Custom blocks
Python
Calling Sequencing Variables Operators Statements Functions Classes
JavaScript
Calling Sequencing Variables Operators Statements Functions Types Classes Interfaces Generics
Types
Number String Boolean Array Function
Developers
Command Line Interface Visual Studio Code support Blocks Embed
Getting Started
Try Use
Tutorials
Wake Up! Make An Animation What Animal Am I? Music Brick Run Motors Tank ZigZag Touch to Run Touch Sensor Values What Color? Line Following Red Light, Green Light Reflected Light Measure Reflected Light Calibration Object Near? Security Alert
Coding
Autonomous Parking Object Detection Line Detection
Design Engineering
Make It Move Without Wheels Make It Smarter and Faster Make a System that Communicates
Maker
Make a Sound Machine Make a Security Gadget

pause Until

Make your program wait until an some object is detected in proximity of the infrared sensor.

sensors.infrared1.pauseUntil(InfraredSensorEvent.ObjectDetected);

How an object is detected depends on the light thresholds set for the sensor. A threshold is a number for relative distance of the a return of reflected infrared light. The brighter the light, the nearer the object is. The value for what near means is determined by this threshold. A certain minimum amount of light returned is also set to determine that an object is detected. The two thresholds you can set are:

  • near: a distance to set to detect objects coming close
  • detected: the brightness of infrared light to needed to detect presence of another infrared transmitter.

Parameters

  • event: the object detection action to wait for. The detection types (events) are:
    • detected: some other object is sending out infrared light
    • near: the sensor detected something within the distance of the near threshold

Example

Wait for another object sending out infrared light. Show a message on the screen when it’s dectected.

brick.showString("Waiting for another", 1);
brick.showString("robot to appear...", 2);
sensors.infrared1.pauseUntil(InfraredSensorEvent.ObjectDetected);
brick.showString("Hey, I just saw", 1)
brick.showString("Something!", 2);

See also

on event

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