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on event pause until is pressed was pressed
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on event distance pause until
on event distance pause until
Infrared beacon
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
on event distance pause until
Infrared beacon
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

was Pressed

See if a button on a remote infrared beacon was pressed since the last time it was checked.

sensors.remoteButtonBottomLeft.wasPressed()

An infrared beacon works with an infrared sensor connected to the LEGO® MINDSTORMS® Education EV3. The beacon sends a signal over infrared with information about button presses on the beacon. The infrared sensor receives the signal from the beacon and records a button event.

If a button was pressed, then that event is remembered. Once you check if a beacon button was pressed, that status is set back to false. If you check again before the beacon button is pressed another time, the was pressed status is false. Only when the button is pressed will the was pressed status go to true.

Returns

  • a boolean value that is true if the beacon button was pressed before. It’s false if the button was not pressed.

Remote channel

In order to recognize a button event signalled from a remote beacon, an infrared sensor must know what channel to listen on for messages from that beacon. An infrared sensor needs to set the channel first, then it can receive messages transmitted by the beacon. Before waiting for, or checking on an button event from a beacon, use set remote channel.

Example

If the beacon button top left was pressed, show a green status light. Otherwise, set the status light to orange.

sensors.infrared1.setRemoteChannel(InfraredRemoteChannel.Ch0)
forever(function () {
    if (sensors.remoteButtonTopLeft.wasPressed()) {
        brick.setStatusLight(StatusLight.Green)
    } else {
        brick.setStatusLight(StatusLight.Orange)
    }
    pause(500)
})

See also

is pressed, on event

EV3 Infrared Beacon

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