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touchSensor

Connection to touch sensor

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Add-On Required: This feature requires the MATLAB Support Package for LEGO MINDSTORMS EV3 Hardware add-on.

Description

This object represents a connection to an EV3 Touch Sensor (item number 45507). To check whether an item is pressing the front of the sensor, use this object with the readTouch function.

Creation

Syntax

mytouchsensor = touchSensor(myev3)
mytouchsensor = touchSensor(myev3,inputport)

Description

mytouchsensor = touchSensor(myev3) creates a connection to a touch sensor.

If multiple touch sensors are attached to the EV3 brick, this function chooses the sensor that is attached to the EV3 input port with the lowest number.

example

mytouchsensor = touchSensor(myev3,inputport) creates a connection to a touch sensor that uses a specific EV3 input port defined by the InputPort property.

example

Input Arguments

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Connection to EV3 brick, specified as a string that represents the object created using legoev3.

Example: myev3

Data Types: char

Output Arguments

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Connection to touch sensor, returned as an object handle.

Properties

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This property is read-only.

Number of the EV3 input port that the sensor uses, returned as a double.

Example: 1

Data Types: double

Object Functions

readTouchRead touch sensor value

Examples

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Determine whether an object is pressing the touch sensor.

Create a connection to the EV3 brick called myev3.

myev3 = legoev3
myev3 = 

  legoev3 with properties:

      FirmwareVersion: 'V1.03E'
           HardwareID: []
            IPAddress: []
    CommunicationType: 'USB'
         BatteryLevel: 100
     ConnectedSensors: {'touch'  'gyro'  'color'  'sonic'}

The sensor appears in the list of connected sensors.

Connect to a touch sensor.

mytouchsensor = touchSensor(myev3)

mytouchsensor = 

  touchSensor with properties:

    InputPort: 1

Read the state of the touch sensor.

pressed = readTouch(mytouchsensor)
pressed =

     0

This result indicates that an object is not pressing the touch sensor.

Press the touch sensor while you take another reading.

pressed = readTouch(mytouchsensor)
pressed =

     1

This result indicates that an object is pressing the touch sensor.

See Also

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