touchSensor

Connection to touch sensor

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.

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

Input Arguments

myev3 — Connection to EV3 brick

object handle

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

Example: myev3

Data Types: char

Output Arguments

mytouchsensor — Connection to touch sensor

object handle

Connection to touch sensor, returned as an object handle.

Properties

InputPort — Number of EV3 input port

1 | 2 | 3 | 4

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

readTouch

Read touch sensor value

Examples

Use a Touch Sensor to Detect Objects

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.