readDistance

Read distance from ultrasonic sensor to object

Description

example

distance = readDistance(mysonicsensor) measures the distance from the ultrasonic sensor to an object, and returns the measurement in meters.

Examples

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Read the distance, in meters, between an ultrasonic sensor and an object.

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 the ultrasonic sensor.

mysonicsensor = sonicSensor(myev3)
mysonicsensor = 

  sonicSensor with properties:

    InputPort: 4

Read the distance, in meters, from the ultrasonic sensor to the nearest object.

distance = readDistance(mysonicsensor)
distance =

    0.4600

Input Arguments

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Connection to ultrasonic sensor, specified as a string that represents the object created using sonicSensor.

Example: mysonicsensor

Data Types: char

Output Arguments

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Distance to object in meters, returned as a double.