{"id":981,"date":"2020-04-11T23:37:16","date_gmt":"2020-04-11T16:37:16","guid":{"rendered":"https:\/\/www.phidgets.com\/educationDEV\/?page_id=981"},"modified":"2022-12-01T01:26:28","modified_gmt":"2022-11-30T18:26:28","slug":"rover-kit-avoid-obstacles","status":"publish","type":"page","link":"https:\/\/www.phidgets.com\/education\/learn\/projects\/rover-kit-avoid-obstacles\/","title":{"rendered":"Avoid Obstacles"},"content":{"rendered":"

[et_pb_section fb_built=”1″ specialty=”on” _builder_version=”4.16″ global_colors_info=”{}”][et_pb_column type=”1_3″ _builder_version=”4.16″ custom_padding=”|||” global_colors_info=”{}” custom_padding__hover=”|||”][et_pb_code admin_label=”ph-vertical-menu” _builder_version=”4.16″ vertical_offset_tablet=”0″ horizontal_offset_tablet=”0″ z_index_tablet=”0″ box_shadow_horizontal_tablet=”0px” box_shadow_vertical_tablet=”0px” box_shadow_blur_tablet=”40px” box_shadow_spread_tablet=”0px” global_colors_info=”{}”]<\/p>\n

Introduction <\/a> Parts <\/a> Assemble <\/a> Connect <\/a> Move <\/a> Turn <\/a> Avoid obstacles <\/a> Overview <\/a> Write Code <\/a> Practice <\/a> Troubleshoot <\/a> Challenge <\/a><\/div>\n

[\/et_pb_code][\/et_pb_column][et_pb_column type=”2_3″ specialty_columns=”4″ _builder_version=”4.16″ custom_padding=”|||” global_colors_info=”{}” custom_padding__hover=”|||”][et_pb_row_inner module_id=”overview” _builder_version=”4.16″ vertical_offset_tablet=”0″ horizontal_offset_tablet=”0″ z_index_tablet=”0″ box_shadow_horizontal_tablet=”0px” box_shadow_vertical_tablet=”0px” box_shadow_blur_tablet=”40px” box_shadow_spread_tablet=”0px” global_colors_info=”{}”][et_pb_column_inner saved_specialty_column_type=”2_3″ _builder_version=”4.16″ custom_padding=”|||” global_colors_info=”{}” custom_padding__hover=”|||”][et_pb_code admin_label=”Rover kit: Avoid obstacles” _builder_version=”4.16″ vertical_offset_tablet=”0″ horizontal_offset_tablet=”0″ z_index_tablet=”0″ box_shadow_horizontal_tablet=”0px” box_shadow_vertical_tablet=”0px” box_shadow_blur_tablet=”40px” box_shadow_spread_tablet=”0px” global_colors_info=”{}”]<\/p>\n

Projects<\/a><\/div>\n

<\/p>\n

Phidget Rover Kit<\/div>\n

<\/p>\n

Avoid Obstacles<\/h1>\n

[\/et_pb_code][et_pb_code admin_label=”Instructions” _builder_version=”4.16″ vertical_offset_tablet=”0″ horizontal_offset_tablet=”0″ z_index_tablet=”0″ box_shadow_horizontal_tablet=”0px” box_shadow_vertical_tablet=”0px” box_shadow_blur_tablet=”40px” box_shadow_spread_tablet=”0px” global_colors_info=”{}”]In this step, you will learn how to avoid obstacles using your Sonar Phidget. <\/pee>[\/et_pb_code][et_pb_image src=”https:\/\/www.phidgets.com\/education\/wp-content\/uploads\/2020\/04\/rover-a1.gif” _builder_version=”4.16″ vertical_offset_tablet=”0″ horizontal_offset_tablet=”0″ z_index_tablet=”0″ box_shadow_horizontal_tablet=”0px” box_shadow_vertical_tablet=”0px” box_shadow_blur_tablet=”40px” box_shadow_spread_tablet=”0px” global_colors_info=”{}”][\/et_pb_image][et_pb_code admin_label=”Instructions” _builder_version=”4.16″ vertical_offset_tablet=”0″ horizontal_offset_tablet=”0″ z_index_tablet=”0″ box_shadow_horizontal_tablet=”0px” box_shadow_vertical_tablet=”0px” box_shadow_blur_tablet=”40px” box_shadow_spread_tablet=”0px” global_colors_info=”{}”]You can keep working from your PhidgetsRover<\/em> project in this step. Add the following code to your file and run your code.<\/pee>[\/et_pb_code][\/et_pb_column_inner][\/et_pb_row_inner][et_pb_row_inner module_id=”write-code” _builder_version=”4.16″ vertical_offset_tablet=”0″ horizontal_offset_tablet=”0″ z_index_tablet=”0″ box_shadow_horizontal_tablet=”0px” box_shadow_vertical_tablet=”0px” box_shadow_blur_tablet=”40px” box_shadow_spread_tablet=”0px” global_colors_info=”{}”][et_pb_column_inner saved_specialty_column_type=”2_3″ _builder_version=”4.16″ custom_padding=”|||” global_colors_info=”{}” custom_padding__hover=”|||”][et_pb_text disabled_on=”on|on|on” admin_label=”WriteCode Placeholder” _builder_version=”4.16″ vertical_offset_tablet=”0″ horizontal_offset_tablet=”0″ z_index_tablet=”0″ text_text_shadow_horizontal_length_tablet=”0px” text_text_shadow_vertical_length_tablet=”0px” text_text_shadow_blur_strength_tablet=”1px” link_text_shadow_horizontal_length_tablet=”0px” link_text_shadow_vertical_length_tablet=”0px” link_text_shadow_blur_strength_tablet=”1px” ul_text_shadow_horizontal_length_tablet=”0px” ul_text_shadow_vertical_length_tablet=”0px” ul_text_shadow_blur_strength_tablet=”1px” ol_text_shadow_horizontal_length_tablet=”0px” ol_text_shadow_vertical_length_tablet=”0px” ol_text_shadow_blur_strength_tablet=”1px” quote_text_shadow_horizontal_length_tablet=”0px” quote_text_shadow_vertical_length_tablet=”0px” quote_text_shadow_blur_strength_tablet=”1px” header_text_shadow_horizontal_length_tablet=”0px” header_text_shadow_vertical_length_tablet=”0px” header_text_shadow_blur_strength_tablet=”1px” header_2_text_shadow_horizontal_length_tablet=”0px” header_2_text_shadow_vertical_length_tablet=”0px” header_2_text_shadow_blur_strength_tablet=”1px” header_3_text_shadow_horizontal_length_tablet=”0px” header_3_text_shadow_vertical_length_tablet=”0px” header_3_text_shadow_blur_strength_tablet=”1px” header_4_text_shadow_horizontal_length_tablet=”0px” header_4_text_shadow_vertical_length_tablet=”0px” header_4_text_shadow_blur_strength_tablet=”1px” header_5_text_shadow_horizontal_length_tablet=”0px” header_5_text_shadow_vertical_length_tablet=”0px” header_5_text_shadow_blur_strength_tablet=”1px” header_6_text_shadow_horizontal_length_tablet=”0px” header_6_text_shadow_vertical_length_tablet=”0px” header_6_text_shadow_blur_strength_tablet=”1px” box_shadow_horizontal_tablet=”0px” box_shadow_vertical_tablet=”0px” box_shadow_blur_tablet=”40px” box_shadow_spread_tablet=”0px” disabled=”on” global_colors_info=”{}”][\/et_pb_text][\/et_pb_column_inner][\/et_pb_row_inner][et_pb_row_inner module_class=”ph-user-java” _builder_version=”4.16″ vertical_offset_tablet=”0″ horizontal_offset_tablet=”0″ z_index_tablet=”0″ box_shadow_horizontal_tablet=”0px” box_shadow_vertical_tablet=”0px” box_shadow_blur_tablet=”40px” box_shadow_spread_tablet=”0px” global_colors_info=”{}”][et_pb_column_inner saved_specialty_column_type=”2_3″ _builder_version=”4.16″ custom_padding=”|||” global_colors_info=”{}” custom_padding__hover=”|||”][et_pb_code admin_label=”Write code Java” _builder_version=”4.16″ vertical_offset_tablet=”0″ horizontal_offset_tablet=”0″ z_index_tablet=”0″ box_shadow_horizontal_tablet=”0px” box_shadow_vertical_tablet=”0px” box_shadow_blur_tablet=”40px” box_shadow_spread_tablet=”0px” global_colors_info=”{}”]<\/p>\n

Write code (Java)<\/h2>\n

Not your programming language? Set your preferences<\/a> so we can display relevant code examples<\/pee>[\/et_pb_code][et_pb_code admin_label=”Code Sample – Netbeans” module_class=”ph-user-netbeans” _builder_version=”4.16″ vertical_offset_tablet=”0″ horizontal_offset_tablet=”0″ z_index_tablet=”0″ box_shadow_horizontal_tablet=”0px” box_shadow_vertical_tablet=”0px” box_shadow_blur_tablet=”40px” box_shadow_spread_tablet=”0px” global_colors_info=”{}”]<\/p>\n

  package phidgetsrover;\/\/Add Phidgets Libraryimport com.phidget22.*;public class PhidgetsRover {    public static void main(String[] args) throws Exception {        \/\/Connect to wireless rover        Net.addServer(\"\", \"192.168.100.1\", 5661, \"\", 0);        \/\/Create        DCMotor leftMotors = new DCMotor();        DCMotor rightMotors = new DCMotor();        DistanceSensor sonar = new DistanceSensor();        \/\/Address        leftMotors.setChannel(0);        rightMotors.setChannel(1);        \/\/Open        leftMotors.open(5000);        rightMotors.open(5000);        sonar.open(5000);        while (true) {            System.out.println(\"Distance: \" + sonar.getDistance() + \" mm\");                        if (sonar.getDistance() < 200) {                \/\/Object detected! Stop motors                leftMotors.setTargetVelocity(0);                rightMotors.setTargetVelocity(0);            } else {                \/\/Move forward slowly (25% max speed)                leftMotors.setTargetVelocity(0.25);                rightMotors.setTargetVelocity(0.25);            }            \/\/Wait for 250 milliseconds            Thread.sleep(250);        }    }}  <\/code><\/pre>\n
[\/et_pb_code][et_pb_code admin_label=”Code Sample – Eclipse” module_class=”ph-user-eclipse” _builder_version=”4.16″ vertical_offset_tablet=”0″ horizontal_offset_tablet=”0″ z_index_tablet=”0″ box_shadow_horizontal_tablet=”0px” box_shadow_vertical_tablet=”0px” box_shadow_blur_tablet=”40px” box_shadow_spread_tablet=”0px” global_colors_info=”{}”]<\/p>\n
  \/\/Add Phidgets Libraryimport com.phidget22.*;public class PhidgetsRover {    public static void main(String[] args) throws Exception {        \/\/Connect to wireless rover        Net.addServer(\"\", \"192.168.100.1\", 5661, \"\", 0);        \/\/Create        DCMotor leftMotors = new DCMotor();        DCMotor rightMotors = new DCMotor();        DistanceSensor sonar = new DistanceSensor();        \/\/Address        leftMotors.setChannel(0);        rightMotors.setChannel(1);        \/\/Open        leftMotors.open(5000);        rightMotors.open(5000);        sonar.open(5000);        while (true) {            System.out.println(\"Distance: \" + sonar.getDistance() + \" mm\");                        if (sonar.getDistance() < 200) {                \/\/Object detected! Stop motors                leftMotors.setTargetVelocity(0);                rightMotors.setTargetVelocity(0);            } else {                \/\/Move forward slowly (25% max speed)                leftMotors.setTargetVelocity(0.25);                rightMotors.setTargetVelocity(0.25);            }            \/\/Wait for 250milliseconds            Thread.sleep(250);        }    }}  <\/code><\/pre>\n
[\/et_pb_code][et_pb_code admin_label=”Code Sample – Processing” module_class=”ph-user-processing” _builder_version=”4.16″ vertical_offset_tablet=”0″ horizontal_offset_tablet=”0″ z_index_tablet=”0″ box_shadow_horizontal_tablet=”0px” box_shadow_vertical_tablet=”0px” box_shadow_blur_tablet=”40px” box_shadow_spread_tablet=”0px” global_colors_info=”{}”]<\/p>\n
  \/\/Add Phidgets Library import com.phidget22.*;\/\/DefineDCMotor leftMotors;DCMotor rightMotors;DistanceSensor sonar;void setup(){  try{        \/\/Connect to wireless rover    Net.addServer(\"\",\"192.168.100.1\", 5661,\"\",0);        \/\/Create    leftMotors = new DCMotor();    rightMotors = new DCMotor();    sonar = new DistanceSensor();        \/\/Address     leftMotors.setChannel(0);    rightMotors.setChannel(1);        \/\/Open    leftMotors.open(5000);    rightMotors.open(5000);    sonar.open(5000);      }catch(Exception e){    \/\/Handle Exceptions    e.printStackTrace();  }}void draw(){  try{        println(\"Distance: \" + sonar.getDistance() + \" mm\");        if(sonar.getDistance() < 200){      \/\/Object detected! Stop motors      leftMotors.setTargetVelocity(0);      rightMotors.setTargetVelocity(0);    } else{      \/\/Use your Phidgets      leftMotors.setTargetVelocity(0.25);      rightMotors.setTargetVelocity(0.25);    }        \/\/Wait for 250 milliseconds    delay(250);      }catch(Exception e){    \/\/Handle Exceptions    e.printStackTrace();  }}  <\/code><\/pre>\n
[\/et_pb_code][\/et_pb_column_inner][\/et_pb_row_inner][et_pb_row_inner module_class=”ph-user-python” _builder_version=”4.16″ vertical_offset_tablet=”0″ horizontal_offset_tablet=”0″ z_index_tablet=”0″ box_shadow_horizontal_tablet=”0px” box_shadow_vertical_tablet=”0px” box_shadow_blur_tablet=”40px” box_shadow_spread_tablet=”0px” global_colors_info=”{}”][et_pb_column_inner saved_specialty_column_type=”2_3″ _builder_version=”4.16″ custom_padding=”|||” global_colors_info=”{}” custom_padding__hover=”|||”][et_pb_code admin_label=”Write code Python” _builder_version=”4.16″ vertical_offset_tablet=”0″ horizontal_offset_tablet=”0″ z_index_tablet=”0″ box_shadow_horizontal_tablet=”0px” box_shadow_vertical_tablet=”0px” box_shadow_blur_tablet=”40px” box_shadow_spread_tablet=”0px” global_colors_info=”{}”]<\/p>\n
Write code (Python)<\/h2>\n
Not your programming language? Set your preferences<\/a> so we can display relevant code examples<\/pee>[\/et_pb_code][et_pb_code admin_label=”Code Sample” _builder_version=”4.16″ vertical_offset_tablet=”0″ horizontal_offset_tablet=”0″ z_index_tablet=”0″ box_shadow_horizontal_tablet=”0px” box_shadow_vertical_tablet=”0px” box_shadow_blur_tablet=”40px” box_shadow_spread_tablet=”0px” global_colors_info=”{}”]<\/p>\n
  #Add Phidgets libraryfrom Phidget22.Phidget import *from Phidget22.Net import *from Phidget22.Devices.DCMotor import *from Phidget22.Devices.DistanceSensor import *#Required for sleep statementimport time#Connect to your roverNet.addServer(\"\", \"192.168.100.1\", 5661, \"\", 0)#CreateleftMotors = DCMotor()rightMotors = DCMotor()sonar = DistanceSensor()#AddressleftMotors.setChannel(0)rightMotors.setChannel(1)#OpenleftMotors.openWaitForAttachment(5000)rightMotors.openWaitForAttachment(5000)sonar.openWaitForAttachment(5000)while(True):    print(\"Distance: \" + str(sonar.getDistance()) + \" mm\")    if(sonar.getDistance() < 200):        #Object detected! Stop motors        leftMotors.setTargetVelocity(0)        rightMotors.setTargetVelocity(0)    else:        #Move forward slowly (25% full speed)        leftMotors.setTargetVelocity(0.25)        rightMotors.setTargetVelocity(0.25)            #Wait for 250 milliseconds    time.sleep(0.25)  <\/code><\/pre>\n
[\/et_pb_code][\/et_pb_column_inner][\/et_pb_row_inner][et_pb_row_inner module_class=”ph-user-csharp” _builder_version=”4.16″ vertical_offset_tablet=”0″ horizontal_offset_tablet=”0″ z_index_tablet=”0″ box_shadow_horizontal_tablet=”0px” box_shadow_vertical_tablet=”0px” box_shadow_blur_tablet=”40px” box_shadow_spread_tablet=”0px” global_colors_info=”{}”][et_pb_column_inner saved_specialty_column_type=”2_3″ _builder_version=”4.16″ custom_padding=”|||” global_colors_info=”{}” custom_padding__hover=”|||”][et_pb_code admin_label=”Write code C#” _builder_version=”4.16″ vertical_offset_tablet=”0″ horizontal_offset_tablet=”0″ z_index_tablet=”0″ box_shadow_horizontal_tablet=”0px” box_shadow_vertical_tablet=”0px” box_shadow_blur_tablet=”40px” box_shadow_spread_tablet=”0px” global_colors_info=”{}”]<\/p>\n
Write code (C#)<\/h2>\n
Not your programming language? Set your preferences<\/a> so we can display relevant code examples<\/pee>[\/et_pb_code][et_pb_code admin_label=”Code Sample” _builder_version=”4.16″ vertical_offset_tablet=”0″ horizontal_offset_tablet=”0″ z_index_tablet=”0″ box_shadow_horizontal_tablet=”0px” box_shadow_vertical_tablet=”0px” box_shadow_blur_tablet=”40px” box_shadow_spread_tablet=”0px” global_colors_info=”{}”]<\/p>\n
  \/\/Add Phidgets Libraryusing Phidget22;namespace PhidgetsRover{    class Program{        static void Main(string[] args){            \/\/Connect to wireless rover            Net.AddServer(\"\", \"192.168.100.1\", 5661, \"\", 0);            \/\/Create            DCMotor leftMotors = new DCMotor();            DCMotor rightMotors = new DCMotor();            DistanceSensor sonar = new DistanceSensor();            \/\/Address            leftMotors.Channel = 0;            rightMotors.Channel = 1;            \/\/Open            leftMotors.Open(5000);            rightMotors.Open(5000);            sonar.Open(5000);            while (true) {                System.Console.WriteLine(\"Distance: \" + sonar.Distance + \" mm\");                if(sonar.Distance < 200) {                    \/\/Object detected! Stop motors                    leftMotors.TargetVelocity = 0;                    rightMotors.TargetVelocity = 0;                } else {                    \/\/Move forward slowly (25% full speed)                    leftMotors.TargetVelocity = 0.25;                    rightMotors.TargetVelocity = 0.25;                }                \/\/Wait for 250 milliseconds                System.Threading.Thread.Sleep(250);            }        }    }}  <\/code><\/pre>\n
[\/et_pb_code][\/et_pb_column_inner][\/et_pb_row_inner][et_pb_row_inner module_class=”ph-user-swift” _builder_version=”4.16″ vertical_offset_tablet=”0″ horizontal_offset_tablet=”0″ z_index_tablet=”0″ box_shadow_horizontal_tablet=”0px” box_shadow_vertical_tablet=”0px” box_shadow_blur_tablet=”40px” box_shadow_spread_tablet=”0px” global_colors_info=”{}”][et_pb_column_inner saved_specialty_column_type=”2_3″ _builder_version=”4.16″ custom_padding=”|||” global_colors_info=”{}” custom_padding__hover=”|||”][et_pb_code admin_label=”Write code Swift” _builder_version=”4.16″ vertical_offset_tablet=”0″ horizontal_offset_tablet=”0″ z_index_tablet=”0″ box_shadow_horizontal_tablet=”0px” box_shadow_vertical_tablet=”0px” box_shadow_blur_tablet=”40px” box_shadow_spread_tablet=”0px” global_colors_info=”{}”]<\/p>\n
Write code (Swift)<\/h2>\n
Not your programming language? Set your preferences<\/a> so we can display relevant code examples<\/pee>[\/et_pb_code][et_pb_code admin_label=”Instructions” _builder_version=”4.16″ vertical_offset_tablet=”0″ horizontal_offset_tablet=”0″ z_index_tablet=”0″ box_shadow_horizontal_tablet=”0px” box_shadow_vertical_tablet=”0px” box_shadow_blur_tablet=”40px” box_shadow_spread_tablet=”0px” global_colors_info=”{}”]NOTE:<\/strong> the code below assumes you’ve created a single button and linked it to an IBAction named moveRover<\/em><\/pee>[\/et_pb_code][et_pb_image src=”https:\/\/www.phidgets.com\/education\/wp-content\/uploads\/2020\/04\/rover-m3.jpg” _builder_version=”4.16″ vertical_offset_tablet=”0″ horizontal_offset_tablet=”0″ z_index_tablet=”0″ box_shadow_horizontal_tablet=”0px” box_shadow_vertical_tablet=”0px” box_shadow_blur_tablet=”40px” box_shadow_spread_tablet=”0px” global_colors_info=”{}”][\/et_pb_image][et_pb_code admin_label=”Code Sample” _builder_version=”4.16″ vertical_offset_tablet=”0″ horizontal_offset_tablet=”0″ z_index_tablet=”0″ box_shadow_horizontal_tablet=”0px” box_shadow_vertical_tablet=”0px” box_shadow_blur_tablet=”40px” box_shadow_spread_tablet=”0px” global_colors_info=”{}”]<\/p>\n
  import Cocoa\/\/Add Phidgets Libraryimport Phidget22Swiftclass ViewController: NSViewController {    @IBOutlet weak var sensorLabel: NSTextField!        \/\/Create    let leftMotors = DCMotor()    let rightMotors = DCMotor()    let distanceSensor = DistanceSensor()        override func viewDidLoad() {        super.viewDidLoad()        do{            \/\/Connect to wireless rover            try Net.addServer(serverName: \"\", address: \"192.168.100.1\", port: 5661, flags: 0)                        \/\/Address            try leftMotors.setChannel(0)            try rightMotors.setChannel(1)                        \/\/Subscribe to event            let _ = distanceSensor.distanceChange.addHandler(onDistanceChange)                        \/\/Open            try leftMotors.open()            try rightMotors.open()            try distanceSensor.open()                    }catch{            print(error)        }    }    func onDistanceChange(sender:DistanceSensor, distance:UInt32){        do{            if(distance < 200){                \/\/Object Detected!                try leftMotors.setTargetVelocity(0)                try rightMotors.setTargetVelocity(0)            }            else{                \/\/Move forward slowly (25% full speed)                try leftMotors.setTargetVelocity(0.25)                try rightMotors.setTargetVelocity(0.25)            }                        \/\/Update label            DispatchQueue.main.async {                self.sensorLabel.stringValue = String(distance) + \" mm\"            }        }catch{            print(error)        }    }}  <\/code><\/pre>\n
[\/et_pb_code][\/et_pb_column_inner][\/et_pb_row_inner][et_pb_row_inner disabled_on=”off|off|off” admin_label=”Row” _builder_version=”4.16″ global_colors_info=”{}”][et_pb_column_inner saved_specialty_column_type=”2_3″ _builder_version=”4.16″ custom_padding=”|||” global_colors_info=”{}” custom_padding__hover=”|||”][et_pb_code admin_label=”Wrong Direction?” _builder_version=”4.16″ vertical_offset_tablet=”0″ horizontal_offset_tablet=”0″ z_index_tablet=”0″ box_shadow_horizontal_tablet=”0px” box_shadow_vertical_tablet=”0px” box_shadow_blur_tablet=”40px” box_shadow_spread_tablet=”0px” global_colors_info=”{}”]<\/p>\n
Wrong Direction?<\/h2>\n
Remember, if your Rover is moving backwards instead of forwards, simply negate the Target Velocity.<\/pee>[\/et_pb_code][\/et_pb_column_inner][\/et_pb_row_inner][et_pb_row_inner disabled_on=”off|off|off” admin_label=”Row” module_id=”practice” _builder_version=”4.16″ vertical_offset_tablet=”0″ horizontal_offset_tablet=”0″ z_index_tablet=”0″ box_shadow_horizontal_tablet=”0px” box_shadow_vertical_tablet=”0px” box_shadow_blur_tablet=”40px” box_shadow_spread_tablet=”0px” global_colors_info=”{}”][et_pb_column_inner saved_specialty_column_type=”2_3″ _builder_version=”4.16″ custom_padding=”|||” global_colors_info=”{}” custom_padding__hover=”|||”][et_pb_code admin_label=”Practice” _builder_version=”4.16″ vertical_offset_tablet=”0″ horizontal_offset_tablet=”0″ z_index_tablet=”0″ box_shadow_horizontal_tablet=”0px” box_shadow_vertical_tablet=”0px” box_shadow_blur_tablet=”40px” box_shadow_spread_tablet=”0px” global_colors_info=”{}”]<\/p>\n
Practice<\/h2>\n
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    <\/p>\n
  1. Try modifying the speed of the rover and the object detection distance.  <\/li>\n
    <\/p>\n
  2. Instead of stopping when identifying an object, try backing up or turning.<\/li>\n
    <\/p>\n
  3. Modify the Sonar Phidget’s Data Interval so it updates every 100 milliseconds (10 times a second) instead of every 250 milliseconds (4 times a second). Modify your loop delay to reflect the new interval. Visit the Data Interval Advanced Lesson<\/a> for more information.<\/li>\n
    <\/ol>\n
    [\/et_pb_code][\/et_pb_column_inner][\/et_pb_row_inner][et_pb_row_inner disabled_on=”off|off|off” admin_label=”Row” module_id=”troubleshoot” _builder_version=”4.16″ vertical_offset_tablet=”0″ horizontal_offset_tablet=”0″ z_index_tablet=”0″ box_shadow_horizontal_tablet=”0px” box_shadow_vertical_tablet=”0px” box_shadow_blur_tablet=”40px” box_shadow_spread_tablet=”0px” global_colors_info=”{}”][et_pb_column_inner saved_specialty_column_type=”2_3″ _builder_version=”4.16″ custom_padding=”|||” global_colors_info=”{}” custom_padding__hover=”|||”][et_pb_toggle title=”Troubleshoot” admin_label=”Troubleshoot” _builder_version=”4.18.0″ vertical_offset_tablet=”0″ horizontal_offset_tablet=”0″ hover_enabled=”0″ title_text_shadow_horizontal_length_tablet=”0px” title_text_shadow_vertical_length_tablet=”0px” title_text_shadow_blur_strength_tablet=”1px” closed_title_text_shadow_horizontal_length_tablet=”0px” closed_title_text_shadow_vertical_length_tablet=”0px” closed_title_text_shadow_blur_strength_tablet=”1px” body_text_shadow_horizontal_length_tablet=”0px” body_text_shadow_vertical_length_tablet=”0px” body_text_shadow_blur_strength_tablet=”1px” body_link_text_shadow_horizontal_length_tablet=”0px” body_link_text_shadow_vertical_length_tablet=”0px” body_link_text_shadow_blur_strength_tablet=”1px” body_ul_text_shadow_horizontal_length_tablet=”0px” body_ul_text_shadow_vertical_length_tablet=”0px” body_ul_text_shadow_blur_strength_tablet=”1px” body_ol_text_shadow_horizontal_length_tablet=”0px” body_ol_text_shadow_vertical_length_tablet=”0px” body_ol_text_shadow_blur_strength_tablet=”1px” body_quote_text_shadow_horizontal_length_tablet=”0px” body_quote_text_shadow_vertical_length_tablet=”0px” body_quote_text_shadow_blur_strength_tablet=”1px” box_shadow_horizontal_tablet=”0px” box_shadow_vertical_tablet=”0px” box_shadow_blur_tablet=”40px” box_shadow_spread_tablet=”0px” text_shadow_horizontal_length_tablet=”0px” text_shadow_vertical_length_tablet=”0px” text_shadow_blur_strength_tablet=”1px” global_colors_info=”{}” sticky_enabled=”0″]<\/p>\n
      \n
    1. Your rover should drive in the direction that the Sonar Phidget is facing. If it isn’t, simply use negative values for your Target Velocity. This will make the motors spin the opposite direction!<\/li>\n<\/ol>\n
      If you are still having issues visit Advanced Troubleshooting<\/a><\/p>\n
      [\/et_pb_toggle][\/et_pb_column_inner][\/et_pb_row_inner][et_pb_row_inner admin_label=”Row” _builder_version=”4.16″ global_colors_info=”{}”][et_pb_column_inner saved_specialty_column_type=”2_3″ _builder_version=”4.16″ custom_padding=”|||” global_colors_info=”{}” custom_padding__hover=”|||”][et_pb_code admin_label=”ph-button-progress-ctn” _builder_version=”4.16″ vertical_offset_tablet=”0″ horizontal_offset_tablet=”0″ z_index_tablet=”0″ box_shadow_horizontal_tablet=”0px” box_shadow_vertical_tablet=”0px” box_shadow_blur_tablet=”40px” box_shadow_spread_tablet=”0px” global_colors_info=”{}”]<\/p>\n
              Back to Turn  <\/a>        Next: Challenge  <\/a><\/div>\n
      [\/et_pb_code][\/et_pb_column_inner][\/et_pb_row_inner][\/et_pb_column][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":"
      package phidgetsrover;\/\/Add Phidgets Libraryimport com.phidget22.*;public class PhidgetsRover { public static void main(String[] args) throws Exception { \/\/Connect to wireless rover Net.addServer(“”, “192.168.100.1”, 5661, “”, 0); \/\/Create DCMotor leftMotors = new DCMotor(); DCMotor rightMotors = new DCMotor(); DistanceSensor sonar = new DistanceSensor(); \/\/Address leftMotors.setChannel(0); rightMotors.setChannel(1); \/\/Open leftMotors.open(5000); rightMotors.open(5000); sonar.open(5000); while (true) { System.out.println(“Distance: ” + sonar.getDistance() […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":842,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"\r\n
      This is an example page. It's different from a blog post because it will stay in one place and will show up in your site navigation (in most themes). Most people start with an About page that introduces them to potential site visitors. It might say something like this:<\/p>\r\n\r\n
      \r\n
      Hi there! I'm a bike messenger by day, aspiring actor by night, and this is my website. I live in Los Angeles, have a great dog named Jack, and I like pi\u00f1a coladas. (And gettin' caught in the rain.)<\/p>\r\n<\/blockquote>\r\n\r\n
      ...or something like this:<\/p>\r\n\r\n
      \r\n
      The XYZ Doohickey Company was founded in 1971, and has been providing quality doohickeys to the public ever since. Located in Gotham City, XYZ employs over 2,000 people and does all kinds of awesome things for the Gotham community.<\/p>\r\n<\/blockquote>\r\n\r\n
      As a new WordPress user, you should go to your dashboard<\/a> to delete this page and create new pages for your content. Have fun!<\/p>\r\n","_et_gb_content_width":"","footnotes":""},"class_list":["post-981","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.phidgets.com\/education\/wp-json\/wp\/v2\/pages\/981","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.phidgets.com\/education\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.phidgets.com\/education\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.phidgets.com\/education\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.phidgets.com\/education\/wp-json\/wp\/v2\/comments?post=981"}],"version-history":[{"count":24,"href":"https:\/\/www.phidgets.com\/education\/wp-json\/wp\/v2\/pages\/981\/revisions"}],"predecessor-version":[{"id":9144,"href":"https:\/\/www.phidgets.com\/education\/wp-json\/wp\/v2\/pages\/981\/revisions\/9144"}],"up":[{"embeddable":true,"href":"https:\/\/www.phidgets.com\/education\/wp-json\/wp\/v2\/pages\/842"}],"wp:attachment":[{"href":"https:\/\/www.phidgets.com\/education\/wp-json\/wp\/v2\/media?parent=981"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}