By Wei Lu
This ebook will express you the adaptation among creating a robotic movement and creating a robotic imagine. utilizing Mindstorms EV3 and LeJOS―an open resource undertaking for Java Mindstorms projects―you’ll the right way to create man made Intelligence to your bot. Your robotic will the best way to challenge resolve, how one can plan, the right way to research, and the way to speak. alongside the way in which, you’ll know about classical AI algorithms for educating find out how to imagine, algorithms so you might then follow in your personal robot inspirations. If you’ve ever desired to know about robot intelligence in a pragmatic, playful method, starting Robotics Programming in Java with LEGO Mindstorms is for you. What you’ll examine construct your first LEGO EV3 robotic step by step set up LeJOS and its firmware on Lego EV3 Create and add your first Java software into Lego EV3 LeJOS API services Java Programming for automobiles Robotics habit Programming with Sensors universal AI Algorithms like DFS, BFS, and Dijkstra’s set of rules Java Multithreading Programming with Lego EV3 Who this booklet is for college students, academics, and makers with easy Java programming event who are looking to easy methods to practice man made Intelligence to a pragmatic robot method. desk of Contents creation to Lego Mindstorms and leJOS advent to Motor Sensors Controlling Wheeled automobiles Coordinators and Navigator API Depth-First seek set of rules and Its Implementation with Lego EV3 Breadth-First seek and Its Implementation with Lego Mindstorms Hill-Climbing seek and Its Implementation with Lego Mindstorms Dijkstra’s set of rules and Its Implementation with Lego Mindstorms The A* seek set of rules and Its Implementation with Lego Mindstorms Introducing the contact Sensor and Ultrasonic Sensor Introducing the sunshine Sensor and colour Sensor advent to behaviour Programming Multithreading Programming with Java leJOS
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97 cm/sec while traveling forward at 1 revolution per second. 97 cm/sec. Other Motor Methods There are many other methods provided with the EV3 large motors. Some of these methods are explained in Table 2-6: Table 2-6. Other Methods Method Function boolean isMoving() This method is useful to test if the motor has finished rotating. isMoving() returns true when the motor is moving for any reason. For example, if a forward() or backward() method has been called, or if a rotate() task is in progress.
Due to the inertia of the motors, you will find out that the motor does not stop immediately after you call the method stop(). New methods used in this program include those shown in Table 2-2: Table 2-2. Methods Used in Tachometer Class Method Function EV3LargeRegulatedMotor getTachoCount () Gets the motor angle in number of degrees. resetTachoCount () Resets the counter number to 0. setSpeed(int speed) Sets up the rotation speed in number of degrees per second. getRotationSpeed() Gets the actual speed of motor in number of degrees per second.
Eclipse will automatically look for the EV3_HOME environment variable to locate leJOS EV3. Check to make sure that the preferences are what you like. Select Windows -> Preferences and then leJOS EV3 from the list. If the leJOS EV3 directory is not correct, either type in the location or browse to it. Make sure that you browse to the main directory and not one of its subdirectories. After that, you need to double-check if they are the same as the items illustrated in Figure 1-23. 19 CHAPTER 1 ■ INTRODUCTION TO LEGO MINDSTORMS AND LEJOS Figure 1-23.