Tutorial.RobotCompass History

Hide minor edits - Show changes to markup

May 18, 2013, at 08:00 AM by Scott Fitzgerald -
Changed lines 32-103 from:
to:
May 17, 2013, at 06:23 PM by David Cuartielles -
Changed lines 108-109 from:
to:
May 17, 2013, at 09:29 AM by Scott Fitzgerald -
Changed lines 5-8 from:

The robot has an on-board compass module, with which it can tell the precise direction. This sketch will make sure the robot goes towards a certain direction, so long there're no magnets around.

Hold the robot with your hands and turn it. You will see on the screen what the robot measures.

to:

The robot has a compass module, which it uses to find its direction. This sketch will make sure the robot goes towards a certain direction.

When you hold the robot in your hands and rotate, you will the screen change, indicating direction.

NB : magnets will interfere with the compass. If you're getting unexpected results, check to make sure there are none around.

Changed lines 18-22 from:
  1. Place the robot on the ground
  2. After the starting screen, a graph will show up on the screen, representing a compass
  3. The robot will start exploring towards a persistent direction. If you push it out of its direction, it'll turn around in a curve
  4. If you want to change the robot's heading direction, look for the line int direc=180; at the beginning of the code. Change the value to another number, between 0 and 359. Try again and see where the robot is heading this time!
to:
  1. Place the robot on the ground.
  2. After the starting screen, a graph will appear on-screen, representing the compass
  3. The robot will start moving in a direction (in this example, it will sart heading south). If you move it in a different direction, it will turn back to the way it wants to move.
  4. If you want to change the robot's heading, in the code, look for int direc=180 at the beginning of the code. Change this value to another number, between 0 and 359. 0 represents north, 90 is east, 180 is south, and 270 is west. Where do you want to go?
May 15, 2013, at 01:01 PM by Scott Fitzgerald -
Changed lines 31-100 from:

place the actual code in here

to:

/* Robot Compass

 The robot has an on-board compass module, with
 which it can tell the direction the robot is 
 facing. This sketch will make sure the robot 
 goes towards a certain direction. 

 Beware, magnets will interfere with the compass
 readings.

 Circuit:
 * Arduino Robot

 created 1 May 2013
 by X. Yang
 modified 12 May 2013
 by D. Cuartielles

 This example is in the public domain
 */

// include the robot library

  1. include <ArduinoRobot.h>

int speedLeft; int speedRight; int compassValue; int direc = 180; //Direction the robot is heading

void setup() {

  // initialize the modules
  Robot.begin();
  Robot.beginTFT();
  Robot.beginSD();
  Robot.displayLogos();

}

void loop() {

  // read the compass orientation
  compassValue = Robot.compassRead();

  // how many degrees are we off
  int diff = compassValue-direc;

  // modify degress 
  if(diff > 180)
    diff = -360+diff;
  else if(diff < -180)
    diff = 360+diff;

  // Make the robot turn to its proper orientation
  diff = map(diff, -180, 180, -255, 255);

  if(diff > 0) {
    // keep the right wheel spinning, 
    // change the speed of the left wheel 
    speedLeft = 255-diff;
    speedRight = 255;
  } else {
    // keep the right left spinning,
    // change the speed of the left wheel   
    speedLeft = 255;
    speedRight = 255+diff;
  }
  // write out to the motors
  Robot.motorsWrite(speedLeft, speedRight);

  // draw the orientation on the screen
  Robot.drawCompass(compassValue);

}

May 10, 2013, at 02:43 PM by Xun Yang -
Added lines 14-20:

Instruction

  1. Upload the example, unplug USB and turn on power.
  2. Place the robot on the ground
  3. After the starting screen, a graph will show up on the screen, representing a compass
  4. The robot will start exploring towards a persistent direction. If you push it out of its direction, it'll turn around in a curve
  5. If you want to change the robot's heading direction, look for the line int direc=180; at the beginning of the code. Change the value to another number, between 0 and 359. Try again and see where the robot is heading this time!
Deleted lines 34-40:

Instruction

  1. Upload the example, unplug USB and turn on power.
  2. Place the robot on the ground
  3. After the starting screen, a graph will show up on the screen, representing a compass
  4. The robot will start exploring towards a persistent direction. If you push it out of its direction, it'll turn around in a curve
  5. If you want to change the robot's heading direction, look for the line int direc=180; at the beginning of the code. Change the value to another number, between 0 and 359. Try again and see where the robot is heading this time!
May 10, 2013, at 02:42 PM by Xun Yang -
Changed lines 28-34 from:
to:

Instruction

  1. Upload the example, unplug USB and turn on power.
  2. Place the robot on the ground
  3. After the starting screen, a graph will show up on the screen, representing a compass
  4. The robot will start exploring towards a persistent direction. If you push it out of its direction, it'll turn around in a curve
  5. If you want to change the robot's heading direction, look for the line int direc=180; at the beginning of the code. Change the value to another number, between 0 and 359. Try again and see where the robot is heading this time!
Changed line 42 from:
to:
May 03, 2013, at 11:35 AM by Xun Yang -
Changed lines 1-2 from:

Examples > Lottie Lemon?

to:

Examples > Robot

May 03, 2013, at 06:40 AM by David Cuartielles -
Added lines 1-36:

Share