Compass - Logger

Run with:

node eg/magnetometer-log.js

var chalk = require("chalk"),
  five = require("johnny-five"),
  board, colors, servo, mag, count, dirs, lock;

(board = new five.Board()).on("ready", function() {

    count = -1;
    dirs = ["cw", "ccw"];
    lock = false;

    [
      // Medium Speed Counter Clock Wise
      [92, "ccw"],
      // Medium Speed Clock Wise
      [88, "cw"]

    ].forEach(function(def) {

      // Define a directional method and default speed
      five.Servo.prototype[def[1]] = function(speed) {
        speed = speed || def[0];

        this.move(speed);
      };
    });


    // Create a new `servo` hardware instance.
    servo = new five.Servo({
      pin: 9,
      // `type` defaults to standard servo.
      // For continuous rotation servos, override the default
      // by setting the `type` here
      type: "continuous"
    });


    // Create an I2C `Magnetometer` instance
    mag = new five.Magnetometer();

    // Inject the servo and magnometer into the REPL
    this.repl.inject({
      servo: servo,
      mag: mag
    });

    // set the continuous servo to stopped
    servo.move(90);

    // As the heading changes, log heading value
    mag.on("headingchange", function() {
      var log;
      var color = colors[this.bearing.abbr];

      log = (this.bearing.name + " " + Math.floor(this.heading) + "°");

      console.log(
        chalk[color](log)
      );



      if (!lock && this.bearing.name === "North") {
        // Set redirection lock
        lock = true;

        // Redirect
        servo[dirs[++count % 2]]();

        // Release redirection lock
        board.wait(2000, function() {
          lock = false;
        });
      }
    });

    this.wait(2000, function() {
      servo[dirs[++count % 2]]();
    });
  });

colors = {
  N: "red",
  NbE: "red",
  NNE: "red",
  NEbN: "red",
  NE: "yellow",
  NEbE: "yellow",
  ENE: "yellow",
  EbN: "yellow",
  E: "green",
  EbS: "green",
  ESE: "green",
  SEbE: "green",
  SE: "green",
  SEbS: "cyan",
  SSE: "cyan",
  SbE: "cyan",
  S: "cyan",
  SbW: "cyan",
  SSW: "cyan",
  SWbS: "blue",
  SW: "blue",
  SWbW: "blue",
  WSW: "blue",
  WbS: "blue",
  W: "magenta",
  WbN: "magenta",
  WNW: "magenta",
  NWbW: "magenta",
  NW: "magenta",
  NWbN: "magenta",
  NNW: "magenta",
  NbW: "red"
};

Compass - Logger

License