johnnyfive-starterfun.js

var five = require("johnny-five");
var app = require('express')();
var http = require('http').Server(app);
var io = require('socket.io')(http);
var path = require('path');

var board = new five.Board();

app.get('/', function(req, res) {
  res.sendFile(path.resolve('index.html'));
});

board.on("ready", function() {
  var left = new five.Servo({pin: 11, type: "continuous"});
  var right = new five.Servo({pin: 10, invert: true, type: "continuous"});
  var servos = new five.Servos([left, right]);

//   // var commands = {
//   //   left: function() { left.cw();right.ccw(); },
//   //   right: function() { left.ccw();right.cw(); },
//   //   fwd: function(speed) { servos.cw(speed); },
//   //   rev: function(speed) { servos.ccw(speed); },
//   //   stop: function() { servos.stop(); }
//   // };

  var keys = {
    up: false,
    down: false,
    left: false,
    right: false
  };

  function resetMovements() {
    if (keys.up) {
      if (keys.left) {
        left.ccw(0.1);
        right.ccw(1);
      } else if (keys.right) {
        left.ccw(1);
        right.ccw(0.1);
      } else {
        left.ccw(1);
        right.ccw(1);
      }
    } else if (keys.down) {
      if (keys.left) {
        left.cw(0.1);
        right.cw(1);
      } else if (keys.right) {
        left.cw(1);
        right.cw(0.1);
      } else {
        left.cw(1);
        right.cw(1);
      }
    } else if (keys.left) {
      left.cw();
      right.ccw();
    } else if (keys.right) {
      left.ccw();
      right.cw();
    } else {
      servos.stop();
    }
  }

  io.on('connection', function(socket) {
    console.log('a user connected');
    socket.on('keydown', function(key) {
      keys[key] = true;
      resetMovements();
    });

    socket.on('keyup', function(key) {
      keys[key] = false;
      resetMovements();
    });
  });

  http.listen(3000, function(){
    console.log('listening on localhost:3000');
  });

});