Node.JS Myo script reflecting the detected hand poses

gistfile1.js

// Node version 0.10.33
// Myo SDK version 0.8.1

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//
//      NODE.JS EXPRESS START
//
//

var express = require('express');
var path = require('path');
var favicon = require('serve-favicon');
var logger = require('morgan');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');

var routes = require('./routes/index');
var users = require('./routes/users');


//
//
//      NODE.JS EXPRESS START
//
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//- - - - - - - - - - - - - - - - - - - -
//
//      MYO PART
//
//

// more info: https://github.com/stolksdorf/myo.js
var Myo = require('myo');


// I found these options somewhere online.
// Haven't fooled around with them extensively but on first glance they don't seem to have any influence...
var myo = Myo.create(0, {
    armbusy_threshold : 200,
    doubleTap: {
        time: [200, 300],
        threshold: 2.5
    }
});

var fistOn = false;     // used to hold fist state
var spreadOn = false;   // used to hold fingers_spread state

myo.on('connected', function() {
    console.log("myo connected");
});

myo.on('unlock', function(){
    console.log("unlocked");
});
myo.on('lock', function(){
    console.log("locked");
});


// Why doesn't double_tap register when using it to unlock?
// I know, chicken and egg, but feels more natural that it *would* trigger when unlocking
myo.on('double_tap', function (edge) {
    if (edge) {
        console.log("double tap ON");
    } else {
        console.log("double tap OFF");
    }
});


myo.on('fingers_spread', function(edge){
    if (edge) {
        console.log("fingers_spread ON");
        spreadOn = true;
    } else {
        console.log("fingers_spread OFF");
        spreadOn = false;
    }
});

myo.on('fist', function(edge){
    if (edge) {
        console.log("fist ON");
        fistOn = true;
    } else {
        console.log("fist OFF");
        fistOn = false;
    }
});


myo.on('wave_in', function(edge){
    if (edge) {
        console.log("wave_in ON");
    } else {
        console.log("wave_in OFF");
    }
});

myo.on('wave_out', function(edge){
    if (edge) {
        console.log("wave_out ON");
    } else {
        console.log("wave_out OFF");
    }
});

var checkKeepUnlocked = function() {
    if (spreadOn || fistOn) {
        myo.unlock(500);
    }
}
var keepMyoUnlockedInterval = setInterval(checkKeepUnlocked, 1000 / 25);



//
//
//      MYO PART
//
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//- - - - - - - - - - - - - - - - - - - -
//
//      EXPRESS CONFIGURING
//
//

var app = express();

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');

// uncomment after placing your favicon in /public
//app.use(favicon(__dirname + '/public/favicon.ico'));
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

app.use('/', routes);
app.use('/users', users);

// catch 404 and forward to error handler
app.use(function(req, res, next) {
    var err = new Error('Not Found');
    err.status = 404;
    next(err);
});

// error handlers

// development error handler
// will print stacktrace
if (app.get('env') === 'development') {
    app.use(function(err, req, res, next) {
        res.status(err.status || 500);
        res.render('error', {
            message: err.message,
            error: err
        });
    });
}

// production error handler
// no stacktraces leaked to user
app.use(function(err, req, res, next) {
    res.status(err.status || 500);
    res.render('error', {
        message: err.message,
        error: {}
    });
});

//
//
//      EXPRESS CONFIGURING
//
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module.exports = app;