https-post.js

var tessel = require('tessel');
var https = require('https');
var querystring = require('querystring');

// Build the post string from an object
var post_data = querystring.stringify({
  'accel-x' : '1.24353',
  'accel-y': '-.543653',
  'accel-z': '0.021234',
});

// An object of options to indicate where to post to
var post_options = {
    host: '<HOST>.com',
    port: '80',
    path: '/<PATH>',
    method: 'POST',
    headers: {
        'Content-Type': 'application/x-www-form-urlencoded',
        'Content-Length': post_data.length
    }
};

// Set up the request
var post_req = https.request(post_options, function(res) {
    res.setEncoding('utf8');
    res.on('data', function (chunk) {
        console.log('Response: ' + chunk);
    });
});

// post the data
post_req.write(post_data);
post_req.end();