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-- Test if a file exists using Lua posix https://github.com/rrthomas/luaposix.

local posix = require('posix')

-- Test if a file exists.
-- @param fname string
--   filename
-- @return boolean
--   true if file exists, false otherwise
--

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#-*- mode: nginx; mode: flyspell-prog; ispell-local-dictionary: "american" -*-
### fastcgi configuration for Drupal8.
## 1. Parameters.
fastcgi_param QUERY_STRING q=$uri&$args;
fastcgi_param REQUEST_METHOD $request_method;
fastcgi_param CONTENT_TYPE $content_type;
fastcgi_param CONTENT_LENGTH $content_length;

fastcgi_param SCRIPT_NAME $fastcgi_script_name;
fastcgi_param REQUEST_URI $request_uri;

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-- Playing with the nixio.fs library.

local nixiofs = require('nixio.fs')

-- Test if a file exists.
-- @param fname string
--   filename
-- @return boolean
--   true if file exists, false otherwise
--

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server {
    listen 80; # IPv4	  	
    listen [::]:80 ipv6only=on; # IPv6
  
    server_name ~^(?<thishost>[^.]+\.)?subdomain\.example\.com$;
    access_log off;

    location / {
        ## Resolve the upstream address using this DNS server or any other.
        ## Choose the one that suits you.

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## Here's the way to have Nginx return a robots.txt file that disallows all crawling by bots.
## This is useful for development and private sites.
location = /robots.txt {
    return 200 "User-agent: *\nDisallow: /\n";
}

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;; When we are in cdlatex mode then
;; rebind the TAB key so that pabbrev
;; -mode completions still work.
(when (and (boundp 'cdlatex-mode)
           (boundp 'pabbrev-mode)
           pabbrev-mode
           cdlatex-mode)
  (local-set-key '[f12] 'pabbrev-expand-maybe))

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-- Using LuaSQL for sqlite3 DB handling.

require('luasql.sqlite3')

local env = assert(luasql.sqlite3()) -- create the context
local conn = assert(env:connect("test.sqlite")) -- connect to the DB

-- Do some queries.
assert(conn:execute("CREATE TABLE IF NOT EXISTS tbl1(one varchar(10), two smallint)"))
assert(conn:execute("INSERT INTO tbl1 VALUES('hello!', 10)"))

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Your NodeMCU custom build finished successfully. You may now download the firmware:
- float: http://nodemcu-build.com/builds/nodemcu-dev-10-modules-2016-06-09-18-06-12-float.bin
- integer: http://nodemcu-build.com/builds/nodemcu-dev-10-modules-2016-06-09-18-06-12-integer.bin

This was built against the dev branch and includes the following modules: cjson, dht, file, gpio, mqtt, net, node, tmr, uart, wifi.
The files are guaranteed to be available for download for 24h.

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// Import the interface to Tessel hardware
var tessel = require('tessel');

//Install mqtt library using: npm install mqtt
var mqtt = require('mqtt');

var client = mqtt.connect({
  servers:[{'host':'mqtt.relayr.io'}],
  // Add your credentials here.
  username: "<my device ID>", // add your own

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/*
* Property: isOn
* Returns: boolean (true or false) if led is on
*
* Checks the led to see if it is on or not.
*/
if (led.isOn)
{
  console.log('The green LED is currently on.');
}