not able to connect to test.mosquitto.org
<p>I am working on esp8266 and trying to connect to test.mosquitto.org.
here is what I got from net</p>

<pre><code>m = mqtt.Client("clientid", 60, "user", "password")
m:on("connect", function(con) print ("connected") end)
m:on("offline", function(con) print ("offline") end)
m:on("message", function(conn, topic, data) 
  print(topic .. ":" ) 
  if data ~= nil then
    print(data)
  end
end)

m:connect("http://test.mosquitto.org/", 1883, 0, function(conn) print("connected") end)
m:subscribe("/topic",0, function(conn) print("subscribe success") end)
m:publish("/topic","hello",0,0, function(conn) print("sent") end)
m:close();
</code></pre>

<p>I am not sure from where to get clientId ,user and pass,</p>

<p>here what I am getting :
DNS retry 1!
DNS retry 2!
DNS retry 3!
DNS retry 4!
DNS Fail!</p>