title: How to discover a DHCP ip of an arduino in local network with javascript
body: <p>I'm using an arduino UNO and an Ethernet Shield to create a web server to response HTTP requests.</p>
  
  <p>The requests are sent by ajax XMLHttpRequest.</p>
  
  <p>It's working fine with static ip address.
  But a want the arduindo to get a DHCP ip, so I can use it in any local network (with DHCP).</p>
  
  <p>I want to discover the ip of the arduino connected on the local network.
  So I can use it as url to send HTTP requests.</p>
  
  <p>Is it possible to do that in javascript?</p>