title: Setting IP address in Node-Red, to an UDP-out node
body: <p>My node-red flow includes an udp-out node with my computer's ip address. But this changes from time to time, so then I manually need to change it. The tooltip for the UDP-out node says to leave the address blank if you want to use msg.ip to set. </p>
  
  <p>How do I use msg.ip? I haven't find a solution to this. It keeps reporting udp address not set.</p>