Update README.md

README.md

@@ -25,6 +25,28 @@ npm install node-red-contrib-xiaomi-devices
 
 ## Usage
 
-Below a screenshot of an example use of all nodes.
+From the Xiaomi configurator screen add your different devices by selecting the type of device and a readable description. The readable discription is used on the different edit screen of the nodes to easily select the device you associate to the node.
 
-![Xiaomi devices example in node-red](https://github.com/hrietman/node-red-contrib-xiaomi-devices/blob/master/xiaomi-devices-overview.png)
+Tip: use the configurator from the side-panel (hamburger menu, configuration nodes) to manage your devices. Node-red doesn't update underlying edit screens if the configuration panel is opened / closed from the edit node screen. (If you do, you need to first close the edit node screen and reopen it by double-clicking the node you want to edit the properties for.)
+
+To receive/send json UDP messages from/to the gateway you need to enable the local LAN mode on the gateway. To receive the json UDP messages in node-red you need to add an udp-node with the correct configuration:
+
+```
+Listen for: multicast messages
+Group: 224.0.0.50
+Local ip: <empty>
+On port: 9898 ipv4
+Output: String
+```
+
+If you want to sent messages to the gateway you need to add an UDP sender, here an example configuration:
+
+```
+Send a: UDP message to port: 9898
+Address: <ip_of_your_gateway> ipv4
+```
+This configuration worked for me however I have seen people using different configuration to make UDP work.
+
+Here an example of how to use the different nodes.
+
+![Xiaomi devices example in node-red](https://raw.githubusercontent.com/hrietman/node-red-contrib-xiaomi-devices/master/xiaomi-devices-overview.png)