- will now publish a non-retained message to topic/status/authrequired

if authentication is required.

README.md

@@ -84,6 +84,10 @@ Like all applications connecting to a Hue bridge, hue2mqtt needs to be authentic
 at least once. The bridge will then assign a whitelist username (in fact a token) which is automatically
 used on subsequent connections. The token is stored using Java Preferences. 
 
+When authentication is required, a one-shot not retained message is published to topic
+
+	hue/status/authrequired
+
 
 ### Available options:    
 
@@ -101,7 +105,7 @@ used on subsequent connections. The token is stored using Java Preferences.
 
 - mqtt.clientid
 
-  ClientID to use in the MQTT connection. Defaults to "knx2mqtt".
+  ClientID to use in the MQTT connection. Defaults to "hue".
 
 - mqtt.topic
 
@@ -121,8 +125,9 @@ Dependencies
 History
 -------
 * 0.12 - 2016/06/11 - owagner
-  - will now always go through bridge recovery. Bridges can be specified using either their ID (preferred) or IP.
+  - will now always go through bridge discovery. Bridges can be specified using either their ID (preferred) or IP.
     Username is stored per ID.
+  - will now publish a non-retained message to topic/status/authrequired if authentication is required.
 
 * 0.11 - 2016/05/28 - owagner/hobbyquaker
   - adapted to new 1.8.1+ API scheme of whitelist usernames being assigned by the bridge.

src/main/java/com/tellerulam/hue2mqtt/HueHandler.java

@@ -130,6 +130,7 @@ public void onAuthenticationRequired(PHAccessPoint pap)
 	{
 		L.severe("IMPORTANT! AUTHENTICATION REQUIRED -- press the button on your Hue Bridge "+pap.getIpAddress()+" within 30s to authenticate hue2mqtt!");
 		phHueSDK.startPushlinkAuthentication(pap);
+		MQTTHandler.notifyAuthRequired();
 	}
 
 	private void reportGroups(PHBridgeResourcesCache cache)

src/main/java/com/tellerulam/hue2mqtt/MQTTHandler.java

@@ -389,4 +389,16 @@ public static void setHueConnectionState(boolean connected)
 		}
 	}
 
+	public static void notifyAuthRequired()
+	{
+		try
+		{
+			instance.mqttc.publish(instance.topicPrefix+"status/authrequired","1".getBytes(),1,false);
+		}
+		catch(MqttException e)
+		{
+			/* Ignore */
+		}
+	}
+
 }