Fix presence topic (#1238)

main/ZgatewayBT.ino

@@ -119,7 +119,7 @@ void pubBTMainCore(JsonObject& data, bool haPresenceEnabled = true) {
       data["id"] = data["uuid"];
     }
 #  endif
-    String topic = String(Base_Topic) + "home_presence/" + String(gateway_name);
+    String topic = String(mqtt_topic) + subjectHomePresence + String(gateway_name);
     Log.trace(F("Pub HA Presence %s" CR), topic.c_str());
     pub_custom_topic((char*)topic.c_str(), data, false);
   }

main/config_BT.h

@@ -132,7 +132,7 @@ bool hassPresence = HassPresence;
 #endif
 
 /*-------------------HOME ASSISTANT ROOM PRESENCE ----------------------*/
-#define subjectHomePresence "home_presence/" // will send Home Assistant room presence message to this topic (first part is same for all rooms, second is room name)
+#define subjectHomePresence "presence/" // will send Home Assistant room presence message to this topic (first part is same for all rooms, second is room name)
 
 #ifndef useBeaconUuidForPresence
 #  define useBeaconUuidForPresence false // //define true to use iBeacon UUID as for presence, instead of sender mac (random) address