--- a/thermferm/mqtt.h	Thu Jul 19 12:55:40 2018 +0200
+++ b/thermferm/mqtt.h	Thu Jul 19 14:08:32 2018 +0200
@@ -17,6 +17,12 @@
 void mqtt_disconnect(void);
 
 /**
+ * @brief Publish DBIRTH for all active units. If there are no active units, don't
+ *        publish anything. This function should be called at program start.
+ */
+void publishDBirthAll(void);
+
+/**
  * @brief Publish unit data.
  * @param unit Unit data structure.
  */