Merge branch 'master' of https://github.com/thelsing/knx

src/knx/bau_systemB.cpp

@@ -45,6 +45,9 @@ void BauSystemB::enabled(bool value)
 
 void BauSystemB::sendNextGroupTelegram()
 {
+    if(!configured())
+        return;
+    
     static uint16_t startIdx = 1;
 
     GroupObjectTableObject& table = _groupObjTable;

src/knx/group_object.h

@@ -19,7 +19,7 @@ enum ComFlag
 
 class GroupObject;
 
-#if __has_include(<functional>)
+#ifdef __linux__
 #include <functional>
 typedef std::function<void(GroupObject&)> GroupObjectUpdatedHandler;
 #else