diff --git a/.gitmodules b/.gitmodules
index e871764..bb381e5 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -4,3 +4,7 @@
 [submodule "cube/libmbus"]
 	path = cube/libmbus
 	url = https://github.com/wollud1969/libmbus.git
+[submodule "cube/ioLibrary_Driver"]
+	path = cube/ioLibrary_Driver
+	url = ../ioLibrary_Driver
+	branch = WolfgangsOwnBranch
diff --git a/cube/ioLibrary_Driver b/cube/ioLibrary_Driver
new file mode 160000
index 0000000..cae27e3
--- /dev/null
+++ b/cube/ioLibrary_Driver
@@ -0,0 +1 @@
+Subproject commit cae27e3acb0f86accb66a61bd01e73773ee903bf