diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..2def10d
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "controller/ethersex"]
+	path = controller/ethersex
+	url = git://github.com/volkszaehler/ethersex.git
diff --git a/controller/ethersex b/controller/ethersex
new file mode 160000
index 0000000..b067fbc
--- /dev/null
+++ b/controller/ethersex
@@ -0,0 +1 @@
+Subproject commit b067fbc0d34e10bad8c1ee1743757718f79f3025