diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..0fdcee0
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "fan-controller/home-assistant/core"]
+	path = fan-controller/home-assistant/core
+	url = https://github.com/home-assistant/core.git
diff --git a/fan-controller/home-assistant/core b/fan-controller/home-assistant/core
new file mode 160000
index 0000000..0409c05
--- /dev/null
+++ b/fan-controller/home-assistant/core
@@ -0,0 +1 @@
+Subproject commit 0409c05265eb67f7116e37e6f0fdface3f1d9616