diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..60ee2ef
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "sdk"]
+	path = sdk
+	url = zwsd@192.168.1.3:manufacturer_stm32/iflytop_stm32_os_sdk.git
diff --git a/sdk b/sdk
new file mode 160000
index 0000000..ecff87c
--- /dev/null
+++ b/sdk
@@ -0,0 +1 @@
+Subproject commit ecff87c8d8d92f48420354d99a6102168e3caa38