diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..972c8ea
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "JT808.Protocol"]
+	path = /src/JT808.Protocol
+	url = https://github.com/SmallChi/JT808.git