diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..fda2b12
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "rts-sim-testing-message"]
+	path = rtss-proto-msg
+	url = https://gitea.joylink.club/joylink/rtss-proto-msg.git