diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..b27d8ce
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "tmtc_core"]
+	path = tmtc_core
+	url = https://git.ksat-stuttgart.de/irs/eive/tmtc_core.git
diff --git a/tmtc_core b/tmtc_core
new file mode 160000
index 0000000..3749440
--- /dev/null
+++ b/tmtc_core
@@ -0,0 +1 @@
+Subproject commit 3749440b9f1051b9d022f00012f1da417759fe32