diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..43c7529
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "Replay_Attacks/customer-assistance-buttons-sdr"]
+	path = Replay_Attacks/customer-assistance-buttons-sdr
+	url = https://github.com/jimilinuxguy/customer-assistance-buttons-sdr.git
diff --git a/Replay_Attacks/customer-assistance-buttons-sdr b/Replay_Attacks/customer-assistance-buttons-sdr
new file mode 160000
index 0000000..d0fd15d
--- /dev/null
+++ b/Replay_Attacks/customer-assistance-buttons-sdr
@@ -0,0 +1 @@
+Subproject commit d0fd15d7eaf4642c359fdd43865152dee72ca8b8