diff --git a/.gitmodules b/.gitmodules
index a2e2556..449e10b 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,7 @@
 [submodule "bacnet_stack"]
 	path = bacnet_stack
 	url = https://git.tonycloud.org/dali/bacnet_stack.git
+[submodule "knx"]
+	path = knx
+	url = https://git.tonycloud.org/knx/knx.git
+	branch = v1
diff --git a/knx b/knx
new file mode 160000
index 0000000..7124a64
--- /dev/null
+++ b/knx
@@ -0,0 +1 @@
+Subproject commit 7124a6435ddca51c36279c748da2df1ea9b877b9