diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..9a96ab3
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "lib/nanomodbus"]
+	path = lib/nanomodbus
+	url = ../nanoMODBUS.git
diff --git a/lib/nanomodbus b/lib/nanomodbus
new file mode 160000
index 0000000..469b5e8
--- /dev/null
+++ b/lib/nanomodbus
@@ -0,0 +1 @@
+Subproject commit 469b5e88319a303e1231890af06f2634b825eb27