diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..f788d3b
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "devices/rpi4_gupje"]
+	path = devices/rpi4_gupje
+	url = https://github.com/EljakimHerrewijnen/rpi4_gupje.git
diff --git a/devices/rpi4_gupje b/devices/rpi4_gupje
new file mode 160000
index 0000000..e82766b
--- /dev/null
+++ b/devices/rpi4_gupje
@@ -0,0 +1 @@
+Subproject commit e82766b0c940b35675aea4f9b0e69aaa1d21f1d8
diff --git a/docs/source/getting_started.rst b/docs/source/getting_started.rst
index 20b5f5b..2443ee6 100644
--- a/docs/source/getting_started.rst
+++ b/docs/source/getting_started.rst
@@ -6,7 +6,7 @@ Clone gupje somewhere on your system:
 
 .. code-block:: bash
 
-    git clone https://git.herreweb.nl/EljakimHerrewijnen/Gupje
+    git clone --recursive https://git.herreweb.nl/EljakimHerrewijnen/Gupje
 
 
 Cross compiler