diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..1b838cf
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "Adafruit"]
+	path = Adafruit
+	url = https://github.com/AmedeeBulle/ttn-mapper.git
diff --git a/Adafruit b/Adafruit
new file mode 160000
index 0000000..eadef17
--- /dev/null
+++ b/Adafruit
@@ -0,0 +1 @@
+Subproject commit eadef178a8cef9ab29397caa4c9fcb108f09d92a