diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..2f6f845
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,9 @@
+[submodule "arduino/libraries/ArduinoJson"]
+	path = arduino/libraries/ArduinoJson
+	url = git@github.com:daniviga/ArduinoJson.git
+[submodule "arduino/libraries/Ethernet"]
+	path = arduino/libraries/Ethernet
+	url = git@github.com:daniviga/Ethernet.git
+[submodule "arduino/libraries/NTPClient"]
+	path = arduino/libraries/NTPClient
+	url = git@github.com:daniviga/NTPClient.git
diff --git a/arduino/libraries/ArduinoJson b/arduino/libraries/ArduinoJson
new file mode 160000
index 0000000..6fb52c3
--- /dev/null
+++ b/arduino/libraries/ArduinoJson
@@ -0,0 +1 @@
+Subproject commit 6fb52c363849557c69485f97110371d0a4454432
diff --git a/arduino/libraries/Ethernet b/arduino/libraries/Ethernet
new file mode 160000
index 0000000..7b5ee58
--- /dev/null
+++ b/arduino/libraries/Ethernet
@@ -0,0 +1 @@
+Subproject commit 7b5ee58ba50ae28341111e4641d35076080b8597
diff --git a/arduino/libraries/NTPClient b/arduino/libraries/NTPClient
new file mode 160000
index 0000000..b6aa6af
--- /dev/null
+++ b/arduino/libraries/NTPClient
@@ -0,0 +1 @@
+Subproject commit b6aa6afe6896c886b15d7c833869f29b97caf48e