diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..002b941
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "thermo_sensor/common_esp32"]
+	path = thermo_sensor/common_esp32
+	url = git@code.yggdrasil.mpiecuch.pl:mateusz/common_esp32.git
diff --git a/thermo_sensor/main/thermo_sensor.c b/thermo_sensor/main/thermo_sensor.c
index d2d1cb8..0986269 100644
--- a/thermo_sensor/main/thermo_sensor.c
+++ b/thermo_sensor/main/thermo_sensor.c
@@ -37,7 +37,8 @@ void app_main()
     // sector - typically 4096B
     esp_err_t ret = nvs_flash_init();
 
-    if (ret == ESP_ERR_NVS_NO_FREE_PAGES || ret == ESP_ERR_NVS_NEW_VERSION_FOUND) {
+    if (ret == ESP_ERR_NVS_NO_FREE_PAGES || 
+        ret == ESP_ERR_NVS_NEW_VERSION_FOUND) {
         // ESP_ERR_NVS_NEW_VERSION_FOUND - NVS header page is
         // stored in newer version (newer IDF) than version
         // it is used by this application