diff --git a/include/defaults.h b/include/defaults.h
new file mode 100644
index 0000000..a067eec
--- /dev/null
+++ b/include/defaults.h
@@ -0,0 +1,3 @@
+#pragma once
+
+#define SERIAL_BAUDRATE 115200
\ No newline at end of file
diff --git a/src/main.cpp b/src/main.cpp
index c0aaf9f..3ed2e11 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1,8 +1,23 @@
+#include "defaults.h"
 #include <Arduino.h>
+#include <LittleFS.h>
 
 void setup()
 {
-    // put your setup code here, to run once:
+    // Initialize serial output
+    Serial.begin(SERIAL_BAUDRATE);
+    while (!Serial)
+        yield();
+    Serial.println();
+    Serial.println(F("Starting OpenDTU"));
+
+    // Initialize file system
+    Serial.print(F("Initialize FS... "));
+    if (!LITTLEFS.begin()) {
+        Serial.println(F("failed"));
+    } else {
+        Serial.println(F("done"));
+    }
 }
 
 void loop()