diff --git a/utils.h b/utils.h
new file mode 100644
index 0000000..b44b396
--- /dev/null
+++ b/utils.h
@@ -0,0 +1,12 @@
+/*
+These are some utility functions and variables used through the main code
+*/ 
+#include <Arduino.h>
+#define MS_IN_MINUTE 60000
+#define US_IN_MINUTE 60000000
+
+int freeRam ();
+int AIRDEN();
+unsigned int PW();
+unsigned int PW_SD();
+unsigned int PW_AN();