diff --git a/Project/applications/smartcities/include/timer-loop.h b/Project/applications/smartcities/include/timer-loop.h
new file mode 100644
index 0000000..0322566
--- /dev/null
+++ b/Project/applications/smartcities/include/timer-loop.h
@@ -0,0 +1,14 @@
+#include "libwismart.h"
+#include "libwismart_irqs.h"
+#include "lwip/inet.h"
+
+#define HALF_HOUR	60*3
+#define FIVE_MIN	60*1
+#define LONG_PERIOD		HALF_HOUR
+#define SHORT_PERIOD	FIVE_MIN
+
+unsigned int getSystemTime();
+
+unsigned int getElapsedTime(unsigned int t);
+
+void sleep_thread(unsigned int seconds);
\ No newline at end of file