diff --git a/libraries/includes/defines.h b/libraries/includes/defines.h
index 39c930d..419a730 100644
--- a/libraries/includes/defines.h
+++ b/libraries/includes/defines.h
@@ -7,7 +7,7 @@
 #define U_ADC_IN 4
 #define LED_BLUE 45
 
-#define SEND_PERIOD 15000 // ms
+#define SEND_PERIOD 900000 // ms
 #define LABEL_LENGTH 5
 #define NUM_OF_SENSORS 4