diff --git a/mbtk/liblynq_lib/src/lynq_time.c b/mbtk/liblynq_lib/src/lynq_time.c
old mode 100755
new mode 100644
index 5b59a18..b7a5d41
--- a/mbtk/liblynq_lib/src/lynq_time.c
+++ b/mbtk/liblynq_lib/src/lynq_time.c
@@ -85,9 +85,10 @@
 
 static void* ntp_pthread_run()
 {
-    // Waitting for network connected.
-    while(mbtk_net_state_get() == MBTK_NET_STATE_OFF) {
-        sleep(1);
+    if (mbtk_net_state_get() == MBTK_NET_STATE_OFF) 
+    {
+        printf("Network is disconnected. Set time fail.");
+        return NULL;
     }
     printf("Network is connected.");