diff --git a/Core/Src/sys_app.c b/Core/Src/sys_app.c
index afd0327..2839e9d 100644
--- a/Core/Src/sys_app.c
+++ b/Core/Src/sys_app.c
@@ -122,7 +122,8 @@ void SystemApp_Init(void)
   /*Init low power manager*/
   UTIL_LPM_Init();
   /* Disable Stand-by mode */
-  UTIL_LPM_SetOffMode((1 << CFG_LPM_APPLI_Id), UTIL_LPM_DISABLE);
+  //UTIL_LPM_SetOffMode((1 << CFG_LPM_APPLI_Id), UTIL_LPM_DISABLE);
+  UTIL_LPM_SetOffMode((1 << CFG_LPM_APPLI_Id), UTIL_LPM_ENABLE);
 
 #if defined (LOW_POWER_DISABLE) && (LOW_POWER_DISABLE == 1)
   /* Disable Stop Mode */
diff --git a/LoRaWAN/App/lora_app.h b/LoRaWAN/App/lora_app.h
index fa9153a..a83ec96 100644
--- a/LoRaWAN/App/lora_app.h
+++ b/LoRaWAN/App/lora_app.h
@@ -71,7 +71,7 @@ extern "C" {
 /*!
  * LoRaWAN default class
  */
-#define LORAWAN_DEFAULT_CLASS                       CLASS_C
+#define LORAWAN_DEFAULT_CLASS                       CLASS_A
 
 /*!
  * LoRaWAN default confirm state