diff --git a/src/W800_SDK_v1.00.10/app/ble/ble_service.c b/src/W800_SDK_v1.00.10/app/ble/ble_service.c
index 58f2610..4fa1640 100644
--- a/src/W800_SDK_v1.00.10/app/ble/ble_service.c
+++ b/src/W800_SDK_v1.00.10/app/ble/ble_service.c
@@ -112,15 +112,16 @@ static int ble_gatt_mtu_cb(uint16_t conn_handle, const struct ble_gatt_error *er
 
 const char *ble_service_state_2_str(ble_service_state_e state)
 {
-    switch(state) {
-            CASE_RETURN_STR(BLE_SERVICE_MODE_STOPPED)
-            CASE_RETURN_STR(BLE_SERVICE_MODE_IDLE)
-            CASE_RETURN_STR(BLE_SERVICE_MODE_ADVERTISING)
-            CASE_RETURN_STR(BLE_SERVICE_MODE_CONNECTED)
-            CASE_RETURN_STR(BLE_SERVICE_MODE_INDICATING)
-            CASE_RETURN_STR(BLE_SERVICE_MODE_EXITING)
+    switch(state) 
+    {
+        CASE_RETURN_STR(BLE_SERVICE_MODE_STOPPED)
+        CASE_RETURN_STR(BLE_SERVICE_MODE_IDLE)
+        CASE_RETURN_STR(BLE_SERVICE_MODE_ADVERTISING)
+        CASE_RETURN_STR(BLE_SERVICE_MODE_CONNECTED)
+        CASE_RETURN_STR(BLE_SERVICE_MODE_INDICATING)
+        CASE_RETURN_STR(BLE_SERVICE_MODE_EXITING)
         default:
-            return "unkown ble service state";
+            return "Unkown ble service state";
     }
 }
 
@@ -785,4 +786,4 @@ static void reset_data_being_sent(data_being_sent_t * const data)
     {
         memset(data, 0, sizeof(data_being_sent_t));
     }
-}
\ No newline at end of file
+}