diff --git a/app/include/common.h b/app/include/common.h
index 3e9567f..6bb0b1c 100755
--- a/app/include/common.h
+++ b/app/include/common.h
@@ -122,6 +122,7 @@ typedef enum _BOOT_MSG
     BOOT_DAU_ERR_RESET,
     BOOT_PPP_NO_FOUND,
     BOOT_PPP_FOUND_LINK_FAIL,
+    BOOT_TTYUSB_NO_FOUND,
     BOOT_MAX,
 } BOOT_MSG;
 
diff --git a/app/lib/a_process/ca_csg.c b/app/lib/a_process/ca_csg.c
index 85b1bea..018d4b5 100755
--- a/app/lib/a_process/ca_csg.c
+++ b/app/lib/a_process/ca_csg.c
@@ -349,7 +349,7 @@ int _csg_response_realtime_data(int sendtype)
     prtd->StartFlag1 = sysctrl.dev_hex_id;
     prtd->FarmeType = sendtype;
     prtd->RunSecCnt = t - sysctrl.start_time;
-    prtd->Local_Vbat = 6500;
+    prtd->Local_Vbat = pwr.vbat;
     prtd->RMS_Ia = cauValues[0];
     prtd->RMS_Ib = cauValues[1];
     prtd->RMS_Ic = cauValues[2];
diff --git a/app/lib/a_process/ca_network.c b/app/lib/a_process/ca_network.c
index afcebc5..f13cddd 100755
--- a/app/lib/a_process/ca_network.c
+++ b/app/lib/a_process/ca_network.c
@@ -343,8 +343,8 @@ int _network_ppp_check_test(void)
     FILE *Read_fp;
     int chars_read;
     char buffer[1000];
-    memset(buffer,0,1000);
-    memset(cmd,0,100);
+    memset(buffer,0,sizeof(buffer));
+    memset(cmd,0,sizeof(cmd));
     sprintf(cmd,"ifconfig | grep ppp0");
     Read_fp = popen(cmd,"r");
     if(Read_fp != NULL)
@@ -487,7 +487,7 @@ void *_network_manage_thread(void *args)
             if (++reset_cnt >= 6)
             {
                 reset_cnt = 0;
-                reboot_system(LOG_NETWORK, BOOT_PPP_NO_FOUND);
+                reboot_system(LOG_NETWORK, BOOT_TTYUSB_NO_FOUND);
             }
 
             _network_usb_4g_power_on();
diff --git a/app/lib/m_management/common.c b/app/lib/m_management/common.c
index 5595b9d..478cfa6 100755
--- a/app/lib/m_management/common.c
+++ b/app/lib/m_management/common.c
@@ -607,6 +607,7 @@ boot_msg_t g_bootmsg[] =
     {BOOT_DAU_ERR_RESET, "DAU communicate ERROR."},
     {BOOT_PPP_NO_FOUND, "ppp0 not found."},
     {BOOT_PPP_FOUND_LINK_FAIL, "ppp0 found but link failed."},
+    {BOOT_TTYUSB_NO_FOUND, "/dev/ttyUSB3 not found."},
     {BOOT_MAX, NULL}
 };