diff --git a/mbtk/mbtk_gnssd/gnss_hd8122.c b/mbtk/mbtk_gnssd/gnss_hd8122.c
index e61bfe6..531bbcc 100755
--- a/mbtk/mbtk_gnssd/gnss_hd8122.c
+++ b/mbtk/mbtk_gnssd/gnss_hd8122.c
@@ -29,6 +29,9 @@
 #include "hd8122_dl/hd8040_upgrade.h"
 #include "agps/agnss_http_download.h"
 #include "agps/8122_agnss.h"
+#include "mbtk_utils.h"
+// #include "hd8122_dl/port.h"
+
 
 #define UART_BITRATE_NMEA_DEF_FW    115200   // Default bitrate.
 #define GNSS_POWER_GPIO 43
@@ -64,7 +67,7 @@
 static int gnss_cmd_rsp_len = 0;
 
 int gnss_write(int fd, const void *data, int data_len);
-int OpenUart(char* UART_DEV);
+int OpenUart(const char* UART_DEV);
 int uart_close(int fd);
 int fw_update_boot(int uart_fd, uint8_t *data, uint32_t len);
 
@@ -150,6 +153,7 @@
     }
 }
 
+#if 0
 static int msg_remove(uint8 gid, uint8 sid)
 {
     int i = msg_find(gid, sid);
@@ -165,6 +169,7 @@
         return -1;
     }
 }
+#endif
 
 static int msg_count()
 {
@@ -382,7 +387,7 @@
 
 static void gnss_cmd_rsp_process(const void *data, int data_len)
 {
-    const char *ptr = (const char*)data;
+//    const char *ptr = (const char*)data;
     log_hex("RSP", data, data_len);
 
     hd8122_id_ack_enum ack_nak = HD8122_ID_ACK_ACK;
@@ -406,7 +411,7 @@
             pthread_mutex_unlock(&read_mutex);
             setting_waitting = FALSE;
         }
-        
+
     }
     else
     {
@@ -557,7 +562,7 @@
     return GNSS_ERR_OK;
 }
 
-
+#if 0
 static gnss_err_enum gnss_8122_nmeaver(int fd, uint8 ver)
 {
     uint8 buff[GNSS_PACK_BUFF_SIZE];
@@ -572,18 +577,19 @@
     gnss_write(fd, buff, len);
     return GNSS_ERR_OK;
 }
+#endif
 
 int gnss_8122_dev_open()
 {
     //return mbtk_gpio_value_set(GNSS_POWER_GPIO, MBTK_GPIO_DIRECT_OUT, 1);
-    system("i2cset -y -f 2 0x31 0x15 0x86");
+    mbtk_system("i2cset -y -f 2 0x31 0x15 0x86");
     return 0;
 }
 
 int gnss_8122_dev_close(int fd)
 {
     //return mbtk_gpio_value_set(GNSS_POWER_GPIO, MBTK_GPIO_DIRECT_OUT, 0);
-    system("i2cset -y -f 2 0x31 0x15 0x00");
+    mbtk_system("i2cset -y -f 2 0x31 0x15 0x00");
     return 0;
 }
 
@@ -649,7 +655,7 @@
         LOGE("gnss_fwdl_enable fail");
         goto error;
     }
-    
+
     int ret = fw_update_boot(uart_fd, g_bin_buff, len);
     if (ret < 0)
     {
@@ -665,7 +671,7 @@
         LOGD("upgrade FAIL, fail style:%d", ret);
         goto error;
     }
-    
+
     if(gnss_8122_dev_close(0))
     {
         LOGE("close gnss device fail:%d", errno);
@@ -700,32 +706,32 @@
     int eph_type = 0;
     int alam_flag = 0;
     int ret = -1;
-    char url[256] = {0};
+    char url[1024] = {0};
     if(2 == sscanf(param, "%d,%d", &eph_type, &alam_flag))
     {
         if((gnss_eph_data_enum)eph_type == GNSS_EPH_GPS)
         {
-            snprintf(url, 256,AGNSS_URL, AGNSS_EPH_GPS);
+            snprintf(url, sizeof(url),AGNSS_URL, AGNSS_EPH_GPS);
         }
         else if((gnss_eph_data_enum)eph_type == GNSS_EPH_BDS)
         {
-            snprintf(url, 256,AGNSS_URL, AGNSS_EPH_BDS);
+            snprintf(url, sizeof(url),AGNSS_URL, AGNSS_EPH_BDS);
         }
         else if((gnss_eph_data_enum)eph_type == GNSS_EPH_GLO)
         {
-            snprintf(url, 256,AGNSS_URL, AGNSS_EPH_GLO);
+            snprintf(url, sizeof(url),AGNSS_URL, AGNSS_EPH_GLO);
         }
         else if((gnss_eph_data_enum)eph_type == GNSS_EPH_GPS_BDS)
         {
-            snprintf(url, 256,AGNSS_URL, AGNSS_EPH_GPS_BDS);
+            snprintf(url, sizeof(url),AGNSS_URL, AGNSS_EPH_GPS_BDS);
         }
         else if((gnss_eph_data_enum)eph_type == GNSS_EPH_GPS_GLO)
         {
-            snprintf(url, 256,AGNSS_URL, AGNSS_EPH_GPS_GLO);
+            snprintf(url, sizeof(url),AGNSS_URL, AGNSS_EPH_GPS_GLO);
         }
         else if((gnss_eph_data_enum)eph_type == GNSS_EPH_CFG)
         {
-            snprintf(url, 256,"%s?compid=%s&token=%s", strlen(agps_info.host) > 0 ? agps_info.host : "http://uagnss.allystar.com:80/ephemeris/HD_GPS.hdb",
+            snprintf(url, sizeof(url),"%s?compid=%s&token=%s", strlen(agps_info.host) > 0 ? agps_info.host : "http://uagnss.allystar.com:80/ephemeris/HD_GPS.hdb",
                                                         strlen(agps_info.id) > 0 ? agps_info.id : "yikecs1",
                                                         strlen(agps_info.passwd) > 0 ? agps_info.passwd : "Z38w5urAuawubTxi");
         }
@@ -767,7 +773,7 @@
 
 void gnss_8122_set_cb(const void *data, int data_len)
 {
-    const char *buff = (const char*)data;
+//    const char *buff = (const char*)data;
     if(setting_busy)   // Has setting cmd process.
     {
         gnss_cmd_rsp_process(data, data_len);
@@ -1098,12 +1104,12 @@
                               0x00, 0x00, 0x00, 0x00, 0x30, 0x62, 0x9F, 0x37,
                               0x28, 0x29, 0x30, 0xB8, 0xBD, 0x37, 0x06, 0x36,
                               0x00, 0x00, 0x00, 0x00};
-            
+
             if(2 == sscanf(cmd, "$PZ90CONV,%d,%d", &local, &ref))
             {
                 LOGD("set pz90conv: %d, %d", local, ref);
 
-                
+
                 if(local == 1 && ref == 0) //PZ90
                 {
                     //
@@ -1168,7 +1174,7 @@
             goto set_fail;
         }
 
-    set_success:
+//    set_success:
         if(should_wait_rsp)
         {
             setting_waitting = TRUE;