diff --git a/demos/oc_mqtt_demo/oc_mqtt_v5_demo.c b/demos/oc_mqtt_demo/oc_mqtt_v5_demo.c
index 2475ed2bd..9be9d8919 100644
--- a/demos/oc_mqtt_demo/oc_mqtt_v5_demo.c
+++ b/demos/oc_mqtt_demo/oc_mqtt_v5_demo.c
@@ -336,7 +336,7 @@ static int task_reportmsg_entry(void *args)
 
     connect_para.boostrap =      CN_BOOT_MODE;
     connect_para.device_id =     CN_EP_DEVICEID;
-    connect_para.device_passwd = NULL;
+    connect_para.device_passwd = CN_EP_PASSWD;
     connect_para.server_addr =   CN_SERVER_IPV4;
     connect_para.sevver_port =   CN_SERVER_PORT;
     connect_para.life_time =     CN_LIFE_TIME;
diff --git a/iot_link/network/tcpip/esp8266_socket/esp8266_socket_imp.c b/iot_link/network/tcpip/esp8266_socket/esp8266_socket_imp.c
index a8afed9c0..82db5429b 100644
--- a/iot_link/network/tcpip/esp8266_socket/esp8266_socket_imp.c
+++ b/iot_link/network/tcpip/esp8266_socket/esp8266_socket_imp.c
@@ -564,6 +564,7 @@ int link_tcpip_imp_init(void)
     at_oobregister("esp8266rcv",CN_ESP8266_RCVINDEX,strlen(CN_ESP8266_RCVINDEX),esp8266_rcvdeal,NULL);
     ring_buffer_init(&s_esp8266_sock_cb.esp8266_rcvring,s_esp8266_sock_cb.esp8266_rcvbuf,CN_ESP8266_CACHELEN,0,0);
 
+    osal_task_sleep(1000);
 
     esp8266_reset();
     esp8266_echo_off();
@@ -573,7 +574,13 @@ int link_tcpip_imp_init(void)
 
     while(false == esp8266_joinap(WIFI_SSID, WIFI_PASSWD))
     {
-        LINK_LOG_DEBUG("connect ap failed, repeat...\r\n");
+        osal_task_sleep(1000);
+        esp8266_reset();
+        esp8266_echo_off();
+        esp8266_show_dinfo(0);
+        esp8266_set_mode(STA);
+        esp8266_set_mux(0);
+        LINK_LOG_DEBUG("connect ap failed, retry..\r\n");
     }
    //reach here means everything is ok, we can go now
     ret = link_sal_install(&s_tcpip_socket);
diff --git a/targets/GD32F303_BearPi/BearPi_IoT_GD.CFG b/targets/GD32F303_BearPi/BearPi_IoT_GD.CFG
new file mode 100644
index 000000000..e7c7b0f4e
--- /dev/null
+++ b/targets/GD32F303_BearPi/BearPi_IoT_GD.CFG
@@ -0,0 +1,3 @@
+interface cmsis-dap
+transport select swd
+source [find target/stm32f3x.cfg]
\ No newline at end of file
diff --git a/targets/GD32F303_BearPi/GCC/config.mk b/targets/GD32F303_BearPi/GCC/config.mk
index f9bfa6552..93fe47eae 100644
--- a/targets/GD32F303_BearPi/GCC/config.mk
+++ b/targets/GD32F303_BearPi/GCC/config.mk
@@ -75,9 +75,10 @@ CONFIG_AT_ENABLE     := y
 ########################INDEPENDENT SERVICE START#################################
 
 #CONFIG_CJSON_ENABLE , we port the cJSON based on the osal,you could choose yes or no
-CONFIG_CJSON_ENABLE := n
+CONFIG_CJSON_ENABLE := y
 
 ########################INDEPENDENT SERVICE END#################################
+CONFIG_LOG_ENABLE := y
 
 
 ########################NETWORK SERVICE START###################################
@@ -93,13 +94,13 @@ CONFIG_TCPIP_TYPE := "esp8266_socket"
 #CONFIG_DTLS_ENABLE , we supply a DTLS AL (building),you could choose yes or no
 #CONFIG_DTLS_TYPE, could be "mbeddtls_psk" "mbedtls_cert" "none"
 
-CONFIG_DTLS_ENABLE   := n
-CONFIG_DTLS_TYPE     := "mbedtls_psk"
+CONFIG_DTLS_ENABLE   := y
+CONFIG_DTLS_TYPE     := "mbedtls_cert"
 
 #CONFIG_MQTT_ENABLE, we build a mqtt abstraction, which shield the difference of 
 #the implement of mqtt. 
 #CONFIG_MQTT_TYPE could be "paho_mqtt" "none"
-CONFIG_MQTT_ENABLE   := n
+CONFIG_MQTT_ENABLE   := y
 CONFIG_MQTT_TYPE     := "paho_mqtt"
 
 #CONFIG_LWM2M_ENABLE, we build a lwm2m abstraction, which shield the difference of 
@@ -111,7 +112,7 @@ CONFIG_LWM2M_TYPE     := "wakaama_lwm2m"
 #CONFIG_COAP_ENABLE, we build a coap abstraction, which shield the difference of 
 #the implement of coap. 
 #CONFIG_COAP_TYPE could be "lite_coap" "none"
-CONFIG_COAP_ENABLE   := y
+CONFIG_COAP_ENABLE   := n
 CONFIG_COAP_TYPE     := "lite_coap"
 ########################NETWORK SERVICE END#####################################
 
@@ -120,7 +121,7 @@ CONFIG_COAP_TYPE     := "lite_coap"
 #CONFIG_OC_COAP_ENABLE, we build a oc coap abstraction for huawei OceanConnect service,
 #which shield the difference of the implement of oc coap. 
 #CONFIG_OC_MQTT_TYPE could be "soft" "none"
-CONFIG_OC_COAP_ENABLE := y
+CONFIG_OC_COAP_ENABLE := n
 CONFIG_OC_COAP_TYPE   := "soft"
 
 #CONFIG_OC_MQTT_ENABLE, we build a oc mqtt abstraction for huawei OceanConnect service,
@@ -129,10 +130,10 @@ CONFIG_OC_COAP_TYPE   := "soft"
 #CONFIG_OC_MQTT_VERSION could be "V5"  "V1",use this to select the used interface
 #CONFIG_OCMQTT_DEMO_ENABLE could be y or n, use this to enable the oc mqtt demo
 #CONFIG_OCMQTT_DEMO_BSENABLE could be y or n, use this to enable the bootstrap or not
-CONFIG_OC_MQTT_ENABLE := n
+CONFIG_OC_MQTT_ENABLE := y
 CONFIG_OC_MQTT_TYPE   := "soft"
-CONFIG_OC_MQTT_VERSION := "V1"
-CONFIG_OC_MQTTDEMO_ENABLE := n
+CONFIG_OC_MQTT_VERSION := "V5"
+CONFIG_OC_MQTTDEMO_ENABLE := y
 CONFIG_OC_MQTTDEMO_BSENABLE := y
 
 
@@ -169,7 +170,7 @@ CONFIG_PCP_ENABLE      := n
 #"oc_lwm2m_bs_demo"  "oc_lwm2m_demo" "oc_lwm2m_ota_demo" "stimer_demo"
 
 CONFIG_DEMO_ENABLE := y
-CONFIG_DEMO_TYPE   := "oc_coap_demo"
+CONFIG_DEMO_TYPE   := ""
 
 #########################STANDARD DEMO END######################################
 include $(TOP_DIR)/iot_link/iot.mk
diff --git a/targets/GD32F303_BearPi/Src/main.c b/targets/GD32F303_BearPi/Src/main.c
index 1f0212c7d..22f87fbc7 100644
--- a/targets/GD32F303_BearPi/Src/main.c
+++ b/targets/GD32F303_BearPi/Src/main.c
@@ -109,7 +109,7 @@ static int link_test()
 
 int main(void)
 {
-    UINT32 uwRet = LOS_OK;
+    UINT32 uwRet;
 
     HardWare_Init();
 
@@ -126,4 +126,5 @@ int main(void)
 
 	LOS_Start();
 
+	return uwRet;
 }
diff --git a/targets/GD32F303_BearPi/uart_at/uart_at.c b/targets/GD32F303_BearPi/uart_at/uart_at.c
index 94c89aa67..49e365993 100644
--- a/targets/GD32F303_BearPi/uart_at/uart_at.c
+++ b/targets/GD32F303_BearPi/uart_at/uart_at.c
@@ -34,6 +34,7 @@
 
 #include "gd32f30x.h"
 #include "BearPi-IoT_gd32f303.h"
+#include <string.h>
 #include <stdint.h>
 #include <stddef.h>
 #include <osal.h>