diff --git a/examples/performance/tcp_perf/main/Kconfig.projbuild b/examples/performance/tcp_perf/main/Kconfig.projbuild
index e40c52f83d..c832f56672 100644
--- a/examples/performance/tcp_perf/main/Kconfig.projbuild
+++ b/examples/performance/tcp_perf/main/Kconfig.projbuild
@@ -5,12 +5,12 @@ menu "Example Configuration"
 #	default MODE_TCP_SHIELDBOX
 #	help
 #	    This option set performance mode.
+#	    
+#	    - Testing in shieldbox for "Performance in shieldbox" setting.
 #		
-#            - for "Performance in shieldbox" setting,it will receive data by tcp.
-#		
-#	    - for "Performance in air" setting, it will send data by tcp.
-#		
-#	    - for "Performance in long distance" setting, it will send data by tcp.
+#	    - Testing in air for "Performance in air" setting.
+#	    		
+#	    - Testing in long distance for "Performance in long distance" setting.
 #		
 #					
 #config MODE_TCP_SHIELDBOX
@@ -51,7 +51,7 @@ config TCP_PERF_DELAY_DEBUG
 
 config TCP_PERF_WIFI_SSID
     string "WiFi SSID"
-	default "tp_wifi_test1"
+	default "esp_wifi_test1"
 	help
 	    SSID (network name) for the example to connect to.
 
diff --git a/examples/performance/tcp_perf/main/main.c b/examples/performance/tcp_perf/main/main.c
index eafb1b3714..65811ff390 100644
--- a/examples/performance/tcp_perf/main/main.c
+++ b/examples/performance/tcp_perf/main/main.c
@@ -19,6 +19,12 @@ step3:
     you can see the info in com port output.
 */
 
+#include <errno.h>
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "esp_log.h"
+#include "esp_err.h"
+
 #include "tcp_perf.h"
 
 int connectedflag = 0;
@@ -57,7 +63,7 @@ static void tcp_conn(void *pvParameters)
     ESP_LOGI(TAG, "creat_tcp_client.");
     socret = creat_tcp_client();
 #endif
-    if(-1 == socret) {
+    if(ESP_FAIL == socret) {
 	ESP_LOGI(TAG, "creat tcp socket error,stop.");
 	vTaskDelete(NULL);
     }
@@ -103,7 +109,6 @@ static void tcp_conn(void *pvParameters)
 
 void app_main(void)
 {
-    nvs_flash_init();
 #if ESP_WIFI_MODE_AP
     ESP_LOGI(TAG, "ESP_WIFI_MODE_AP\n");
     wifi_init_softap();
diff --git a/examples/performance/tcp_perf/main/tcp_perf.c b/examples/performance/tcp_perf/main/tcp_perf.c
index 1384dd47d6..6d1e8cb761 100644
--- a/examples/performance/tcp_perf/main/tcp_perf.c
+++ b/examples/performance/tcp_perf/main/tcp_perf.c
@@ -1,8 +1,16 @@
 
+
+#include <string.h>
+#include <sys/socket.h>
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "esp_wifi.h"
+#include "esp_event_loop.h"
+#include "esp_log.h"
+
+
 #include "tcp_perf.h"
 
-/* FreeRTOS event group to signal when we are connected & ready to make a request */
-static EventGroupHandle_t wifi_event_group;
 /*socket*/
 static int sever_socket = 0;
 static struct sockaddr_in sever_addr;
@@ -126,7 +134,7 @@ void recv_data(void *pvParameters)
 }
 
 
-//use this esp32 as a tcp sever. return 0:success -1:error
+//use this esp32 as a tcp sever. return ESP_OK:success ESP_FAIL:error
 int creat_tcp_sever()
 {
     ESP_LOGI(TAG, "sever socket....port=%d\n", DEFAULT_PORT);
@@ -134,7 +142,7 @@ int creat_tcp_sever()
     if (sever_socket < 0) {
     	show_socket_error_code(sever_socket);
 	//perror("socket() error:");
-	return -1;
+	return ESP_FAIL;
     }
     sever_addr.sin_family = AF_INET;
     sever_addr.sin_port = htons(DEFAULT_PORT);
@@ -143,26 +151,26 @@ int creat_tcp_sever()
     	show_socket_error_code(sever_socket);
 	//perror("bind() error");
 	close(sever_socket);
-	return -1;
+	return ESP_FAIL;
     }
     if (listen(sever_socket, 5) < 0) {
     	show_socket_error_code(sever_socket);
 	//perror("listen() error");
 	close(sever_socket);
-	return -1;
+	return ESP_FAIL;
     }
     connect_soc = accept(sever_socket, (struct sockaddr*)&client_addr, &socklen);
     if (connect_soc<0) {
     	show_socket_error_code(connect_soc);
 	//perror("accept() error");
 	close(sever_socket);
-	return -1;
+	return ESP_FAIL;
     }
     /*connection established，now can send/recv*/
     ESP_LOGI(TAG, "tcp connection established!");
-    return 0;
+    return ESP_OK;
 }
-//use this esp32 as a tcp client. return 0:success -1:error
+//use this esp32 as a tcp client. return ESP_OK:success ESP_FAIL:error
 int creat_tcp_client()
 {
     ESP_LOGI(TAG, "client socket....severip:port=%s:%d\n", 
@@ -171,7 +179,7 @@ int creat_tcp_client()
     if (connect_soc < 0) {
     	show_socket_error_code(connect_soc);
 	//perror("socket failed!");
-	return -1;
+	return ESP_FAIL;
     }
     sever_addr.sin_family = AF_INET;
     sever_addr.sin_port = htons(DEFAULT_PORT);
@@ -180,17 +188,16 @@ int creat_tcp_client()
     if (connect(connect_soc, (struct sockaddr *)&sever_addr, sizeof(sever_addr)) < 0) {
     	show_socket_error_code(connect_soc);
 	//perror("connect to sever error!");
-	return -1;
+	return ESP_FAIL;
     }
     ESP_LOGI(TAG, "connect to sever success!");
-    return 0;
+    return ESP_OK;
 }
 
 //wifi_init_sta
 void wifi_init_sta()
 {
     tcpip_adapter_init();
-    wifi_event_group = xEventGroupCreate();
     ESP_ERROR_CHECK(esp_event_loop_init(event_handler, NULL) );
 
     wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
@@ -214,7 +221,6 @@ void wifi_init_sta()
 void wifi_init_softap()
 {
     tcpip_adapter_init();
-    wifi_event_group = xEventGroupCreate();
     ESP_ERROR_CHECK(esp_event_loop_init(event_handler, NULL));
 
     wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
diff --git a/examples/performance/tcp_perf/main/tcp_perf.h b/examples/performance/tcp_perf/main/tcp_perf.h
index a6b70cf90f..3b7ba0b60d 100644
--- a/examples/performance/tcp_perf/main/tcp_perf.h
+++ b/examples/performance/tcp_perf/main/tcp_perf.h
@@ -1,22 +1,6 @@
 #ifndef __TCP_PERF_H__
 #define __TCP_PERF_H__
 
-#include <stdio.h>
-#include <string.h>
-#include "freertos/FreeRTOS.h"
-#include "freertos/task.h"
-#include "freertos/event_groups.h"
-#include "esp_wifi.h"
-#include "esp_event_loop.h"
-#include "esp_system.h"
-#include "nvs_flash.h"
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include "driver/uart.h"
-#include "soc/uart_struct.h"
-#include "esp_log.h"
-
-
 
 
 #ifdef __cplusplus
diff --git a/examples/performance/udp_perf/main/Kconfig.projbuild b/examples/performance/udp_perf/main/Kconfig.projbuild
index 19917ee736..5567ed2cda 100644
--- a/examples/performance/udp_perf/main/Kconfig.projbuild
+++ b/examples/performance/udp_perf/main/Kconfig.projbuild
@@ -1,15 +1,16 @@
 menu "Example Configuration"
 
 #choice 
-#    prompt "UCP_PERF_MODE "
-#	default MODE_UDP_SHIELDBOX
+#   prompt "TCP_PERF_MODE "
+#	default MODE_TCP_SHIELDBOX
 #	help
 #	    This option set performance mode.
-#		
-#	    - for "Performance in shieldbox" setting,it will receive data by udp.
-#	    - for "Performance in air" setting, it will send data by udp.
 #	    
-#	    - for "Performance in long distance" setting, it will send data by udp.
+#	    - Testing in shieldbox for "Performance in shieldbox" setting.
+#		
+#	    - Testing in air for "Performance in air" setting.
+#	    		
+#	    - Testing in long distance for "Performance in long distance" setting.
 #		
 #					
 #config MODE_UDP_SHIELDBOX
@@ -28,7 +29,7 @@ config UDP_PERF_WIFI_MODE_AP
 
 config UDP_PERF_SEVER
     bool "TCP performance sever enable"
-	default n
+	default y
 	help
 	    yes:ESP32 is UDP sever. no:ESP32 is UDP client.
 		
@@ -36,13 +37,13 @@ config UDP_PERF_SEVER
 
 config UDP_PERF_TX
     bool "UDP performance TX test enable"
-	default y
+	default n
 	help
 	    yes:UDP TX test. no:UDP RX test.
 
 config UDP_PERF_WIFI_SSID
     string "WiFi SSID"
-	default "tp_wifi_test1"
+	default "esp_wifi_test1"
 	help
 	    SSID (network name) for the example to connect to.
 
diff --git a/examples/performance/udp_perf/main/main.c b/examples/performance/udp_perf/main/main.c
index 10213063db..0318ee6a3b 100644
--- a/examples/performance/udp_perf/main/main.c
+++ b/examples/performance/udp_perf/main/main.c
@@ -19,6 +19,11 @@ step3:
     you can see the info in com port output.
 */
 
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "esp_log.h"
+#include "esp_err.h"
+
 #include "udp_perf.h"
 
 int connectedflag = 0;
@@ -50,7 +55,7 @@ static void udp_conn(void *pvParameters)
     ESP_LOGI(TAG, "creat_udp_client.");
     socret = creat_udp_client();
 #endif
-    if(-1 == socret) {
+    if(ESP_FAIL == socret) {
 	ESP_LOGI(TAG, "creat udp socket error,stop.");
 	vTaskDelete(NULL);
     }
@@ -80,7 +85,6 @@ static void udp_conn(void *pvParameters)
 
 void app_main(void)
 {
-    nvs_flash_init();
 #if ESP_WIFI_MODE_AP
     ESP_LOGI(TAG, "ESP_WIFI_MODE_AP\n");
     wifi_init_softap();
diff --git a/examples/performance/udp_perf/main/udp_perf.c b/examples/performance/udp_perf/main/udp_perf.c
index 9b37fd1626..c3cb339c34 100644
--- a/examples/performance/udp_perf/main/udp_perf.c
+++ b/examples/performance/udp_perf/main/udp_perf.c
@@ -1,9 +1,17 @@
 
+#include <string.h>
+#include <sys/socket.h>
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "esp_wifi.h"
+#include "esp_event_loop.h"
+#include "esp_log.h"
+
+
 #include "udp_perf.h"
 
 
-/* FreeRTOS event group to signal when we are connected & ready to make a request */
-static EventGroupHandle_t wifi_event_group;
+
 static int mysocket;
 
 static struct sockaddr_in remote_addr;
@@ -49,7 +57,6 @@ static esp_err_t event_handler(void *ctx, system_event_t *event)
 void wifi_init_sta()
 {
     tcpip_adapter_init();
-    wifi_event_group = xEventGroupCreate();
     ESP_ERROR_CHECK(esp_event_loop_init(event_handler, NULL) );
 
     wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
@@ -73,7 +80,6 @@ void wifi_init_sta()
 void wifi_init_softap()
 {
     tcpip_adapter_init();
-    wifi_event_group = xEventGroupCreate();
     ESP_ERROR_CHECK(esp_event_loop_init(event_handler, NULL));
 
     wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
@@ -99,14 +105,14 @@ void wifi_init_softap()
     	    DEFAULT_SSID, DEFAULT_PWD);
 }
 
-//creat a udp sever socket. return 0:success -1:error
+//creat a udp sever socket. return ESP_OK:success ESP_FAIL:error
 int creat_udp_sever()
 {
     ESP_LOGI(TAG, "creat_udp_sever()");
     mysocket = socket(AF_INET, SOCK_DGRAM, 0);
     if (mysocket < 0) {
 	perror("socket failed:");
-	return -1;
+	return ESP_FAIL;
     }
     struct sockaddr_in sever_addr;
     sever_addr.sin_family = AF_INET;
@@ -115,26 +121,26 @@ int creat_udp_sever()
     if (bind(mysocket, (struct sockaddr *)&sever_addr, sizeof(sever_addr)) < 0) {
 	perror("bind local port error:");
 	close(mysocket);
-	return -1;
+	return ESP_FAIL;
     }
-    return 0;
+    return ESP_OK;
 }
 
-//creat a udp client socket. return 0:success -1:error
+//creat a udp client socket. return ESP_OK:success ESP_FAIL:error
 int creat_udp_client()
 {
     ESP_LOGI(TAG, "creat_udp_client()");
     mysocket = socket(AF_INET, SOCK_DGRAM, 0);
     if (mysocket < 0) {
 	perror("socket failed:");
-	return -1;
+	return ESP_FAIL;
     }
     /*for client remote_addr is also sever_addr*/
     remote_addr.sin_family = AF_INET;
     remote_addr.sin_port = htons(DEFAULT_PORT);
     remote_addr.sin_addr.s_addr = inet_addr(DEFAULT_SEVER_IP);
 
-    return 0;
+    return ESP_OK;
 }
 
 
diff --git a/examples/performance/udp_perf/main/udp_perf.h b/examples/performance/udp_perf/main/udp_perf.h
index 64ad225db2..ecafcf9be0 100644
--- a/examples/performance/udp_perf/main/udp_perf.h
+++ b/examples/performance/udp_perf/main/udp_perf.h
@@ -1,22 +1,6 @@
 #ifndef __UDP_PERF_H__
 #define __UDP_PERF_H__
 
-#include <stdio.h>
-#include <string.h>
-#include "freertos/FreeRTOS.h"
-#include "freertos/task.h"
-#include "freertos/event_groups.h"
-#include "esp_wifi.h"
-#include "esp_event_loop.h"
-#include "esp_system.h"
-#include "nvs_flash.h"
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include "driver/uart.h"
-#include "soc/uart_struct.h"
-#include "esp_log.h"
-
-
 
 
 #ifdef __cplusplus