diff --git a/examples/single_chip/camera_web_server/main/Kconfig.projbuild b/examples/single_chip/camera_web_server/main/Kconfig.projbuild
index f001546..1745750 100644
--- a/examples/single_chip/camera_web_server/main/Kconfig.projbuild
+++ b/examples/single_chip/camera_web_server/main/Kconfig.projbuild
@@ -25,6 +25,10 @@ config ESP_WIFI_AP_PASSWORD
     help
 	AP password for WPA2 or empty for Open.
 
+config SERVER_IP
+    string "IP address of server"
+    default "192.168.4.1"
+
 config ESP_MAXIMUM_RETRY
     int "Maximum retry"
     default 5
diff --git a/examples/single_chip/camera_web_server/main/app_wifi.c b/examples/single_chip/camera_web_server/main/app_wifi.c
index cc0c7f2..e56e2a8 100644
--- a/examples/single_chip/camera_web_server/main/app_wifi.c
+++ b/examples/single_chip/camera_web_server/main/app_wifi.c
@@ -43,6 +43,7 @@
 #define EXAMPLE_ESP_MAXIMUM_RETRY  CONFIG_ESP_MAXIMUM_RETRY
 #define EXAMPLE_ESP_WIFI_AP_SSID   CONFIG_ESP_WIFI_AP_SSID
 #define EXAMPLE_ESP_WIFI_AP_PASS   CONFIG_ESP_WIFI_AP_PASSWORD
+#define EXAMPLE_IP_ADDR            CONFIG_SERVER_IP
 
 static const char *TAG = "camera wifi";
 
@@ -87,6 +88,18 @@ static esp_err_t event_handler(void *ctx, system_event_t *event)
 
 void wifi_init_softap()
 {
+    if (strcmp(EXAMPLE_IP_ADDR, "192.168.4.1"))
+    {
+        int a, b, c, d;
+        sscanf(EXAMPLE_IP_ADDR, "%d.%d.%d.%d", &a, &b, &c, &d);
+        tcpip_adapter_ip_info_t ip_info;
+        IP4_ADDR(&ip_info.ip, a, b, c, d);
+        IP4_ADDR(&ip_info.gw, a, b, c, d);
+        IP4_ADDR(&ip_info.netmask, 255, 255, 255, 0);
+        ESP_ERROR_CHECK(tcpip_adapter_dhcps_stop(WIFI_IF_AP));
+        ESP_ERROR_CHECK(tcpip_adapter_set_ip_info(WIFI_IF_AP, &ip_info));
+        ESP_ERROR_CHECK(tcpip_adapter_dhcps_start(WIFI_IF_AP));
+    }
     wifi_config_t wifi_config;
     memset(&wifi_config, 0, sizeof(wifi_config_t));
     snprintf((char*)wifi_config.ap.ssid, 32, "%s", EXAMPLE_ESP_WIFI_AP_SSID);
diff --git a/examples/single_chip/recognition_solution/main/Kconfig.projbuild b/examples/single_chip/recognition_solution/main/Kconfig.projbuild
index e0e24d2..eae51b5 100644
--- a/examples/single_chip/recognition_solution/main/Kconfig.projbuild
+++ b/examples/single_chip/recognition_solution/main/Kconfig.projbuild
@@ -11,10 +11,14 @@ config ESP_WIFI_PASSWORD
     default ""
     help
 	WiFi password (WPA or WPA2) for the example to use.
-		
+
 config MAX_STA_CONN
     int "Maximal STA connections"
     default 1
     help
 	Max number of the STA connects to AP.
+
+config SERVER_IP
+    string "IP address of server"
+    default "192.168.4.1"
 endmenu
diff --git a/examples/single_chip/recognition_solution/main/app_wifi.c b/examples/single_chip/recognition_solution/main/app_wifi.c
index ff23455..9e56a68 100644
--- a/examples/single_chip/recognition_solution/main/app_wifi.c
+++ b/examples/single_chip/recognition_solution/main/app_wifi.c
@@ -40,6 +40,7 @@ static const char *TAG = "app_wifi";
 #define EXAMPLE_ESP_WIFI_SSID      CONFIG_ESP_WIFI_SSID
 #define EXAMPLE_ESP_WIFI_PASS      CONFIG_ESP_WIFI_PASSWORD
 #define EXAMPLE_MAX_STA_CONN       CONFIG_MAX_STA_CONN
+#define EXAMPLE_IP_ADDR            CONFIG_SERVER_IP
 
 static esp_err_t event_handler(void *ctx, system_event_t *event)
 {/*{{{*/
@@ -75,6 +76,20 @@ static esp_err_t event_handler(void *ctx, system_event_t *event)
 static void wifi_init_softap()
 {
     tcpip_adapter_init();
+
+    if (strcmp(EXAMPLE_IP_ADDR, "192.168.4.1"))
+    {
+        int a, b, c, d;
+        sscanf(EXAMPLE_IP_ADDR, "%d.%d.%d.%d", &a, &b, &c, &d);
+        tcpip_adapter_ip_info_t ip_info;
+        IP4_ADDR(&ip_info.ip, a, b, c, d);
+        IP4_ADDR(&ip_info.gw, a, b, c, d);
+        IP4_ADDR(&ip_info.netmask, 255, 255, 255, 0);
+        ESP_ERROR_CHECK(tcpip_adapter_dhcps_stop(WIFI_IF_AP));
+        ESP_ERROR_CHECK(tcpip_adapter_set_ip_info(WIFI_IF_AP, &ip_info));
+        ESP_ERROR_CHECK(tcpip_adapter_dhcps_start(WIFI_IF_AP));
+    }
+
     ESP_ERROR_CHECK(esp_event_loop_init(event_handler, NULL));
 
     wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
@@ -103,7 +118,7 @@ static void wifi_init_softap()
 
     esp_wifi_set_ps(WIFI_PS_NONE);
     ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_AP));
-    ESP_ERROR_CHECK(esp_wifi_set_config(ESP_IF_WIFI_AP, &wifi_config));
+    ESP_ERROR_CHECK(esp_wifi_set_config(WIFI_IF_AP, &wifi_config));
 
     ESP_ERROR_CHECK(esp_wifi_start());