add ap channel config

examples/single_chip/camera_web_server/main/Kconfig.projbuild

@@ -31,6 +31,12 @@ config ESP_WIFI_AP_PASSWORD
     help
 	AP password for WPA2 or empty for Open.
 
+config ESP_WIFI_AP_CHANNEL
+    string "WiFi AP Channel"
+    default ""
+    help
+	AP channel for better connection performance.
+
 config SERVER_IP
     string "WiFi AP IP Address"
     default "192.168.4.1"

examples/single_chip/camera_web_server/main/app_wifi.c

@@ -45,7 +45,9 @@
 #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_MAX_STA_CONN       CONFIG_MAX_STA_CONN
 #define EXAMPLE_IP_ADDR            CONFIG_SERVER_IP
+#define EXAMPLE_ESP_WIFI_AP_CHANNEL CONFIG_ESP_WIFI_AP_CHANNEL
 
 static const char *TAG = "camera wifi";
 
@@ -108,11 +110,16 @@ void wifi_init_softap()
     snprintf((char*)wifi_config.ap.ssid, 32, "%s", EXAMPLE_ESP_WIFI_AP_SSID);
     wifi_config.ap.ssid_len = strlen((char*)wifi_config.ap.ssid);
     snprintf((char*)wifi_config.ap.password, 64, "%s", EXAMPLE_ESP_WIFI_AP_PASS);
-    wifi_config.ap.max_connection = 1;
+    wifi_config.ap.max_connection = EXAMPLE_MAX_STA_CONN;
     wifi_config.ap.authmode = WIFI_AUTH_WPA_WPA2_PSK;
     if (strlen(EXAMPLE_ESP_WIFI_AP_PASS) == 0) {
         wifi_config.ap.authmode = WIFI_AUTH_OPEN;
     }
+    if (strlen(EXAMPLE_ESP_WIFI_AP_CHANNEL)) {
+        int channel;
+        sscanf(EXAMPLE_ESP_WIFI_AP_CHANNEL, "%d", &channel);
+        wifi_config.ap.channel = channel;
+    }
 
     ESP_ERROR_CHECK(esp_wifi_set_config(ESP_IF_WIFI_AP, &wifi_config));
 

examples/single_chip/recognition_solution/main/Kconfig.projbuild

@@ -18,6 +18,12 @@ config MAX_STA_CONN
     help
 	Max number of the STA connects to AP.
 
+config ESP_WIFI_AP_CHANNEL
+    string "WiFi AP Channel"
+    default ""
+    help
+	AP channel for better connection performance.
+
 config SERVER_IP
     string "IP address of server"
     default "192.168.4.1"

examples/single_chip/recognition_solution/main/app_wifi.c

@@ -41,6 +41,7 @@ static const char *TAG = "app_wifi";
 #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
+#define EXAMPLE_ESP_WIFI_AP_CHANNEL CONFIG_ESP_WIFI_AP_CHANNEL
 
 static esp_err_t event_handler(void *ctx, system_event_t *event)
 {/*{{{*/
@@ -112,6 +113,11 @@ static void wifi_init_softap()
     wifi_config.ap.ssid_len = strlen(EXAMPLE_ESP_WIFI_SSID);
     wifi_config.ap.max_connection = EXAMPLE_MAX_STA_CONN;
     wifi_config.ap.authmode = WIFI_AUTH_WPA_WPA2_PSK;
+    if (strlen(EXAMPLE_ESP_WIFI_AP_CHANNEL)) {
+        int channel;
+        sscanf(EXAMPLE_ESP_WIFI_AP_CHANNEL, "%d", &channel);
+        wifi_config.ap.channel = channel;
+    }
     if (strlen(EXAMPLE_ESP_WIFI_PASS) == 0) {
         wifi_config.ap.authmode = WIFI_AUTH_OPEN;
     }

examples/single_chip/recognition_wechat/main/Kconfig.projbuild

@@ -18,6 +18,12 @@ config MAX_STA_CONN
     help
 	Max number of the STA connects to AP.
 
+config ESP_WIFI_AP_CHANNEL
+    string "WiFi AP Channel"
+    default ""
+    help
+	AP channel for better connection performance.
+
 config SERVER_IP
     string "IP address of server"
     default "192.168.4.1"

examples/single_chip/recognition_wechat/main/app_wifi.c

@@ -41,6 +41,7 @@ static const char *TAG = "app_wifi";
 #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
+#define EXAMPLE_ESP_WIFI_AP_CHANNEL CONFIG_ESP_WIFI_AP_CHANNEL
 
 static esp_err_t event_handler(void *ctx, system_event_t *event)
 {/*{{{*/
@@ -115,6 +116,11 @@ static void wifi_init_softap()
     if (strlen(EXAMPLE_ESP_WIFI_PASS) == 0) {
         wifi_config.ap.authmode = WIFI_AUTH_OPEN;
     }
+    if (strlen(EXAMPLE_ESP_WIFI_AP_CHANNEL)) {
+        int channel;
+        sscanf(EXAMPLE_ESP_WIFI_AP_CHANNEL, "%d", &channel);
+        wifi_config.ap.channel = channel;
+    }
 
     esp_wifi_set_ps(WIFI_PS_NONE);
     ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_AP));