Add AP start/stop events

The client can now be notified when the library goes into station mode. This is useful if it wants to display some indication to the user. The client will also be notified when station mode is turned off.

.gitignore

@@ -0,0 +1 @@
+.DS_Store

include/wifi_config.h

@@ -3,6 +3,8 @@
 typedef enum {
     WIFI_CONFIG_CONNECTED = 1,
     WIFI_CONFIG_DISCONNECTED = 2,
+    WIFI_CONFIG_AP_START = 3,
+    WIFI_CONFIG_AP_STOP = 4
 } wifi_config_event_t;
 
 void wifi_config_init(const char *ssid_prefix, const char *password, void (*on_wifi_ready)());

src/wifi_config.c

@@ -682,6 +682,8 @@ static void wifi_config_softap_start() {
 
     dns_start();
     http_start();
+    if (context->on_event)
+        context->on_event(WIFI_CONFIG_AP_START);
 }
 
 
@@ -690,6 +692,8 @@ static void wifi_config_softap_stop() {
     dns_stop();
     http_stop();
     sdk_wifi_set_opmode(STATION_MODE);
+    if (context->on_event)
+        context->on_event(WIFI_CONFIG_AP_STOP);
 }