Avoid starting AP Mode even when the password is too short (#7832)

* Avoid starting AP Mode even when the password is too short

* Check SoftAP return code in case of failure

libraries/WiFi/examples/WiFiAccessPoint/WiFiAccessPoint.ino

@@ -32,7 +32,11 @@ void setup() {
   Serial.println("Configuring access point...");
 
   // You can remove the password parameter if you want the AP to be open.
-  WiFi.softAP(ssid, password);
+  // a valid password must have more than 7 characters
+  if (!WiFi.softAP(ssid, password)) {
+    log_e("Soft AP creation failed.");
+    while(1);
+  }
   IPAddress myIP = WiFi.softAPIP();
   Serial.print("AP IP address: ");
   Serial.println(myIP);

libraries/WiFi/src/WiFiAP.cpp

@@ -136,12 +136,6 @@ void wifi_softap_config(wifi_config_t *wifi_config, const char * ssid=NULL, cons
 bool WiFiAPClass::softAP(const char* ssid, const char* passphrase, int channel, int ssid_hidden, int max_connection, bool ftm_responder)
 {
 
-    if(!WiFi.enableAP(true)) {
-        // enable AP failed
-        log_e("enable AP first!");
-        return false;
-    }
-
     if(!ssid || *ssid == 0) {
         // fail SSID missing
         log_e("SSID missing!");
@@ -154,6 +148,13 @@ bool WiFiAPClass::softAP(const char* ssid, const char* passphrase, int channel,
         return false;
     }
 
+    // last step after checking the SSID and password
+    if(!WiFi.enableAP(true)) {
+        // enable AP failed
+        log_e("enable AP first!");
+        return false;
+    }
+
     wifi_config_t conf;
     wifi_config_t conf_current;
     wifi_softap_config(&conf, ssid, passphrase, channel, WIFI_AUTH_WPA2_PSK, ssid_hidden, max_connection, ftm_responder);