adds setCountry, default US

accepts US JP CN, codes must be added to strings and WiFiSetCountry atm

WiFiManager.cpp

@@ -218,6 +218,8 @@ boolean WiFiManager::autoConnect(char const *apName, char const *apPassword) {
     DEBUG_WM(DEBUG_ERROR,"[FATAL] Unable to enable wifi!");
     return false;
   }
+  
+  WiFiSetCountry();
 
   #ifdef ESP32
   if(esp32persistent) WiFi.persistent(false); // disable persistent for esp32 after esp_wifi_start or else saves wont work
@@ -484,6 +486,7 @@ boolean  WiFiManager::startConfigPortal(char const *apName, char const *apPasswo
   // start access point
   DEBUG_WM(DEBUG_VERBOSE,F("Enabling AP"));
   startAP();
+  WiFiSetCountry();
 
   // init configportal
   DEBUG_WM(DEBUG_DEV,F("setupConfigPortal"));
@@ -2129,6 +2132,14 @@ bool WiFiManager::getWiFiIsSaved(){
   return WiFi_hasAutoConnect();
 }
 
+/**
+ * setCountry
+ * @since $dev
+ * @param String cc country code, must be defined in WiFiSetCountry, US, JP, CN
+ */
+void WiFiManager::setCountry(String cc){
+  _wificountry = cc;
+}
 
 // HELPERS
 
@@ -2167,7 +2178,6 @@ void WiFiManager::DEBUG_WM(wm_debuglevel_t level,Generic text,Genericb textb) {
   _debugPort.println();
 }
 
-
 /**
  * [debugSoftAPConfig description]
  * @access public
@@ -2303,6 +2313,22 @@ String WiFiManager::getModeString(uint8_t mode){
   return FPSTR(S_NA);
 }
 
+
+bool WiFiManager::WiFiSetCountry(){
+  bool ret = false;
+  // @todo check if wifi is init, no idea how, doesnt seem to be exposed
+  if(_wificountry == "") return ret; // skip not set
+  else if(WiFi.getMode() == WIFI_MODE_NULL); // exception if wifi not init!
+  else if(_wificountry == "US") ret = esp_wifi_set_country(&WM_COUNTRY_US) == ESP_OK;
+  else if(_wificountry == "JP") ret = esp_wifi_set_country(&WM_COUNTRY_JP) == ESP_OK;
+  else if(_wificountry == "CN") ret = esp_wifi_set_country(&WM_COUNTRY_CN) == ESP_OK;
+  else DEBUG_WM(DEBUG_ERROR,"[ERROR] country code not found");
+  
+  if(ret) DEBUG_WM(DEBUG_VERBOSE,"esp_wifi_set_country: " + _wificountry);
+  else DEBUG_WM(DEBUG_ERROR,"[ERROR] esp_wifi_set_country failed");
+  return ret;
+}
+
 // set mode ignores WiFi.persistent 
 bool WiFiManager::WiFi_Mode(WiFiMode_t m,bool persistent) {
     bool ret;

WiFiManager.h

@@ -235,6 +235,7 @@ class WiFiManager
     // debug output platform info and versioning
     void          debugPlatformInfo();
     String        htmlEntities(String str);
+    void          setCountry(String cc);
 
   private:
     std::unique_ptr<DNSServer>        dnsServer;
@@ -314,6 +315,8 @@ class WiFiManager
     boolean       _preloadwifiscan        = true;  // preload wifiscan if true
     boolean       _disableIpFields        = false; // edge case, if true, showxFields(false) forces ip fields off instead of default show when set
 
+    String        _wificountry            = "US";  // country code, @todo define in strings lang
+
     // wrapper functions for handling setting and unsetting persistent for now.
     bool          esp32persistent         = false;
     bool          _hasBegun               = false;
@@ -372,6 +375,7 @@ class WiFiManager
     bool          WiFi_scanNetworks();
     bool          WiFi_scanNetworks(bool force);
     bool          WiFi_scanNetworks(unsigned int cachetime);
+    bool          WiFiSetCountry();
 
     #ifdef ESP32
     static void   WiFiEvent(WiFiEvent_t event, system_event_info_t info);

strings_en.h

@@ -318,3 +318,7 @@ const char * const AUTH_MODE_NAMES[] PROGMEM
 #endif
 
 const char* const WIFI_MODES[] PROGMEM = { "NULL", "STA", "AP", "STA+AP" };
+
+const wifi_country_t WM_COUNTRY_US{"US",1,11,WIFI_COUNTRY_POLICY_AUTO};
+const wifi_country_t WM_COUNTRY_CN{"CN",1,13,WIFI_COUNTRY_POLICY_AUTO};
+const wifi_country_t WM_COUNTRY_JP{"JP",1,14,WIFI_COUNTRY_POLICY_AUTO};