Put WiFi into station mode in examples (#3731)

libraries/ESP8266WiFi/examples/HTTPSRequest/HTTPSRequest.ino

@@ -29,6 +29,7 @@ void setup() {
   Serial.println();
   Serial.print("connecting to ");
   Serial.println(ssid);
+  WiFi.mode(WIFI_STA);
   WiFi.begin(ssid, password);
   while (WiFi.status() != WL_CONNECTED) {
     delay(500);

libraries/ESP8266WiFi/examples/HTTPSRequestCACert/HTTPSRequestCACert.ino

@@ -37,6 +37,7 @@ void setup() {
   Serial.println();
   Serial.print("connecting to ");
   Serial.println(ssid);
+  WiFi.mode(WIFI_STA);
   WiFi.begin(ssid, password);
   while (WiFi.status() != WL_CONNECTED) {
     delay(500);

libraries/ESP8266WiFi/examples/NTPClient/NTPClient.ino

@@ -49,6 +49,7 @@ void setup()
   // We start by connecting to a WiFi network
   Serial.print("Connecting to ");
   Serial.println(ssid);
+  WiFi.mode(WIFI_STA);
   WiFi.begin(ssid, pass);
   
   while (WiFi.status() != WL_CONNECTED) {

libraries/ESP8266WiFi/examples/WiFiClientBasic/WiFiClientBasic.ino

@@ -13,6 +13,7 @@ void setup() {
     delay(10);
 
     // We start by connecting to a WiFi network
+    WiFi.mode(WIFI_STA);
     WiFiMulti.addAP("SSID", "passpasspass");
 
     Serial.println();

libraries/ESP8266WiFi/examples/WiFiMulti/WiFiMulti.ino

@@ -12,6 +12,7 @@ void setup() {
     Serial.begin(115200);
     delay(10);
 	
+    WiFi.mode(WIFI_STA);
     wifiMulti.addAP("ssid_from_AP_1", "your_password_for_AP_1");
     wifiMulti.addAP("ssid_from_AP_2", "your_password_for_AP_2");
     wifiMulti.addAP("ssid_from_AP_3", "your_password_for_AP_3");
@@ -30,4 +31,4 @@ void loop() {
         Serial.println("WiFi not connected!");
         delay(1000);
     }
-}
+}

libraries/ESP8266WiFi/examples/WiFiTelnetToSerial/WiFiTelnetToSerial.ino

@@ -30,6 +30,7 @@ WiFiClient serverClients[MAX_SRV_CLIENTS];
 
 void setup() {
   Serial1.begin(115200);
+  WiFi.mode(WIFI_STA);
   WiFi.begin(ssid, password);
   Serial1.print("\nConnecting to "); Serial1.println(ssid);
   uint8_t i = 0;

libraries/ESP8266WiFi/examples/WiFiWebServer/WiFiWebServer.ino

@@ -30,6 +30,7 @@ void setup() {
   Serial.print("Connecting to ");
   Serial.println(ssid);
   
+  WiFi.mode(WIFI_STA);
   WiFi.begin(ssid, password);
   
   while (WiFi.status() != WL_CONNECTED) {