add websocket protocol

main/boards/common/wifi_board.cc

@@ -66,12 +66,15 @@ Http* WifiBoard::CreateHttp() {
 }
 
 WebSocket* WifiBoard::CreateWebSocket() {
+#ifdef CONFIG_CONNECTION_TYPE_WEBSOCKET
     std::string url = CONFIG_WEBSOCKET_URL;
     if (url.find("wss://") == 0) {
-            return new WebSocket(new TlsTransport());
-        } else {
-            return new WebSocket(new TcpTransport());
-        }
+        return new WebSocket(new TlsTransport());
+    } else {
+        return new WebSocket(new TcpTransport());
+    }
+#endif
+    return nullptr;
 }
 
 Mqtt* WifiBoard::CreateMqtt() {