Assume unspecified boards are using standard WiFi library.

Arduino/sketches/wolfssl_client/wolfssl_client.ino

@@ -166,9 +166,10 @@ Tested with:
 #elif defined(OTHER_BOARD)
 */
 #else
+    /* assume all other boards using WiFi library. Edit as needed: */
+    #include <WiFi.h>
     #define USING_WIFI
     WiFiClient client;
-
 #endif
 
 /* Only for syntax highlighters to show interesting options enabled: */

Arduino/sketches/wolfssl_server/wolfssl_server.ino

@@ -166,6 +166,8 @@ Tested with:
 #elif defined(OTHER_BOARD)
 */
 #else
+    /* assume all other boards using WiFi library. Edit as needed: */
+    #include <WiFi.h>
     #define USING_WIFI
     WiFiClient client;
     WiFiServer server(WOLFSSL_PORT);