Add reference to WiFi fix for older versions of Espressif library

Author: gguuss

examples/Esp32-lwmqtt/esp32-mqtt.h

@@ -56,6 +56,7 @@ void setupWifi() {
   Serial.println("Starting wifi");
 
   WiFi.mode(WIFI_STA);
+  // WiFi.setSleep(false); // May help with disconnect? Seems to have been removed from WiFi
   WiFi.begin(ssid, password);
   Serial.println("Connecting to WiFi");
   while (WiFi.status() != WL_CONNECTED) {