Merge branch 'edoe/ampel-firmware-dev/wifioff' into develop

ampel-firmware/ampel-firmware.ino

@@ -55,6 +55,19 @@
  * and define your credentials and parameters in 'config.h'.
  */
 
+
+/*****************************************************************
+ * PreInit                                                       *
+ *****************************************************************/
+void preinit() {
+#if !defined(AMPEL_WIFI) && defined(ESP8266)
+  // WiFi would be initialized otherwise (on ESP8266), even if unused.
+  // see https://github.com/esp8266/Arduino/issues/2111#issuecomment-224251391
+  ESP8266WiFiClass::preinitWiFiOff();
+#endif
+}
+
+
 /*****************************************************************
  * Setup                                                         *
  *****************************************************************/