RFXCom
======
* Wir haben einen RFXtrx433E
  * The preferred firmware for the RFXtrx433E is Ext or Ext2.
  * we are using ext2, see 2.2.2 in http://www.rfxcom.com/WebRoot/StoreNL2/Shops/78165469/MediaGallery/Downloads/RFXtrx_User_Guide.pdf