ELM USB Treiber Driver (ScanMaster- ELM für ELM USB Bluetooth WLAN). ScanMaster- ELM v DEMO (ScanMaster- ELM für ELM USB Bluetooth. Free download of the OBDII car diagnostic software for Windows, Mac OS X and allows you to test the connectivity to the ELM -based OBD interface and your. Free Software compatible with all genuine Elm Interfaces. This website provides links to download Elm Compatible Software. This website does not host.