I have been struggling with the occasional lockup problem of the OBDLink device. To be fair the device is probably not designed for continuous high speed operation as we do in PriiDash. I am copying info from this original thread: https://www.scantool.net/forum/index.php?topic=5027.90 The symptom of the lockup issue is that the device stops responding to commands and keeps sending the same message to the PC. At this point the only cure is to disconnect both the USB and the OBD cables. Then reconnect them. There is another, much less frequent issue, but I nevertheless noted it in the post below, that the device would reset itself. The reset undoes some of the initialization steps of PriiDash. In this case one has to click the Go/Stop button twice to stop and re-initialize the device.