DeviceIOControl has failed -- 0x79 (The semaphore timeout period has expired)


  • I am trying to send a VS HCI command to hard-reset a BT module and this error comes up after about 70 seconds..

    The same code works on Win7 and Win8.1 but Win10 doesn't allow me to do a hard-reset by sending vendor specific HCI command.

    Thursday, August 27, 2015 11:31 PM