Sometimes windows lose the connection to the nRF51 Dongle. The only way I have been able to reconnect to the dongle is by unplugging and replugging it to the USB port. I have tried several dongles and computers. But this seems to be a general issue. The manual unplug/replug is a Little bit annoying when the dongle is a part of an Automatic test setup. Is there any way we can hardware reset it from my source code?