I tried bluetooth connection to vemstune, and it comes with some problems due to the way windows handles BT serialports. The bluetooth connection is opened once an application tries to access the com-port, and in this case vemstune has to disconnect from the com-port before switching the bluetooth module off. If i switch off the ECU(that also powers the bluetooth thingy), the port will hang. Currently the only way to get this to work is to always disconnect from ecu before switching the bluetooth device off.