The SDS100 will not do as you ask. But the SDS200 scanner can do as you ask. I know because I’m doing just that. I leave the scanner on and power it with a power source that is on the ignition side of the switch. When my vehicle is off there is no power to the radio. And when I start the vehicle, power is supplied to the radio and reboots to on. I have tried it with the SDS100 with no luck. It would require a USB power source that goes off with the ignition switch to start with. But the radio shuts down when power is removed and requires a manual start once power is restored. So, sorry, it’s not doable.