Cw305 external voltage and firmware


i modified the firmware and vcc int way below 0.60V. so target cw305 now has firmware programmed on it but i am unable to communicate any longer with cw305, even to program new firmware. the usb port isn’t even showing up in device manager.

only messed with vcc int in the firmware. trying to power vcc int externally right now but nothing is showing up in device manager still. what can i do to fix this.