I would double check that you installed the driver properly for your operating system. It seems like your computer does not recognize the device. In the past some users needed to install it twice for it to work. Also make sure the UART cable is disconnected from the SmartInventor board if you have a CoDrone Pro. If you still experience problems, you might have an incompatible USB cable. Did you switch it out by any chance with another one? If you are still experiencing issues please set up a support call here 🙂
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