Before you connect a Wixel to a computer running Microsoft Windows, you should install the drivers:
Windows 8, Windows 7, and Windows Vista users: Your computer should now automatically install the necessary drivers when you connect a Wixel. No further action from you is required.
Windows XP users: Follow steps 5–9 for each new Wixel you connect to your computer. You will also have to follow these steps again the first time you run an actual Wixel app on the Wixel.
After installing the drivers, if you go to your computer’s Device Manager and expand the “Pololu USB Devices” list, you should see an entry for the Pololu Wixel USB Bootloader.
If you see the “Pololu Wixel USB Bootloader” entry in your device manager, it means that your Wixel is in bootloader mode. Your Wixel should go into bootloader mode when you first plug it into USB, because there is no app on the Wixel by default. Once you have loaded an app onto the Wixel using the Wixel Configuration Utility, and the app is running, then you will not see the Pololu Wixel USB Bootloader entry in your Device Manager. The entry you see in the Device Manager will depend on the application that is loaded on the Wixel. Some apps might not enable the USB interface, in which case you will see no entry for the Wixel in the Device Manager. However, typical Wixel Apps will appear in your Device Manager as a single Virtual COM port (with product ID 0x2200) in the “Ports (COM & LPT)” list as shown below:
In parentheses, you will see the name of the port (for example, COM5 or COM6). Some software will not allow connection to higher COM port numbers. If you need to change the COM port number assigned to a Wixel, you can do so using the Device Manager. Bring up the properties dialog for the COM port and click the “Advanced…” button in the “Port Settings” tab. From this dialog you can change the COM port assigned to your device. Windows will remember which COM port was assigned to which Wixel using the built-in serial number of the Wixel; a given Wixel will always get assigned to the same COM port regardless of which USB port it is plugged into.