USB port, then Windows might take several seconds to recognize the A-Star bootloader. The
bootloader times out after 8 seconds and goes back to running the sketch, so the upload
might fail if Windows does not recognize it quickly enough. If this happens, try again. If you
are using Windows XP and have not programmed an A-Star on this USB port, you will have to
go through the Found New Hardware Wizard again as described in the previous section, but
the second time you try to upload it should work. If the Arduino IDE has trouble connecting to
the port or using it, try unplugging the device, closing any programs that might be using the
serial port, restarting the Arduino IDE, and then plugging the device back in.
Uploading a sketch to the A-Star using the Arduino IDE.
12. If you uploaded the Blink sketch, then the yellow LED should be blinking once every two
seconds. However, we ship some A-Stars with that same example already programmed onto
it, so you might not be convinced that anything has changed. Try changing the delay values
in the sketch to something else and uploading again to see if you can change the speed of
Pololu Balboa 32U4 Balancing Robot User’s Guide
© 2001–2019 Pololu Corporation
5. Programming the Balboa 32U4
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