Hi,
Please make sure that you purchase BNO055 from authorized distributors such as Digikey, Mouser, Arrow and Future, etc.
If you cannot read BNO055 registers 0x04 and 0x05 to find out the SW revision, then the BNO055 is not working. If you want to reflash BNO055, then you need to use Atmel Studio IDE, JTAG box, BNO055 FW image from Bosch and the extension board from Bosch. Please refer to https://www.bosch-sensortec.com/media/boschsensortec/downloads/application_notes_1/bst-bmf055-an001.pdf for more information.
Thanks.
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