Reply To: [Resolved]Unable to open I2C busHome › Forums › Forums › Technical Support for BerryIMU › [Resolved]Unable to open I2C bus › Reply To: [Resolved]Unable to open I2C bus May 13, 2015 at 5:20 am #3945 Mark WilliamsKeymasterThanks for all the info.Have you tried with ‘sudo’ sudo ./compass_tutorial01Mark --OzzMaker.com --