I am trying to interface a mega with a due per I2C. I have done: grounds are shared. SCL/SDA on mega 2560 (not 20/21) are connected to SCL1/SDA1 on due. SCL/SDA of due (20/21) are connected to an imu bno055 which is working fine. no pull up resistors are connected. on mega I do: #include ..
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