Do you have pullup resistors on the I2C pins? That error occurs when there's a problem writing to I2C, so at least at that point, there's no software issue - it'll be some kind of electrical problem.
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Do you have pullup resistors on the I2C pins? That error occurs when there's a problem writing to I2C, so at least at that point, there's no software issue - it'll be some kind of electrical problem.