- Remove the Jumper for I2C
- Also use 4.7K resistors as pull up resistors to 5V for the I2C lines (connect a 4.7K resistor between analog 4 and 5V and analog 5 and 5V). Here is why: http://errantengineer.blogspot.com/2007/07/pullup-resistors-how-and-why.html
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