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  1. What i2c device are you connecting? What does is do? What's the device address? (per device specs) Is it really 2? Are you using pullups? I2c requires some type of pullup, and in general, the internal resistors on the '430 devices are not an appropriate value, so external are usually used. Note: by default, i2c comms are on LP pins 9 (SCL) and 10 (SDA) not 15 &&16 - P1.6 and P1.7, Energia defaults to spi on those pins.
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