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Forum Post: RE: I2C MSP430FR6989 Launchpad Communication (PLEASE HELP!)

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As it turns out, you were correct. However there were two problems. One was I wired it wrong! Noob problems lol. I lowered the resistance of the I2C resistors to about 7k and that gave me a good clean signal :) Thank you so much everyone! I had one more question. I've noticed when I put the reference clips of the oscilloscope probe to the ground pin of the MCU, it makes the signal a little more staticy, but when I just clip the oscilloscope probe to the I2C pin and leave the reference clip hanging, it has a cleaner signal. Anybody know why that is?

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