EDIT: solve! I had pin 4 and pin 5 of the digital I/O instead of the analog I/O. Stupid!!! Hello, I'm trying to follow the I2C example from this forum and from a couple of other places. A "writer" arduino sends a struct with two integers. A "reader" Arduino prints out the two ints it reads. Hardwa…

[Solved!] I2C to transfer data between two Arduinos Unos

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