@emily Good ol' forgotten I2C pullup resistors. Just as frustrating as the swapped RX-TX, except at least you don't have to cut any traces to fix the former.
@laogeodritt i have definitely had physical boards made with sda/scl swapped
i am an i2c expert
@emily Oops. Yeah, I forgot about that.
I've done that too. Usually it's when I have different symbols with SDA/SCL in a different order and I copy-paste my net labels to connect them...
@laogeodritt the two i2c signals, dock and clata