Using a 3.51 ver Shield and am having difficulty with I2C communication and it appears to be due to a loading on the SCL line.
With the shield not plugged into the UNO, the SCL line has a measured resistance to ground of 10.6K.
It looks like this is related to one of the LED's on the board, to which it shows continuity.
I would like to clear this loading but before I do any surgery, I would like to know the specific reason for this loading resistance. I really just want a clean connection to A5 with nothing hanging off it.
Perhaps a circuit diagram showing the LED arrangement would be helpful.
I am using the shield as a basis for 3 steppers but not for CNC.
Any advice would be appreciated
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