i have an question about pin SCL, and SDA for use,
on this moment i was using the SCL pin and GND to get a Auto leveler for my CNC using BCNC software and Grbl, i use SCL with normal closed
look like this image
but now i have made another Probe to Automatic Zero my tool change Look like this
but my question is, i can use the SDA for the seccond probe signal ? if yes i need edit some thing on bcnc or on GRBL, and where i can find if the pins SCL or sda is normal open or closed.
i dont find nothining about this question on forum, thx so much if u can help me with this, i guess is the question of some folks also.