Connecting 2 Controllers with I2C Protocol

[AllieGrey]

Hi,

I need to figure out how to use I2C Protocol to connect 2 controller boards. Does anyone have a startup guide or tips/instructions as to how to do so?

I am trying to run the print bed with 3 motors and I am also thinking about using multiple extruders. I want to add an extra controller board and I'm trying to understand how to control it.

Thank you for helping!

[Bob-the-Kuhn]

What is the problem that you are trying to fix?

If you want to run more steppers than is supported by your current controller then you have only a few options:

• Replace your current controller with one that supports more steppers.
• Use external stepper drivers.

External stepper drivers require three logic signals each from the controller. They range from $5 boards (that have a socket to plug in a stepper stick) to large self contained units.

[thinkyhead]

@AllieGrey See #4776 (comment)

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