The Airedale I/O Expander for FluidNC

This is an add on board for FluidNC CNC controllers. It uses (2) I/O pins from your ESP32 to add 18 additional pins and an RGB LED. It also has a connection for a pendant or smart display.

Features

• (8) opto isolated inputs
• (8) 5V outputs (PWM capable)
• (2) MOSFETS 40V 8A (PWM capable)
• (1) RGB LED that you can connect to output features, such as status indicators.
• LED indicators on every input and output.
• Terminal blocks on all I/O for easy connection
• (1) RJ12 UART input to connect to your controller
• (1) RJ12 UART output to connect to your pendant or smart display
• (1) 6" RJ12 cable to connect to controller

How do I connect it to my controller.

It was designed to connect to controllers that support our standard RJ12 UART interface. This is the same connector people have been using for pendants and displays. It does not need a special version or compile of FluidNC.

• Original 6 Pack
• 6 Pack for external motor drivers.
• 6x controller
• 4x TMC2209 controller
• 2x TMC2209 controller

You can also connector it to other controller that can directly connect to (2) ESP32 pins. Be careful with the wiring. Miswiring can break both your controller and this expander.

What can it be used for

The response time is very fast at typically less than a millisecond. It can be used for just about any input or output, except for stepper motor control pins (they require microsecond response times.)

How do I set it up.

There is an comprehensive wiki page that tells you how to use each feature. You should probably read it before buying the Airedale.

Open Source

See the wiki page for links to the design and firmware source files.