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Modbus / Re: Arduino Uno that works with Modbus

« on: April 20, 2019, 03:01:07 PM »

Hi, I'm using this Sketch to interface it to Mach4, it works but I need to configure some Pin as Input for "Read coils (0x01)" or "Read input Discreats (0x02)" but they don't work. What changes should I make?
I apologize for my English but I am Italian. Thank you