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1  Using Arduino / Networking, Protocols, and Devices / Modbus ASCII Implementation on: December 11, 2012, 02:24:07 pm
Hi, I'm new with the Arduino development so maybe I'm a little bit confused, anyway here it goes.

I'm working in a machine controlled using and Arduino, it's likely that this machine will be controlled by a remote PC or a PLC. I need to expose some control, reading and writing commands using the serial protocol.

The control commands will be only a few, mostly to change status or clear warnings. I also need writing commands to change parameters and reading commands to watch some signals.

I was looking some different protocols implementations and I think that Modbus is a good fit, and there is some libraries that works with Arduino but those are for the RTU version. I think that the perfect fit will be Modbus ASCII, the problem is that I didn't find any library or development for this version on Arduino. someone knows about any?

I just don't want to expend a huge amount of time doing something that someone already did.

My second thought was modifying the Modbus RTU slave library to use the ASCII standard, do you thing that this is a good idea?

Thanks in advance for any help.
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