Hi Matt, On Fri, Jan 07, 2011 at 10:33:34PM +1030, Matt Baker wrote: > Unfortunately though I discovered that the device I am using to do the > Modbus conversion supports Modbus/TCP for interfaces connected > directly, but provides a Modbus RTU over TCP for other external Modbus > serial devices.
I thought that's what Modbus/TCP was, the Modbus protocol encapsulated in a TCP stream rather than written to a serial interface. How is this "RTU over TCP" thing different? Is there an additional protocol layer? > Before I start going into this too far I was wondering if you had any > thoughts on how difficult it would be to modify collectd to do this? I'd actually implement this for "libmodbus" first, then adapt collectd / the Modbus plugin if necessary. Author and maintainer of libmodbus is Stéphane Raimbault who is very likely a much better help with anything Modbus related than I am ;) Best regards, —octo -- Florian octo Forster Hacker in training GnuPG: 0x0C705A15 http://octo.it/
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