>
> There may be a function that can look this up, but I think it's hard for
> the API to know what network the app needs to use, although 99% of the
> time the host has a single Ethernet port making the practical choice
> easy. I got the libmodbus 3 unit-test demo to work by just doing a
> ifconfig to to get my IP address and plugged that in. That's all that
> was needed. RTU over TCP is probably a different story. My LinuxCNC
> master could send queries just fine, but the unit-test slave isn't set
> up to return anything interesting. Successes for unit-test demo seems to
> be a lack of error messages.
>
CL requires the address and the port number (9502 id default).
I somewhat understand the address but not really the port number.
Can you elaborate how you found this info? keep in mind I have
almost no knowledge of networks other then plugging in my ethernet cable
in to my cable internet router. :)
Chris M
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