Re: RPGLE Socket Communication with Modbus

On Jul 12, 2019, at 11:56 AM, John Yeung <gallium.arsenide@xxxxxxxxx> wrote:

On Fri, Jul 12, 2019 at 11:27 AM Jon Paris <jon.paris@xxxxxxxxxxxxxx> wrote:

Undoubtedly it can be programmed in RPG but given that there are freely available Java, Python, and PHP libraries out there it might make more sense to stick one of those on the end of a data queue and communicate that way.

In case it wasn't clear, it should be noted that the Java, Python, and
PHP libraries are not merely "easier socket programming than doing it
in RPG" (which those languages *also* have). Rather, what I think Jon
is talking about are libraries *specifically for Modbus*, meaning the
tedium and scaffolding required to implement the Modbus protocol
itself are reduced to near zero, and you just have to worry about
getting the *usable data* (a.k.a. "payload"). So, these libraries
allow you to program at the highest possible level, with the least
amount of muss and fuss.

John Y.
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