> Ah, that explains it. I've seen similar SMS-based
> messaging system byt they had quite strickt
> rules to how to write the messages to the "device".
> In that case it was setting/clearing digital I/O lines,
> but the principle was the same. more or less. You
> could also query the status of the input lines. Anyway...

I've looked around at what's available and added the
best features of those (when they actually have a feature
that's even worth considering) to my units, as well as
incorporating a much fuller command set and features that
all the others lack, whether it be in the h/w configuration,
ease-of-use etc.

Additionally this is being done with a patent holder and
mobile service provider, which should keep competing
products at bay


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