Hi Luis,

I kinda get what you're talking about

Perhaps what I've done may help

I developed a modular system which took readings from analogue
(and digital) sensors and sent them by SMS to the end user

The core processor is an 18F4550, and plug-in modules are all
18F1320. Originally I used I2C between them but changed this
to RS232. For very remote sensors I used 4-20mA loops or a
433MHz link

Depending on what function is assigned to a module (which can be
hard-coded or set using jumpers) - eg temperature, water level, or
just plain voltage measurement - the module will include that, and
the scale, if any, to the header it sends back to the core. I found it
to be quite a robust system

If you could provide more detail about how you expect your system
to work perhaps I can meet you halfway

Joe
--=20
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.