I've done I2C at that distance, it works pretty well, I usually use
redundancy to help catch errors (read from the same device 10 times). About
the most important thing though is don't go to fast, I clock at around 2kHz.
While the signals on the line are pretty ugly they are clean enough for all
my I2C devices to react normally. TTYL

> -----Original Message-----
> From: pic microcontroller discussion list
> [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Tim Thompson
> Sent: Tuesday, April 02, 2002 02:40
> To: PICLIST@MITVMA.MIT.EDU
> Subject: [PIC]: Ling distance i2c between a pair of '872s?
>
>
> Hello all,
>
> I'm working on a project where I will need a pair of 16F872's
> communicating
> at a distance of about 30ft wire length.
> I was thinking of using the i2c on them both, since i'm familiar with the
> code required for this, but was wondering how reliable i2c would be over
> that distance? ANyone have any better ideas, bit-banged serial, etc?
>
> Thanks again,
> Tim Thompson
>
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