Multiple Salinity Probes?

Zexston · Post by **Zexston** » Fri Mar 25, 2016 12:20 pm

Is it possible to have more than one Salinity Expansion?

I know there can be more than one pH.

I would like to use a second for a auto salt water mixer.

Thanks.

lnevo · Post by **lnevo** » Fri Mar 25, 2016 12:45 pm

i don't believe so. Not sure if there are workarounds.

Zexston · Post by **Zexston** » Sat Mar 26, 2016 5:48 pm

Thanks for responding.

I've dug in a bit to the electronics (I'm more of a hardware guy). From the schematics, it looks like the same A to D I2C chip is used on most of the expansions. Although I don't see it on the schematics, each expansion's A/D convertor must be slightly different for I2C addressing. According to the datasheet - their are 8 different variants, each with their own address.

Maybe this is the limitation? The I2C hardcoded into the type of expansion?

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