Multiple Salinity Probes?

Expansion modules and attachments
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Zexston
Posts: 12
Joined: Sun Nov 02, 2014 9:38 am

Multiple Salinity Probes?

Post by Zexston »

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.
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lnevo
Posts: 5430
Joined: Fri Jul 20, 2012 9:42 am

Re: Multiple Salinity Probes?

Post by lnevo »

i don't believe so. Not sure if there are workarounds.
Zexston
Posts: 12
Joined: Sun Nov 02, 2014 9:38 am

Re: Multiple Salinity Probes?

Post by Zexston »

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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