I've been trying to get this to work on Raspberry Pi using ADC module but I've switched over to Arduino as price is about the same. Since I've gotten close with the RPi and have all of the calculations and calibrations in Python on RPi (including temp), I'll probably keep it all there and just use Arduino to return raw values and calculate on RPi side with Python - leaving the thermometer there as well. I'll need all 8 analog channels on Arduino for other sensors.
I am very interested in your probe and if you've got a kickstarter idea to launch it, please include it on the forum. I will contribute. Do the three channels the probe needed include the thermometer? I know for my project I need all 8 analog channels for the 4 four sensors but if I can get EC and pH probe in 4 channels it would work (or there might be other work arounds).
Wawa: Arduino Nano is powered through USB. What is the best way to get the most accurate voltage reading before the sensor for comparison?