Welcome to EnviroDIY, a community for do-it-yourself environmental science and monitoring. EnviroDIY is part of WikiWatershed, a web toolkit designed to help citizens, conservation practitioners, municipal decision-makers, researchers, educators, and students advance knowledge and stewardship of fresh water. New to EnviroDIY?Start here
I have built a low cost EC sensor using the Atlas Scientific probe. The EZO board for the pH sensor has the same interface so if you look on my recent blog I give all the details you should need. I assume you want to deploy this with battery power and solar recharge so the Mayfly will sleep most of the time. Setup code is included in my blog and you will want this initially to set up the Atlas EZO interface board which provides serial comm to the Mayfly.