Hi, I'm working on an automated hydroponic system that reads pH levels as well as PPM. Basically, I want the arduino to read the levels every 5 sec and do adjustments: Set pH level = 7.0 Set EC level = 1000 ppm if actual pH < 7.0, activate device x same with ppm I am using the Atlas scientifi…

pH/ORP stamp Atlas scientific

system April 19, 2012, 10:15pm 12

Is there some part of the error message(s) that you don't understand. Ditch the stupid String class!

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