I am working too much lately, and dont have enough time each day to get what I want done so everything has been slowed a bit. The short answer is I have a whole setup running, but I am always improving and am in the process of packaging the main portion with a wifi/bluetooth port to fit into a case. Those stamps will work fine as will phidgets, there are a few caveats you must use UART and if you want to hook more then one rs232 device up you must add another IC to multiplex, with my widgets you need to use a single analog pin/device a couple of my other sensors are I2C. If you wanted a ph widget I could have one to you for about 12 bucks for example. I am trying to get some documention up but work keeps getting in the way
(just as it did right now)