Let me try this again. It was, and is, in no way ever my intention to be either offensive or demotivating.
The reason I said it feels like you want a step by step guide, was/is due to the fact that you don't seem to take up information unless it's chewed up in nice little chunks.
The Google Spreadsheet is a good example of that. I know and understand that that topic might look daunting at first, but if you had bothered to properly read it, you would've noticed that there are examples in there which tell you what's happening. It's even commented in multiple places. That doesn't mean you should immediately understand it, but saying "I saw there was code" gives me the impression you didn't bother to look at the code itself.
Believe me when I say we share the same "you-can-do-this" mentality. Maybe it's due to some more experience that we can relate to that a bit more realistically. What you're asking us to explain are things that I'm currently being thought in university. They're not easy to understand, albeit still being relatively easy. It's mentioned before, but perhaps you're taking on more than you can handle, without professional/experienced help.
That's not a question that can be answered on a forum. Most of the concepts being applied in the project you're describing take many years of higher education to get even a basic grasp of. What you've currently built is probably also above your level of knowledge, considering the fact that you didn't knew PH and conductivity are related, for example. That's not a bad thing. The project is surely very interesting, but do you actually understand what's happening on a lower level? Ion exchange, chemical reactions, flowing currents, conductivity, Ohm's Law, Transistors, potentiometers, resistance. Those are no easy concepts to understand.
Unless you understood all of those concepts decently, there's no way you could've built that project without a guide of some sort (which is what you've linked to). Again, that's not a bad thing.
The fact that you'd like to add internet connectivity to it, and expand the current project is also very admirable. The only catch lies in the fact that there are again new, and difficult, concepts to learn, for which there isn't a manual/guide this time. Like I've said before, you'll need to think of things on your own. And when the basic knowledge isn't there (yet), that's nearly impossible.
What has changes since? The fact that you removed that text doesn't mean that your questions don't imply the same. If you do not want step by step answers, then what do you want, exactly? "how does this work" is too vague of a question to answer. We've given you ideas on how you could measure PH values (using the conductivity sensor you built), and we've given you several options to get this information on the web (think Google Spreadsheets), which even included a guide how to do so. If you don't want to use step by step guidance, then please do share what exactly it is that you want?
A recent example of this is the question for me to go through the whole Google topic, and lay it out for you in sizeable chunks. That, to me, sounds like you want me to shop it up into steps you can follow. Other than the fact that I don't feel I should be doing your projects, for reasons listed in several posts, I think you could put in the effort to at least try it yourself. If there's something specific you don't understand, then by all means, please ask away. But in order for that to work, we need concrete questions, like:"why do you assign a variable to that?", or "why do we need a function for that?", not something like:"could you summarize the topic for me?".
It's not that we don't want to help, but there's only so much we can do. If the foundation isn't there, then there little to build on. Building a house on quicksand could also be considered "a bit challenging", using your analogy.
Also, it's not just "a bit challenging". Some of the concepts that are being applied is material that's currently being thought to me at a technical university, studying Electrical Engineering and Computer Sciences. I don't consider myself to be stupid, but half of the stuff in there is still black magic to me. If I asked you to explain Quantum mechanics to me right now, or rocket science for that matter, would you be able to to it? Although it might not sound as fancy, it's a least comparable in terms of difficulty. You shouldn't underestimate that.
You've nailed the EXACT cause of the problem. You ARE in a world where you don't understand the language, or the customs and traditions. Is it reasonable to expect someone from the other side of the world, to teach you all that? They can't teach you everything, but they can push you in the right direction. They can tell you to take a course for the language, or tell you to go to the library to study the customs, or mingle with the people to learn the traditions. But he can't do it for you. If you're going to grow in that strange world, you must do so on your own. Getting help and guidance from others isn't the problem, but they can't learn it for you.
The fact that you're "alone" makes it even worse. Try to imagine that you have to teach a three year old how to ride a bike. Sounds reasonable, right? Now imagine that that kid has never seen a bike. It's also deaf, and can't speak your language. Oh, and also, you're going to have to do it from the other side of the world over a computer.
Sounds ridiculous, right? That's pretty much the problem we're facing. It's not that we don't want to teach the kid how to ride it's bike, it's just so hard when there are so many hurdles to cross. Now, If you were there, you could show the kid how its done. You can hold it's bike, and make sure it doesn't fall. You can help where needed. That is REALLY hard to do from behind a computer screen.
That is the reason why we've said you need experienced help locally. Unless you've got someone helping you out if you find problems, and guide you, it's near impossible for us to help you.
Again, I was in no way trying to be offensive, and I apologise if you feel like I was. I hope the above can make you see some of our standpoints, and help you realise why it's such a difficult issue.
I wish you the best of luck in your future endeavours!