I'm sure there is a way around it, but you'll have to figure that one out yourself :) I'm simply suggesting an option for constructing a working demo, not a fleshed out product. In a real-world scenario, readers would be connected over their own communications network (whatever that may look like, i.e. wired, mesh, etc.) and communicate with a central control PC.

Just out of curiosity, why do you need to write to the tags? They will most likely come with a unique ID and getting active tags with read/write memory blocks will probably be more expensive.

If you only have 4 weeks, you're going to need some serious engineering and/or programming skills or you're going to need to go buy a commercial system. Active is the only way to go... meaning you'll need something on each doctor with batteries. Depending on what kind of budget you have, that could be cell phones or laptops with wifi/bluetooth, or a dedicated "locator tag". There are wifi access point systems that provide wireless network access, but also triangulate the position of wifi receivers. That might be the best bet if your docs already have wifi enabled cell phones or laptops on them at all times. Otherwise look into a commercial location tracking product that uses a dedicated "locator" tag.

After reading different sources, i have more and more questions towards using RFIDs and triangulation for tracking/positioning objects.

So lets say I want to try using RFID tags and RFID readers. Would i have to get passive or active tags? Can I just get a passive Gen2 tags since they are better than the previous one (at the moment i dont care about the memory which Gen2 has a lot more but i care about the sensitivity and range)? Once I get the tag, what frequency would I choose? I read that UHF would be better for my application since the higher the frequency, the shorter the wave, therefore, longer range.

But the hard part would be how do i approach the triangulation portion of this since different things can effect the signal and alter the distance? How do i go about that? (i think we can buy a software but i believe they want us to develop it so it costs less).

This is getting harder than i thought. 3 weeks left for my research and it seems i am going in circles.

Also, after reading many sources, I totally agree with you on how RFIDs arent meant to find location/position of a part/tag. But what else is out there that can do that? GPS but thats for outdoors. The ones that you have previously mentioned wouldnt seem to work as well. I think the company should just have a system that knows if the part left a certain location and who has walked with that part.

So what about using RFID tags with WIFI since we already have a wifi network.

Do you use active rfid tags with wifi?

Are there wifi tags or are they the same as rfid tags? (reason i ask because i have seen some wifi tags but they are inside of a plastic case and i just didnt know if it the same thing)

It just seems that using a wifi network with rfid tags would be cheaper for the company and it seems that they have a better accuarcy over rfid readers.

(sorry for asking stupid questions but still in progress of learning about this and reading books)