Hi, I am embarking on a project that requires a UHF RFID reader with an Arduino. However, all I found on Sparkfun and Adafruit are 125khz or 13.56 mhz frequencies, which does not have a strong enough range for this project. I found some UHF RFID on china sites but I'm afraid they might be too difficult to interface with Arduino (noob here).
Can anyone advice on the UHF RFID modules I can purchase?
Thanks so much in advance.
jj_huang:
I found some UHF RFID on china sites but I'm afraid they might be too difficult to interface with Arduino (noob here).
Why do you say that? Perhaps post details and let some members give their advice on those units' interfaceability?
I found the Cottonwood UHF RFID reader, which has some documentation on its site and the forums. Will that be easy to interface?
UHF RFID Reader:
http://store.linksprite.com/cottonwood-long-range-uhf-rfid-reader-uart-iso18000-6c-epc-g2/
I found another UHF RFID reader, which is smaller and I would prefer to get this. However it's from China and not much documentaion found online.
CHina UHF RFID Reader:
http://www.aliexpress.com/item/usb-to-uart-rfid-uhf-reader-module-ISO18000-6C/32411250075.html?spm=2114.031010208.8.35.yA7Jm1
would greatly appreciate your advice guys 
That last one has a USB interface. That means it can only work with an Arduino if you have a USB shield and more importantly the driver software to control it.
The first link says it is serial TTL comparable and so that would be better to interface to an Arduino.