I can help with this.? First, do you know what kind of RFID card or token is going to be used?? (Is it an existing badge that users already carry, or one where you will be passing cards or tokens out -- such as "one per preset" and... you can select the card technology)?? (if you can select the technology, you might be aware that cards come in multiple formats, including keyfobs, stickers, coin-shaped discs, or other objects, if that helps your use case)
Second, what kind of reader will be used?? Do you get to select it, or do you have to work with something that exists?? If you select it, what's the desired physical format (e.g. a wall mount similar to what you see on doors? a device that sits on a desktop?? something hidden behind another surface?? how compact would you like it?)
As for how it's going to talk to Crestron, you can assume the RFID can be made to send a string to a Crestron serial port (simplest), or a TCP/UDP port (less simple since there will be a network conversion step involved).? Will you be able to work with that on the Crestron side?
For what it's worth, I have an RFID chip embedded in my hand, and love making awesome integrations with it, including with Crestron.? There's lots of options!
