Carl and Richard talk to Daniel Simmons about his work with PasTrak, building RFID tools for small businesses. The first half of the conversation focuses on what RFID is all about - different types of tags, scanners, security concerns, and so on. There's a lot of choice out there when it comes to RFID and its cousin Near Field Communications (NFC). Then Danny digs into the coding side of things - the various APIs you work with to handle different readers, how your code responds, how to deal with duplicate data and data overload...all the fun things that happen when you interact with the real world!