The NGT20 works for almost any device if you have the right software. The library, however, was not originally designed to work on non-AVR MCUs. This is one thing in the design process back in spring I never thought about because I don't use the Arduino IDE for anything else. Well, recently I was asked a question regarding the library's support of ESPs. I don't actually own an ESP, so I borrowed one from my friend. The ESP itself has so many problems and keeps rebooting, I can't even test my library! I thought I might as well get my own ESP, but what about other MCUs that are programmed from the Arduino IDE, but aren't AVRs? To begin testing that I ordered two dev boards from @SparkFun Electronics, their ESP8266 Thing and an Arduino 101. Since I really need the library compatible sooner rather than later I got 2 day shipping, so I should hopefully have an updated library by the end of the week.