For Eth0, it's the only one that works!!! I've tried every Modbus/TCP interface on Google Play, and this is the only one that will work with the wired Ethernet (port Eth0) under Android. ( I'm using the Belkin USB-to-RJ45 interface sold by Radio Shack.) Android is broken at the Java Connection Manager level, so you need to work at the Linux level. This driver does, and uses a shared database, it's simple to use, and it just works!
Works Not many features, but works well with Fuji Electric AC drives. For what it does, worth the asking price.
Fixed licensing issue where unlicensed error may occur when no internet connection is available