android开发经典书籍，在京东上的书籍要卖232元-Manning.Unlocking Android.2008

android 485通讯，将手机与设备通过usb转232线连接，通过该app可以实时获取数据-Android 485 communications, mobile phones and devices via usb transfer 232 line connection, through the app can real-time access to data