Casio DT 900通过MultiDrop实现数据文件的上传与下传。数据通信模块已经封装好，Copy就可以用。-Casio DT 900 data through MultiDrop upload files to download if necessary. Data communication module has a good package, Copy on the can.

Casio dt900的multidrop通讯协议的程序demo.-Casio dt900 The multidrop communication protocol procedures for demo.