ARM开发板，android系统通过4个RS232（或USB）口同时收发数据。-ARM development board, android system via four RS232 (or USB) port to send and receive data simultaneously.

是一个单片机蓝牙开发案例，android系统4.3以上，手机支持蓝牙4.0，搜索，配对，连接，发现服务及特征值，断开连接等功能。(Is a single-chip Bluetooth development case, more than 4.3 of Android systems, mobile phones support Bluetooth 4, search, matching, connection, discovery services and feature values, di