通过串口与手机模块收发短信。已经用sim100测试过，支持8bit,7bit,unicode编码发送接收，软件的其他附属功能已经删除，发送短信的全部功能保留。-through the serial port transceiver module and cell phone text messages. Sim100 has been tested with and support 8 bit, Transfer, unicode coding this reception, Other sof