MTK常用资料集合, 包含AT命令中的各种缩写, GSM模块SMS相关AT命令使用说明, MTK平台如何生存LIB库文件,申请内存,修改时间等-MTK common data collection, AT command contains a variety of abbreviations, GSM module AT command instructions related to the use of SMS, MTK platform how to survi