无线模块RF12B 编程手册，指出了规格书上一些误导人的例程。 正确地引导读者写出可用的通信程序。-Wireless module RF12B programming manual, pointed out the specifications on some of the misleading routines. Available to guide the reader to correctly write the communication process.

MD251 MD231G GSM GPRS 模块硬件SPI读写示例-MD251 MD231G GSM GPRS module hardware SPI reader sample