(. This paper studies the communication of WMOi3 dual-frequency integrated GSMModem and ATMEL89 series single chip microcomputer, clarifies the underlying principle of the GSMModem module sending and receiving short messages and the underlying process of controlling the GSMModem sending and receiving short messages through the single chip microcomputer, and gives the hardware circuit and software termination of the single chip computer to control the GSMModem module office. process,)
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