Description: 89C2051 here the basic role is to detect external road many wired alarm sensor alarm level signal, and one-to-one into the " COMSMSXX" command, and finally from the serial port to 9600BIT/S, 8, N, 1 format sent to JB35/JB35G, trigger JB35/JB35G " alarm settings (2)" in the alarm message. 89C2051 mouth lines because of the restrictions, we can only extend the road 12 parallel port external sensor input, if users need to put all 20 into a parallel road input, then I use more lines to achieve single-chip microcomputer, such as 89C51, etc..
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用单片机触发串口报警短信.doc
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