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..

用单片机触发串口报警短信.doc

• We are an exchange download platform that only provides communication channels. The downloaded content comes from the internet. Except for download issues, please Google on your own.
• The downloaded content is provided for members to upload. If it unintentionally infringes on your copyright, please contact us.
• Please use Winrar for decompression tools
• If download fail, Try it againg or Feedback to us.
• If downloaded content did not match the introduction, Feedback to us，Confirm and will be refund.
• Before downloading, you can inquire through the uploaded person information

Nothing．