This paper introduces a hardware circuit design method for a home security wireless monitoring alarm system. It uses the SM89516A single-chip microcomputer as the core, and processes the alarm information (smoke, fire, theft, etc.) collected by the sensor by controlling the receiving circuit composed of the decoding chip PT2272 and the RF receiving module. It controls the TC35 module to receive and send instructions and data between the legal user\'s mobile phone and the monitoring alarm system in the form of GSM short messages. The alarm has the functions of on-site siren alarm and wireless alarm. This paper explains the working principle and overall design of the wireless monitoring alarm system, and analyzes and designs each module in the system. The system has the advantages of real-time performance, high reliability, simple installation, maintenance and operation.
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