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Home > Solutions > Smart City System > STC12C control smart home appliance anti-theft system application circuit

STC12C control smart home appliance anti-theft system application circuit

The anti-theft system designed in this paper uses STC12C series high-speed 1T single-chip microcomputer as the control core of the entire system. It is responsible for the control and management of each intelligent anti-theft module in the home. If an abnormal object or personnel invades, it can also be controlled while starting a high-intensity sound alarm. The GPRS module SIM300 in this system automatically dials a set call or sends a text message to realize the intelligent remote alarm of the

With the development of economy, people's demand for anti-theft, anti-robbery, and fire-proof security equipment is increasing, and the alarm system has also developed from the original simplicity and localization to the intelligent and integrated development. The anti-theft system designed in this paper uses STC12C series high-speed 1T single-chip microcomputer as the control core of the entire system. It is responsible for the control and management of each intelligent anti-theft module in the home. If an abnormal object or personnel invades, it can also be controlled while starting a high-intensity sound alarm. The GPRS module SIM300 in this system automatically dials a set call or sends a text message to realize the intelligent remote alarm of the system. At the same time, the remote controller can also realize the remote control of the system by making a phone call or text message, and control and manage the power supply or other devices in the controlled area, so as to protect the safety of personal home property.

GPRS communication module

The GPRS communication module in this design uses a three-band GSM/GPRS module SIM300, which is suitable for developing some GSM/GPRS wireless application products, such as mobile phones, wireless MODEM cards, wireless POS machines, wireless meter reading systems and wireless data Transmission services have a wide range of applications. The SIM300 module has a set of standard AT commands, including general commands, call control commands, network service related commands, phonebook commands, short message commands, GPRS commands, etc. The communication with the GPRS module in this system is connected through the serial port, and the data communication between the system and the module is realized by processing the corresponding AT commands.

  In the system, the corresponding interface board circuit of the SIM300 module is designed. The circuit board mainly contains the necessary peripheral circuits of the SIM300, 4.2V voltage supply circuit, SIM card socket and RS232 ($780.5000) serial port level conversion circuit. The function of this module is to receive the information sent by the mobile phone through the antenna, and communicate with the main control CPU of the system through the serial port to determine whether there is an AT command to read the short message. After the single-chip microcomputer reads the short message successfully, the main control CPU of the system analyzes the information. Deal with it accordingly. Similarly, when the anti-theft system sends out an alarm signal, the main control CPU sends out an alarm and controls the SIM300 module to send corresponding information.

                                    Figure 2    SIM300 peripheral interface part of the circuit

The design adopts the enhanced high-speed single-chip STC12LE5A60S2 as the controller and SIM300 as the wireless GPRS communication module to realize the remote control of the system, and the wireless module is used to communicate between each anti-theft module and the system. The system can remotely monitor the status of each module by dialing a designated mobile phone or sending a short message. In abnormal situations, the system can be operated remotely to implement corresponding control commands.

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