GSM modem is an industrial-grade modem that supports GSM wireless communication. It can be connected to the operator's GSM network by inserting the operator's SIM card to realize wireless GSM call, SMS, data and other functions.
The basic principle of GSM MODEM
The core module of GSM modem is actually the core module of the mobile phone. In fact, it is also an important module supplier for GSM mobile phones. Therefore, when it is powered on, the built-in software of the GSM modem starts to work. If a SIM card of a mobile operator is inserted, the GSM MODEM is completely connected to the mobile communication network as the mobile phone. At the same time, the computer can connect to the GSM MODEM through the serial port, for example, through the Hyper Terminal, you can connect to the user interface of the GSM modem, through a set of AT commands, you can operate the GSM modem, send and receive text messages. In fact, you can also make calls, send and receive faxes, etc.
The main purpose of GSM modem is to send and receive short messages, saving time for sending short messages, and messages can be sent within a short time. In addition, it is small and convenient to carry, no need to go online, as long as the phone has a signal, it can send and receive short messages via the connection with the computer. Compared with ordinary mobile phones, this set of equipment has more advantages, because it is fully functional, it can be used for secondary development programming, and can be applied in different industries.
GSM modem products are widely used in M2M industries such as IoT industry chain, industrial automation, information dissemination, such as remote meter reading and centralized meter reading of smart grid, municipal street lamp control, water conservancy and hydrology monitoring, financial mobile POS terminal, energy (energy, water supply, heating, etc.) remote pipe network monitoring, water conservancy and hydrology monitoring, meteorological monitoring, environmental protection, intelligent transportation, intelligent home, media advertising release, digital medical, seismic monitoring, industrial remote sensing telemetry, fire safety, real-time online detection of coal mines, oil fields data collection and other fields.