GSM modules are radio modules that send specific data or information in the GSM network to a GSM receiver, such as a cell phone or smartphone. Depending on the application and field of use, combined GSM/ GPS modules can transmit the location data of ships, vehicles, containers or even people via the short message service( SMS).
GSM modules can transmit triggered alarms in monitored rooms and houses. They can be used in telecontrol and for human-to-machine communication or for machine-to-machine communication as used in the Internet of Things( IoT). Another area of application for GSM modules is domestic patient monitoring or alarm messages in emergency situations. In this context, the emergency call systemeCall, which is installed in new cars, should be mentioned. eCall sends an emergency signal to the emergency call center in case of an accident or health problems of the driver.
GSM/GPS modules are small or larger compact units that transmit data they receive from a data source. Such data, which may come from a GPS system, is transmitted in the module to the GSM transmitter, which then sends it on a GSM frequency. They transmit in the frequency bands specified by the GSM standard at 900 MHz and 1,800 MHz. The GSM modules are fitted with a SIM card and, depending on the technology, can transmit data rates of a few kilobits per second and, with General Packet Radio Service( GPRS) support, up to over 100 kbit/s.
Better known applications for GSM/GPS modules are fleet management, location tracking, positioning and tracking of people, vehicles, ships, containers and other larger goods. Here, the GSM/ GPS module transmits the position data of the GPS system.