GSM and GPRS modules are chips or circuits that are used to establish communication between a computing machine or mobile device and a GSM (Global System for Mobile communications) or GPRS (General Packet Radio Services) system. They do this by enabling communication between a microcontroller or microprocessor and the GSM/GPRS network.
GSM and GPRS modules are like GSM and GPRS modems except for one crucial difference: Modems are external devices whereas modules can be integrated or embedded into a piece of equipment. GSM and GPRS modules are therefore known as embedded hardware.
A GSM and GPRS modem consists of a GSM and GPRS module assembled together with other components such as a power supply circuit, indicators and communication interfaces such as a USB 2.0 or RS-232. The communication interface helps to connect the module on the modem with a microcontroller or external computer.
GSM and GPRS modules allow microcontrollers to communicate wirelessly with other instruments and devices. Such wireless connectivity opens up to a wide range of applications including: