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SIM900 GSM GPRS Shield

The SIM900 GSM/GPRS Shield is a popular module used to add GSM (Global System for Mobile Communications) and GPRS (General Packet Radio Service) capabilities to microcontroller-based projects, such as those built with Arduino. This shield allows for wireless communication over cellular networks, enabling projects to send and receive text messages (SMS), make voice calls, and even access the internet via GPRS.

The SIM900 shield uses a SIM card (from a mobile network provider) to communicate over the 2G GSM network. It has built-in features for SMS, voice calls, and data transfer. The shield is easily integrated with microcontrollers like Arduino via serial communication (UART), making it simple to control through AT commands (which are used to control GSM modules). The SIM900 shield also provides various pins for connecting antennas and power, and includes a micro-SIM card holder.

Common uses for the SIM900 GSM/GPRS Shield include remote control systems, SMS-based applications, tracking systems, IoT (Internet of Things) projects, and emergency alert systems. It’s ideal for projects that require cellular connectivity but do not need the higher data speeds of 3G or 4G networks. The SIM900 shield is versatile, inexpensive, and popular among hobbyists and developers seeking to add wireless communication to their embedded systems.


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