How to Interface GSM module with PIC18F4550
Overview of GSM The Global System for Mobile Communication (GSM) is a digital cellular network standard widely used for mobile communication and long-distance data transmission. Various GSM modules are available on the market, including models like SIM900, SIM700, SIM800, SIM808, and SIM5320. The SIM900A module, specifically, enables users to send and receive data over GPRS, …