Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
Sounds like an interestign project. I have some experience setting up the MCU port and crossbar for UART applications. Do you have the data sheet for the particular MCU you are using? Do you plan to connect your MCU to a PC a review the data in a hyperterminal session?
sendString("AT+CMGF=1"); // command to select text mode
sendString("AT+CMGS=\"0999999999\"");// here 09999999999 is recepient's number
sendString("Hello!"); // Hello! will be sent