Single chip microcomputer gsm sends short messages

The first thing to look at is which GSM module. I once made a computer serial link GSM module, which was used to send and receive information, make and receive calls and surf the Internet. You can send the at command through the serial port. Just adjust the serial port and baud rate of the single chip microcomputer and GSM interface, and you can communicate. Generally, it should be AT instruction. If you send AT commands, it will be fine, such as atd calling and sending SMS commands, but it is a bit troublesome to encode SMS. You can search for short messages online. Generally speaking, module manufacturers will have data sheets, so you can contact them. With the data manual, everything will be easy. In fact, it is estimated that the GSM module is also a single chip microcomputer or arm, plus a radio frequency circuit. As long as it is used as a general component, it is not very complicated.