Need help please any source code please
I don’t understand the question, can you elaborate on it further?
How to connect gsm module to Visual basic? Any source code? Or how to code in visual basic using AT command? Please help
Sorry, I have no experience with Visual Basic, maybe someone else on the forum can give a hint. Do you need to specifically use Visual Basic? What most people here do is to program Arduinos and other microcontrollers/electronic boards, usually with C++ or C, maybe Python.
Since you are using a serial terminal, I assume you have a Serial-to-USB converter as an interface between the GSM module and your PC. So I would probably start by looking at a Serial library for Visual Basic, that will allow you to communicate your software with the module.