Recently, I want to write a program in VB.NET, using GSM module to send and receive short messages. Which expert can write it and ask for help? ......

I wrote before, using vb to send weather forecast to colleagues regularly through GSM module.

Mainly divided into two parts.

1 is a component that calls VB, so that it can support the reading and writing instructions of com.

2. Find a mobile phone that supports com communication, please read the instructions of this mobile phone in detail.

Then submit the instruction to the com port in VB according to the AT instruction of com.

You'd better bring a database to save your messages. )

Then collect the returned codes, judge whether the message is sent or not, and make further judgment.

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The whole process involves com communication instructions. Please carefully refer to your mobile phone model and the corresponding command code. It can also be tested through the system's own accessory-communication-super terminal. This is what I used to use.

The code also involves the conversion between Unicode and Chinese characters. There are ready-made codes to use. You can search them.

There is also a question about the setting of SMS center, which should also be available online.

Needless to say, I believe you can handle the problem of programming.

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Good luck with your thesis writing.