Send Text Messages or SMS using Modem in VB.Net

This Send Text Message or SMS in VB.Net project is a 100% free source code. I believe that this is the best answer to your problem of how to send SMS Messages using VB.NET.

It will be a big help for those who are planning to develop a system that has a Sending of SMS messages feature.

Like if you are doing an RFID Based attendance monitoring system with an SMS Notification System System.

The system is created using Visual Basic 2008.  The Sending of SMS messages is through GSM Modem that is connected to your computer.

In this project, I am using AT commands which are used for communication between the computer and the modem.

Output when running the Send Text Message VB.Net

send text message vb.net Sample Send

Sample Screenshot of TEXT Message received in Mobile Phone.

send text message vb.net

How to Send an SMS Message Using VB.Net?

Send Text Message VB.Net

  • Download the Source below

    Download the VB.Net Projects with source code extract it and place it where it is accessible to you to locate.

  • GSM Modem (SmartBro or Globe Broadband)

    You need to attach the GSM Modem to your PC/Computer

  • SIM card with a load

    Of course, in order for you to send text messages in vb.net, you should make sure that your sim card attached to the modem has a load.

  • Make a Proper Configuration

    Make sure to set properly the COM ports. In my case, I am using COM11. Like as shown below.Comport

Downloadable Source Code

Conclusion

In the near future, I will be creating a step-by-step tutorial on How to Send SMS messages using a GSM Modem.

If you have any questions or suggestions, please feel free to contact me on our contact page or simply leave a comment below.

The source code you may like:

Frequently Asked Questions

How does this VB.NET project work?

Built with VB.NET WinForms (.NET Framework 4.5+) and SQL Server backend. Standard structure: Form designer to code-behind event handlers to ADO.NET data access layer to SQL Server. Login form for auth. Ready to extend for BSIT capstone scope.

What Visual Studio and SQL Server versions does this VB.NET project require?

Most projects use VB.NET WinForms on .NET Framework 4.5+ with SQL Server 2012 Express or higher. To run: install Visual Studio 2019 / 2022 (Community is free) with the ‘Desktop development with .NET’ workload, install SQL Server Express + SSMS, open the .sln file, build, run.

How do I set up the database for this VB.NET project?

Open SQL Server Management Studio (SSMS) and connect to your SQL Server (e.g. localhost\SQLEXPRESS). Right-click Databases, choose Restore Database OR New Database then import the included .sql script. Update the connection string in App.config (or in code-behind Module) with your server name + credentials. Rebuild and run.

Can I use this VB.NET project for a BSIT capstone or thesis?

Yes, VB.NET is one of the most accepted languages by Philippine BSIT panels. Extend it: add role-based access (admin/staff/customer login redirect), Crystal Reports or RDLC reports, dashboards with Chart control, audit log, multi-branch support. Pair with Chapter 1-5 documentation matching your panel’s rubric.

Why am I getting ‘connection error’ or ‘cannot find SQL Server’?

Three common VB.NET issues: (1) Connection error: SQL Server isn’t running. Open SQL Server Configuration Manager and verify SQL Server (SQLEXPRESS) service is started. (2) Wrong server name in connection string. Try .\SQLEXPRESS, (local)\SQLEXPRESS, or your machine name. (3) Login failed: SQL Server is set to ‘Windows-only’ authentication. Switch to Mixed Mode in SSMS Server Properties, Security.

Where can I find more VB.NET projects with source code?

Browse the VB.NET Projects hub for the full library. For C# WinForms alternatives see C# Projects. For ASP.NET web alternatives see ASP.NET Projects. For BSIT capstone idea lists see 150 Best Capstone Project Ideas.

22 thoughts on “Send Text Messages or SMS using Modem in VB.Net”

  1. hello sir…tested the program and i think the program work properly…however I cannot receive message…do I need to install the setup from the modem? oh by the way my modem is Smart Bro Broadband Dongle…

  2. hi sir…I think the program works properly…however I still can’t receive any message after I sent it…do I need to install the software of the broadband? is there any configuration on the modem? oh i’m using smart bro broadband…hoping for your positive response sir…this would be a great help….thank you in advance

  3. Hi sir, Do you know how to encrypt decrypt double transpotion cipher in vb. I have 3 textboxs for plaintext, keyword, ciphertext and 2 buttons for encrypt decrypt

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