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How to Make a Home Security System Using a GSM Module

This article is a collaborative effort, crafted and edited by a team of dedicated professionals.

Contributors: Muhammad Baballe Ahmad, Mehmet Cavas, Sudhir Chitnis, and Zhen-ya Liu.

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In this tutorial we will show you how to make a home security system using a GSM module. This system can be used to send you an SMS when someone breaks into your house.


Making a home security system using a GSM module is an important task in order to protect your family from potential threats and burglaries. By using a GSM module, you can quickly and easily set up your own personal home security system that can alert you via text message or email when it detects motion. Furthermore, it can act as an alarm system that you can control remotely through phone calls or text messages. This article will help you understand the basics of constructing such a system and give some helpful tips on the design process.

GSM Module

A GSM (Global System for Mobile Communications) module is a wireless module that is used to transmit information over a cellular network. Generally, these modules are used in home security systems due to their ability to send and receive data remotely. In this section, we will talk about how to make a home security system using a GSM module.


Home security systems are an important part of keeping your home safe and secure. Installing and maintaining a standard system can be very expensive, so many people opt for a more cost-effective option. One such option is to make use of a GSM module. A GSM module can be used to design a home security system that functions much like those expensive alarm systems, but at a fraction of the cost.

A GSM module transmits any kind of signal using cellular networks by utilizing specific frequency ranges and protocol standards that are regulated by global telecommunications organizations such as the Cellular Operators’ Association (COAI). These modules enable the exchange of data between two or more connected devices through text messages, voice calls, data transfers and various other applications. Most GSM modules come with built-in GPS capabilities which can be used to pinpoint the exact location of an intruder or suspicious activity in real-time.

GSM modules are easy to install and require minimal setup compared to standard alarm systems. They also have fewer components which results in lower installation costs and maintenance fees. Additionally, using a GSM module allows you to remotely control your home security system via your smartphone, tablet or computer from anywhere in the world as long as you have an internet connection. For even more convenience and protection, some GSM modules feature motion detectors which will automatically alert you when it identifies any suspicious activity near your property or on its premises – giving you peace of mind from wherever you may be in the world!


GSM (Global System for Mobile Communications) modules are a type of technology used in the development of home security systems. These modular devices are compact and can provide users with a variety of important features and capabilities, such as:

-Easy Control and Monitoring: A GSM module provides control over alarm systems from remote locations, eliminating the need to maintain physical presence. This makes it easier to control electronic locks, monitor alarms, check cameras and lights and more.

-Prompt Response Time: A GSM module can send alerts and messages in an instant, allowing users to be quickly informed if an issue arises. This helps increase response time to accidents or intrusions.

-Carrier Backed Security: Many providers have specific requirements that have to be met for using their service for your home security system. When using a GSM module, you’re accessing a reliable carrier backed security service provider so you can be sure your system won’t fail.

-Flexibility: A major advantage of using a GSM module is its ability to scale as needs evolve over frequent additions or decreases in size; this allows scalability of your home security system depending on your exact needs at any given moment.

By leveraging these advantages, homeowners can build creative solutions to satisfy their needs when it comes to security and automation with high quality products at relatively lower costs compared to other readymade solutions normally found available on the market today.


Despite their popularity, GSM modules have some disadvantages that should be taken into account when choosing them for a home security system. First, GSM modules require a compatible SIM card in order to send and receive data, and there may be additional costs associated with the service provider or monthly plans. Furthermore, since most GSM networks depend on cellular network coverage for data transmission, security systems using GSM modules can be vulnerable to interruptions in service due to network outages. Finally, these types of home security systems can be more expensive to install and maintain compared to other types of systems that use hardwired connections between the alarm panel and sensors.

Setting Up the System

When making a home security system using a GSM module, there are a few steps that need to be taken to ensure the system is properly set up. This includes setting up the GSM module itself, connecting the sensors to the GSM module, programming the GSM module to respond to the sensors, and finally testing the system. By following these steps, you can build an effective and reliable home security system. Let’s get started.

Gather Materials

In order to make a home security system using a GSM module, you will need to gather together the necessary materials. These materials include the GSM module, a motion detector, an alarm bell, batteries for the motion detector and alarm bell, wires of adequate length for connecting the components and tools for connecting wires. You should also obtain a SIM card for using with your GSM module and any other relevant tools and materials if needed.

Furthermore, you should consider whether or not you need additional components such as wireless cameras or doorbells to add further layers of protection to your security system. It is also important to consider where in your home you want to install each component so that it is properly placed and protected from any outside threats. Carefully plan out these aspects before proceeding with the setup so that your system runs efficiently and quickly alerting you whenever it detects any suspicious activity.

Assemble the GSM Module

Assembling the GSM module is the first step in setting up your home security system. The GSM module is essential for sending and receiving SMS messages, allowing you to control and monitor your system remotely. To assemble a GSM module, first assemble the components of your kit as per instructions and place them correctly on the PCB. This should include items like the Arduino microcontroller, a USB cable, a SIM card and adapter, and appropriate headers.

Once everything is in place, you can then begin connecting the pieces together. You will need to connect each component to power (3V3) and ground supplies appropriately, before connecting the antenna lead to its terminal. Once that is complete, switch on your Arduino board by plugging it into an appropriate power source via USB cable. You should then be ready to test your hardware further!

Connect the GSM Module to the Arduino

The GSM module is an important element of your home security system as it allows you to set and control the system remotely. It’s fairly simple to build and requires the connection of seven cables to your Arduino. First, you’ll need a DC 12V power supply, which you can plug into any wall outlet at home. If necessary, use a voltage regulator module to adjust the voltage.

Next, connect the GSM SIM card – make sure it is inserted properly and that your daily data allowance is sufficient for your needs. Then attach the antenna (see diagrams). Next, connect pins 4 and 5 on the SIM800L board to their corresponding Arduino pins. Similarly, connect pins 7 & 8 on the SIM800L board to their corresponding Arduino pins and then switch on the power source.

Once everything has been connected correctly, check to make sure that all required components are present by running diagnostic tests within the Arduino software for your specific project. When all components are functioning correctly, move onto programming codes that will enable you to access functions from anywhere in the world via internet connection or an application such as UbiDots/thingspeak or Blynk/ESPHome After successful testing – switch off the power source with its dedicated switch located at the back of power unit before unplugging from its main socket.

Programming the GSM Module

In this tutorial, we will be programming the GSM module to create a home security system. We will be using the Arduino IDE to program the GSM module. Programming the GSM module is an important step to make a home security system since it is responsible for sending out alerts when the system detects an intruder. We will cover the basics of programming the GSM module in this tutorial.

Write the Code

Once you have the GSM module up and running, the next step is to write code that will allow it to interact with other parts of the home security system. The programming language used for GSM and cellular communication devices is Atmel AVR C, a dialect of C and object-oriented programming language.

Using this language, you can create programs that will interact with your GSM module to enable features such as alarm triggering, automatic text message sending from the main controller, automated SMS responses from user commands, and incoming call detection for alerting purposes.

When writing your code for a home security system incorporating a GSM module, there are various specific parameters that must be set in order to enable successful communication between components. These include enabling AT commands in the code; initialization of pins; transmission rate configuration; detecting network availability; setting up common network settings (automers), and validating response codes.

Additionally, based on your specific use case additional snippets of code could be written or integrated into existing streams such as setting up an SMS text message response system. It’s important to understand this coding process before getting started with constructing all the components of your home security system so that everything works together properly for a secure setup!

Upload the Code

In order to get the GSM module up and running, you will need to upload code which is basically a set of instructions that tell the module what to do. If you’re new to programming, this may seem intimidating, but it’s actually fairly straightforward if you have the right software and experience.

Below is a brief introduction on how to upload code to your GSM module:

1. Identify the model of GSM module and download any accompanying software for programming. Each model uses different software so make sure you download the correct version for your module.

2. Connect the GSM module to your computer using a USB cable and open any accompanying software which came with the device (or can be downloaded from online). This will vary depending on your model, but most programs have similar functions such as flashing the firmware, uploading source code and running commands in the serial monitor view.

3. Before uploading source code onto your GSM module, make sure that it is compatible with its operating system (if applicable). In some cases, a language such as C/C++ may be required in order to compile successfully on the device. Check instruction pages carefully as each GSM model has slightly different requirements for programming language and setup configurations in order for them to run properly once deployed.

4. Once everything is set up properly, you can proceed with writing your own custom code or downloading pre-written scripts such as those used by home security systems or others depending on what type of application you are building. As this process can vary greatly based on individual preferences, there are no strict guidelines when it comes down to coding style or specific instructions that need to be followed; however basic protocols such as making sure all commands are written correctly should still be adhered to regardless of project types (as improper syntax could lead events not firing or function results not working). After all necessary coding is finished – save changes before you exit out so that programmed events take effect immediately when deployed outside computers/devices where codes were created/edited from previously .

Test the System

Once you have tested each individual part of the system and verified that they are working properly, it is time to test the entire system. To do this, connect all the components together as per your circuit diagram, then power on the system. Once it is up and running, you can test it by sending a text message from your phone to the SIM card installed in your GSM module. If everything was programmed correctly, you should receive an alert message from the home security system.

You can also use a software emulator to test different communications between your GSM module and other devices. This will allow you to verify that communications are setup correctly with all external devices like sensors or switches used in the security system. Once everything is working properly, you are ready to mount all components in place so that your home security system can be operational at any given time!


A home security system using a GSM module can be a great option for home owners who are looking for an inexpensive method of protecting their property. The system is relatively easy to install and requires only basic technical knowledge or assistance from an experienced professional. Using the custom mobile application and GSM module, your system can be set up to send notifications to your phone with alerts or warnings in the event of an intruder or other potential security risks. Further, you can also receive feedback from the system through SMS which can give you more assurance that your system is performing as expected. Advantages of using this type of security system include its low cost, flexibility in setting up the appropriate settings and response messages, as well as its ability to offer remote access in order to manage settings and check status.

The main disadvantage is lack of automation – you will need to monitor and respond manually whenever indicated actions are required. However, this type of system still offers good benefits and when used with other protective measures at home (e.g., alarms, cameras), you can help increase protection against unwanted intruders or situations in a timely manner. In any case, homeowners should familiarize themselves with local rules pertaining to home security conduct and proper usage before installing any security systems at their residence or business premises.

How to Make a Home Security System Using a GSM ModuleCheckout this video:

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