What is a GSM socket for a smart home, device, operating principle, connection instructions, how to make it yourself

Smart devices that provide comfortable conditions for human life fill the home, office, and cottage. They help control certain processes and take on some of the functions, reducing the amount of daily hassle. For example, an SMS socket controlled by GMS automatically turns off the equipment at a scheduled time.

We invite you to familiarize yourself with the operating principle, design and operating features of a smart socket. Here you will learn how to use your smart device correctly. We will tell you about the types popular among consumers and advise you on how to choose wisely.

What is a GSM socket

A GSM socket is a device designed for remote control of equipment inserted into it using a mobile application, using SMS commands or via an Internet service; it is one of the types of smart sockets.

Thanks to this feature, the device is suitable for a cottage, home, apartment, office and other facilities where remote control of electrical appliances is required.

The purchase and installation of such a device increases the ease of use of the equipment, reduces the risks of fires, floods and other negative consequences.

Advantages of GSM modules

Below are some of the main advantages of using a mobile operator network to manage remote devices compared to other channels: Wi-Fi, Bluetooth or Ethernet.
Ability to control with the simplest phone at hand

(if the device is controlled by call or via SMS). The phone may not have the ability to install a mobile application, connect via Bluetooth or Wi-Fi, but even from the simplest push-button device (for example, the legendary Nokia 3310) you can make a call or send an SMS.

There is no single point of failure.

When using a Wi-Fi network and multiple IoT devices, there is a single point of failure - the Wi-Fi router. A power outage or problem with a telecom operator will make all devices unavailable at once. With a separate wireless connection of each device to the mobile operator’s network, this effect will not occur. Additional redundancy can be achieved by duplicating important devices and connecting them to the networks of different operators.

Control devices from any distance.

Being at any distance, you can observe what is happening and control devices. For example, feed the fish.

Scope of application and main functions

Remote control of the GSM socket allows it to be used in many areas.

Let's highlight the main directions:

Heating system in the house, lighting in the country house. Some models are equipped with temperature sensors that allow you to equip climate control.
Appliances. The use of a GSM socket allows you to be aware of the position of electrical equipment (on/off). For example, using the device you can remotely supply voltage to the boiler or restart the router.
Lighting. A smart device helps in adjusting the operation of lighting lamps. Its capabilities allow you to turn on/off the lights, replacing motion sensors.
Watering. By sending commands to the GSM socket, you can start or pause the irrigation motor.

Above are only some of the options for using GSM sockets for a smart home. The ways of its use are limited only by the built-in capabilities and the buyer’s imagination.

In addition to remote control, such devices have a number of other functions:

Emission of sound when a certain temperature is reached (minimum or maximum parameter). When an alarm goes off, you can quickly call emergency responders and avoid negative consequences.
Control of room temperatures. The presence of this function allows you to maintain the indoor microclimate at a comfortable level.
Climate control. The essence of the option is to automatically adjust the temperature in the room when heating or cooling. In simple words, the temperature parameter is maintained at the same level.
The ability to set a regime. Thanks to this option, the electrical appliance can be programmed to turn on/off after a specified period of time. For example, you can set the kettle to turn on 10 minutes before arriving at your apartment from work.

The presence of such functions expands the capabilities of the outlet and makes it a really useful device.

Also read what sockets with a timer are.

Features of device selection

When choosing an SMS-controlled outlet for your home, you need to determine for yourself the basic criteria that it must meet. So, it is important to decide exactly what functions it will perform, because its cost will directly depend on this.

You also need to immediately decide how many and what kind of sockets you need to buy. This will be a block in the form of an extension cord for connecting a group of electrical appliances in one room, a master+slave set for placement in different rooms, or a single model.

If you just want to experiment with the capabilities of a regular SMS outlet, checking how it turns on and off a heater or an electric kettle/iron, then it will be enough to buy an inexpensive model with minimal capabilities. There is no point in overpaying for additional sensors and other bells and whistles.

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Turning off electrical appliances during power surges

Equipment management in the absence of owners

Device for saving energy consumption

Socket temperature sensor with SMS control

In the case where you plan to leave a GSM-controlled socket in a country house equipped with smart devices to control the autonomous heating system and notify about power supply failures, it is better to turn your attention to models equipped with a backup battery.

The capacity of the batteries can differ radically - you need to choose the one that suits the individual requirements of a particular consumer.

Owners of GSM modules for boilers will not need a smart socket. Our proposed article describes in detail the process of controlling equipment remotely.

This is a good option that will allow the outlet to operate for several hours continuously from its own power source during a power outage. She will not only be able to send an emergency notification about what happened, but will also have time to turn on backup batteries, if they are installed in a particular country house.

Also, if you plan to use SMS sockets according to a specific schedule drawn up for a week/month in advance, then you need to choose models with non-volatile memory. So that a temporary lack of electricity does not disrupt the previously planned action schedule.

One of the important criteria when choosing an SMS controlled socket is its maximum workload. Here you have to take into account the power consumption of the device that will be connected through it. When purchasing a GSM controlled surge protector, you should take into account the maximum permissible load on each channel and the total load on the entire device.

SMS sockets with universal connectors for various plugs can be a real godsend if the house has appliances purchased in different countries. So, you don’t have to buy an additional adapter to use it at home

It is strictly forbidden to exceed the maximum value specified in the instructions for the device. It is better if there is a power reserve of 30%.

Additional sensors and functions increase the cost of GSM sockets. But at the same time, they allow you to create additional conditions for comfortable work without putting in a lot of effort. For example, a built-in microphone and motion sensor will allow you to determine whether strangers are present in the office/home while the user is away.

SMS-controlled sockets are produced by many companies, both domestic, Western, and Chinese. The most popular devices are from manufacturers such as SenseIT, ReVizor, iSocket, ORCAM, Telemetrics, Sapsan, Smart Security, Proline.

Less convenient to use, but still demonstrating progressive achievements in the field of electrical installation, switches with a timer. We recommend that you familiarize yourself with the features of their operation, design and operating rules.

Kinds

When choosing equipment, it is necessary to take into account its types. Let's highlight the main options:

Standard network extension cord. Differs in the presence of two or more conclusions. To use, you need a SIM card with a “plus” balance. After installing the SIM card into the device, check its operation by making a call or sending an SMS. Recommended application temperature is up to minus 20 degrees Celsius.
Single socket. Suitable for connecting one electrical device.
Device with one output. It is used to connect gas sensors / door openings, fire safety, etc. Together with the socket, they create a security system against various force majeure situations.

Modern GSM sockets differ in additional options. These may include a shutdown timer, a heat sensor, recognition of SMS from a specific number, etc.

There are options for the control method: using SMS and phone calls, with manual control and an additional control channel via Wi-Fi.

Devices are also divided into independent, slave and master sockets. The latter have the ability to control other devices (up to 10 pieces).

Device

The GSM socket has a simple design.

It includes:

Frame. In appearance it differs little from the standard plug.
Electronic board with a SIM card connector and a battery holder.
GSM module for controlling the device via phone.
Input plug.
Output (Euro socket).
Control buttons.
Indicators for status monitoring.

Structurally, the SMS socket may change slightly, but the general design approach remains unchanged.

Variety of GSM devices

In the article, we examined the main areas of application of GSM modules and outlined the advantages and disadvantages. Of course, we have considered only a small part of the entire variety of existing GSM devices. There are also GSM temperature sensors, GSM flood sensors, GSM intercoms, GSM reader for access control systems and many others. The choice is huge, and every year there are more and more Internet of Things devices in general, and with GSM modules in particular. With the introduction of 5G into widespread use, this growth will only intensify. An Ericsson report projects 3.5 billion IoT connections across mobile networks in 2023 and says the commercial launch of 5G networks will lead to rapid growth in the mobile Internet of Things (IoT).

How does it work

At the first stage, you need to insert the SIM card into a special slot and turn on the socket. Once configured, it can be controlled using SMS, an application or an Internet service.

Let's look at them in more detail:

When choosing the first option, you need to enter the number of the card used in the smart device into the phone book. For more convenient use, you can create command templates.
The second control method is through a program on the phone. If this option is supported, there should be a download link or QR code on the box. After downloading, the program must be installed and configured.
The third way is management using an Internet site. The user registers in his personal account, from which he controls the operation of equipment connected to the GSM socket. Using the site, you can control devices from anywhere where there is Internet access.

Some models provide a combination of all types of control.

Terms of use

For the SMS socket to function correctly, several conditions must be met.

Let's highlight the main ones:

Minimum humidity in the room.
The absence of metal objects near the equipment, which can lead to a deterioration in the quality of signal reception.
Mandatory grounding in the house when the device power is over 1.5 kW.
It is prohibited to connect outdoors, near the stove/sink.
Taking into account the minimum distance between two smart devices.
Availability of optimal GSM operator coverage.
Fine tuning if an external sensor is used.

Installation of a GSM device is not recommended in rooms with medical equipment, where the use of mobile devices is prohibited, and which contain explosive elements.

For the SMS device to work correctly, you must enter into memory those telephone numbers to which the device should respond. This feature allows you to avoid false alarms.

Preparing a SIM card

To connect to a GSM socket, you must have an existing one or buy a new SIM. When choosing the latter option, please note that some operators require you to activate the SIM. To do this, just insert it into your smartphone and dial any phone number.

If you are prompted for a PIN code, disable the option to avoid being blocked in the event of a reboot.

Next, take the following steps:

Delete all contacts and SMS from the SIM card.
Check your card balance, which should be positive.
Install the temperature sensor into the special connector (if provided).
Insert the SIM card into the slot provided for this purpose and press until it clicks.
Plug your device into a power outlet and add your phone to memory. Send an SMS message to #00# on the SIM phone installed in the socket.
Wait for a message indicating successful binding and the equipment is ready for use.

According to the rules, installing/removing a SIM on a switched-on device is prohibited. Before performing this work, the device must be disconnected from the network and wait until all the diodes go out.

Correct installation of SMS device

After initialization, you need to configure the gsm device. You can do this yourself by following the instructions.

How to set up controls yourself

First of all, the numbers from which control occurs are established. You can add up to 5 master numbers in total. You can enable them in two ways – via SMS and through settings.

The commands required to set the number may vary depending on the model. In most cases, the phone number is added as #number#. A message is sent to the SIM card installed in the socket. The response will come in the form: “The number was successfully entered.” Passwords are set and commands are issued in the same way.

Phones can be added in the same way through the web interface. You just need to go to the appropriate section and enter the required numbers.

What does the market offer?

The leading positions in the GSM sockets market are occupied by the following companies:

China - SimPal, GSM iTimer, Konlen, Waytronic.
RF - Telemetrics, Express Power, Sapsan, Alonio.
Finland - Isocket.
Ukraine - Elgato, Sokol.

Some SMS sockets come complete with an additional service package, for example, connection to the Megafon operator or others. It is also worth considering that when producing equipment in the Russian Federation or Ukraine, the main facilities are still located in China.

Simpal

The Simpal company focuses on the production of wireless equipment. Country of registration: China. The manufacturer's range includes GSM sensors, portable cameras, SMS sockets and other equipment that can be controlled via a mobile application on your phone.

The manufacturer's products are compact and functional.

One of the most popular devices is SimPal T4. This is a GSM socket with remote control via SMS and a temperature sensor. Using the latter, you can maintain the temperature in the room and control the device by setting threshold values. Maximum power 3.5 kW.

Peculiarities:

remote and manual control;
work according to schedule;
informing about turning off / turning on the light;
notification of a weak GSM signal;
support for up to four phones;
interaction with all mobile operators;
translating to Russian language.

Basic parameters:

Input / output voltage - 110 - 230 V / 50 Hz.
Power - up to 3.5 kW.
Protocol / Communication standard - GSM 2G, 850/900/1800/1900/2100 MHz.
The interface and information language is Russian.
Application - iOS, Android.
Operating temperature - from -10 to +55 degrees Celsius.
Dimensions - 110x56x33 mm.
Weight - 85 g.

Reviews about the device are mostly positive. Buyers note quality, convenience and a wide range of functions. The disadvantage is the high price.

Read - what are CCTV cameras with remote access, rating of popular models.

Features of using a smart device

Having an SMS-controlled device at home, you can turn off the lights without getting out of bed, or turn on the coffee maker while in the bathroom. The socket receives a command in an SMS message and turns the device on or off accordingly.

This is not all of its capabilities. For example, you can program the watering of your garden plot to turn on if the air temperature and humidity are below or above a specified value.

You can surprise your friends by turning on the coffee maker a few minutes before returning home. The aroma of freshly brewed coffee wafting throughout the apartment will not leave guests indifferent

Operating principle of a GSM-controlled device

A smart device that accurately carries out the commands it receives is deservedly in high demand in the socket market. After all, there are countless options for use - not only at home, but in the country and in the office. You don't need to be nearby to do this. It is enough to have a stable GSM connection from the desired mobile operator.

The command received in an SMS message from the owner leads to automatic closing/opening of the power circuit by the internal GSM relay of the socket. She sends a response to the owner of the house about the execution of the command. You can also send a command by making a call to the mobile number of the SIM card installed in the socket.

Some gsm models may additionally come with an alarm key fob, which can be used as a panic button

Correct installation of the SMS device

If we compare the socket with remote control via SMS with other smart brothers, we can highlight the ease of its setup and connection. Its installation can be handled by a person unfamiliar with electrical installation and who does not have special tools and skills.

First of all, even before purchasing a smart device, you need to make sure that the house where it will be installed has a stable GSM connection. Then you have to buy a mobile operator SIM card and the socket itself. Be sure to check that your tariff plan allows for sending and receiving messages.

Next, top up the account of the purchased card and disable the request for a password or PIN code at login. Now, having studied the instructions that come with the SMS socket, insert the SIM card into the appropriate slot. All that remains is to install the device at its workplace.

Installing an SMS block with terminal blocks requires the use of certain tools and the application of knowledge (+)

To use the SMS socket, you need to insert its plug into a regular socket to which you will connect an electrical device that requires remote control. After connecting to the network, the indicator light will light up, indicating this event.

That's all - the installation of the SMS-controlled device is complete.

Rules for setting up a GSM socket

After connecting the outlet to the network, you will need to configure the desired parameters. To do this, you need to make sure that the GSM module is working - the corresponding indicator light should be on. Now you need to bind the SIM card number to the device, following the instructions for the purchased outlet.

Correct connection of sensors and socket control settings are described in detail in the manufacturer's instructions

Depending on the SMS socket model, the nuances of its programming will differ. Everything will depend on the manufacturer, on what kind of outlet it is - independent or a set of master + slave.

To correctly set the desired parameters for a specific device, you need to study in detail the manufacturer’s accompanying instructions. This is important, because sockets from different companies are configured differently. Also, depending on the number of functions performed and additional sensors, the number of defined tasks for the device will differ.

Specifics of using the SMS device

For the most efficient operation of an SMS-controlled socket, you must follow certain rules for its use.

First, you need to carefully study the technical specifications, paying special attention to the maximum permissible load. After all, if you connect a heater consuming 3 kW to a socket designed for 1.5 kW, it will not withstand it and will burn out.

To protect yourself and your family, you should not exceed the maximum value that SMS sockets can withstand. Most often, this type of device is designed for 3-3.5 kW; it is rarely found at 5 kW. This characteristic must be contained in the instructions.

Some manufacturers indicate the maximum permissible load on the back of the socket, next to the plug.

Secondly, you cannot connect such sockets outdoors, near a stove or washbasin. Water and dust will cause them to malfunction. And exposure to too high temperatures can cause internal components to explode.

The operating temperature of these devices is different - from -20 to +99 degrees. These values may vary depending on the model, but no SMS socket should be thrown into fire.

Thirdly, each model is capable of receiving commands from a certain number of control numbers. This depends on the individual technical features of each outlet. To prevent reactions to calls and messages from unknown callers, you need to enter the required numbers into the internal memory.

Some models of SMS sockets provide protection against random calls and spam mailings. They implement the function of receiving and responding only to those subscribers whose numbers are entered into the internal memory. All others will be ignored. It’s a pity that not all outlets have such capabilities.

Fourthly, if a set of main and slave sockets is used, then one should not forget about the maximum and minimum distance for their location from each other. The manufacturer indicates these values in the list of technical characteristics of the device. Otherwise nothing will work.

Fifthly, good GSM coverage of the operator is required. Without high-quality communication, remote control from a mobile phone is impossible.

Some smart plug models do not support SMS control. Special mobile applications are used to send commands and monitor their execution

Sixthly, if there are external sensors, you need to correctly configure the commands, using the instructions from the manufacturer, so that the socket works the way the user needs it.

Telemetrics

Telemetrics is a company known for the development of security systems, control and remote control of various equipment. Additionally, the manufacturer produces equipment for security systems, including wireless security sensors, GSM alarms and other devices.

The company's products allow you to solve the following problems:

Ensuring security: monitoring objects along the perimeter, informing premises owners and security companies about the penetration of strangers, the appearance of smoke, gas and liquid leaks.
Saving electricity: remote control of thermal equipment by changing their parameters.
Telemetry: monitoring of environmental characteristics, for example, pressure, humidity, etc.
Telecontrol: control the position/status of various equipment using a program on a smartphone.

One of the manufacturer’s popular models is the Telemetrics T40 GSM socket. Externally, it looks like a regular adapter with a socket for connecting one device. The package includes the socket itself, a temperature sensor and instructions.

Technical specifications:

GSM networks - 900/1800 MHz;
control of up to four sockets;
control using a smartphone;
informing about the appearance/disconnection of 220 V;
automatic operating mode taking into account temperature;
enable/disable according to schedule/timer;
rated current up to 16 A;
informing when the temperature changes above / below the planned parameter;
temperature measurement range from -10 to +50 degrees Celsius;
size - 6x12.5x7.5 cm;
weight - 180 g.

Control is available via software, so access to an outlet and direct line of sight are not required. In addition, there is no need for separate data receivers, because information comes and goes in text form from a mobile device.

The setup is done using the Telemetrics program, available on Google Play and the App Store.

If you have a simple smartphone at hand, you can use special codes for setup. After logging into the application, you must enter the phone numbers of people who will have access to remote control. The main number belongs to the administrator, and the others belong to ordinary users.

For the device to operate, you must insert a SIM card into a special slot. In the future, the GSM socket can respond to calls or SMS messages. To implement the last method, you need to set the appropriate settings.

Additional options:

Input power control. Allows you to control the availability of electricity. This is an important point for cooling and heating devices, alarms, fire protection and other systems.
Changing the timer/schedule operating mode. The option is useful for running regular processes. Examples: turning on the boiler / boiler, starting irrigation, activating an alarm, etc.
Working by temperature. The sensor in the device monitors this indicator and reacts based on the settings. Most often, the owner is informed of a deviation from the regime.

In general, the Telemetrics T40 socket stands out for its versatility, small dimensions, ability to carry a large load and convenient control program. At the same time, the manufacturer guarantees support and assistance if difficulties arise. The only downside is the high price.

Rating of the 10 most popular

There are a huge number of GSM sockets, each of which has a focus on one function: temperature control, backup power, user-friendly interface, variety of functions. Therefore, among the following 10 models, everyone will find one that suits their taste and budget.

10th place: ELANG Power Control

This socket can measure temperature outside the housing, which has light indicators for the status of the GSM network and relays. So it can be connected to air conditioners and heaters. The device can operate on AA batteries for some time if the power supply stops. In this regard, this model is the best among its competitors. Indicators and connectors are conveniently located on the front side of the device. Prices start from 3200 rub.

Variable supply voltage, V	Maximum load, A	GSM frequencies, MHz	Temperatures measured	Operating temperatures	Backup power	Dimensions, mm
190-250	16	850/900/ 1800/1900	-55° to 150°	-30° to 50°	3 AA batteries	958080

ELANG Power Control

9th place: IQ Socket Mobile

This socket has a colorful design and a built-in thermometer. It can be controlled not only via GSM network, but also via Bluetooth. You can also set a password on IQ Socket Mobile, install a maximum of 12 devices that can control the device (the largest number among the dozen). This is good news for those who want to make the device more accessible to others. The model has many other functions, but they are unlocked after purchasing an extended and full firmware license for the program. Price – 5490 rub.

Voltage, V	GSM frequencies, MHz	Max. load, A	Backup power	Size, mm
90-240	850/900/1800/1900	16	No	1406555

IQ Socket Mobile

8th place: GSM socket with SimPal T20 thermometer

The socket is designed minimalistically, with 2 sensors and a small plug-in plastic temperature sensor. Power on and off times can be adjusted days in advance according to the calendar as well as the ambient temperature. All this can be done through the SimPal application, available on Google Play. The outlet reports all changes, including temperature, through notifications to the phone. In terms of user-friendly interface, “SimPal T20” looks very advantageous compared to its competitors. But there is also a negative side: this model can only be controlled by a phone with a Tele-2 SIM card. The cost starts from 2590 rub.

Voltage, V	Max. load, A	Max. load, kW	Working t	Dimensions, mm
220	16	3,5	-10° to 55°	6012537

SimPal T20

7th place: GSM SMS socket ORCAM R3

This interestingly shaped SMS socket, rounded at the corners, can be controlled either via SMS or using an application available on Google Play and the App Store. There is also an off button on the top. The operating temperature range is quite wide, which distinguishes this model from others. The maximum load is a little lower than others, but this loss is small. Prices start from 4890 rub.

Voltage, V	Radio frequency, MHz	Max. load, A	Max. load, kW	Working temperature	Permissible humidity	Dimensions, mm
100-220	868	13	3250	-20° to 55°	Less than 80%	1368144

ORCAM R3

6th place: GSM socket “Telemetrics T20”

This is a Russian device, on which two indicators are discreetly located on the front side and 2 connectors on the sides. The program includes a calendar and timer. The maximum number of connected smartphones is 5. “Telemetrics T-20” responds to changes in temperature and voltage by sending an alert to the connected phone. Settings are changed through messages and a special application. Cost from 3690 rub.

Voltage, V	GSM frequencies, MHz	Max. load, A	Max. load, kW	Working t
220	900/1800	16	3,5	-10° to 50°

Telemetrics T20

5th place: GSM socket with temperature sensor SimPal-T40

The next SMS socket is similar to the previous one, but, unlike the others, it has manual control, as well as a wide temperature range, the largest among all those listed here. However, it is important to note that this model works exclusively with Tele-2 SIM cards. The outlet also accumulates reserve energy, which is enough for the owner to receive a notification that the device is disconnected from the network and have time to do something about it. The price starts from 4300 rubles.

Voltage, V	GSM frequencies, MHz		Max. load, A	Max. load, kW	Working t
220	800/900/1800/1900/2100		16	3	-25° to 55°
Permissible humidity		Offline mode		Dimensions, mm
10-90%		2 minutes		1105633

SimPal-T40

4th place: GSM Socket Telemetrics T4

The device has two indicators, the connectors are located on the sides. It turns off when a certain air temperature is reached. The device also has a timer. You can download the application to your smartphone and control the device using it. Like the device above, Telemetrics T4 has the ability to accumulate energy to send a notification to the owner if the outlet is disconnected from the network. There is a manual mode. Cost from 3690 rub.

Input power parameters, V, Hz	Maximum load, A		Maximum load, kW		GSM frequencies, MHz		Operating temperature
220, 50	16		3,5		850/900/1800/1900		-10° to 50°
Storage temperature		Permissible humidity		Offline mode		Communication protocol
-20° to 60°		10-90% without condensation		2 minutes		GSM PHASE 2/2+

Telemetrics T4

3rd place: GSM socket SC1-T 16A with temperature sensor

The next SMS socket is very different from others, not only in design, but also in functions. This model places special emphasis on a temperature sensor located on a 1m cable. The device has several temperature control modes. That is why this model is best suited for thermoregulation. There is also a manual control mode (shutdown and reboot). The SIM card is inserted from above. The model is available for different forks. Prices start from 2990 rub.

Voltage, V	Max. load, A	Max. load, kW	Dimensions, mm
110-220	16	3	1067164

GSM socket SC1-T

2nd place: SMS socket MegaFon GS1

This socket has 3 indicators (power supply to itself and the connected device, GSM network status). You can control the device if your phone also has a SIM card from Megafon. Just enter the code #159#1# and all the characteristics recorded by the device will appear. It is worth noting that compared to other SMS sockets, this one is quite large, even visually. Cost – 3600 rub.

Voltage, V	Max. load, A	Max. load, kW	GSM frequencies, MHz
220	16	3	900/1800

SMS socket MegaFon GS1

1st place: Alonio T6 GSM socket

This model, like many others, has its own removable plastic temperature sensor. You can set a password, a timer, and a special time when the device will work. You can also find the Alonio app with advanced features on Google Play. Supports up to 5 phones. There is a manual mode. The functionality is quite wide, which is why the price is high - 5950 rubles.

Voltage, V	GSM frequencies, MHz	Max. load, A	Max. load, kW	Measured t
220	850/900/1800/1900	16	3,5	-10° to 50°

Alonio T6

What does Aliexpress offer?

There is a huge selection of GSM sockets available on the AliExpress website at an affordable price. Before purchasing such equipment, study the functionality and give preference to models with the SMS option and the possibility of use in Russia. A lot of useful information can be gleaned from user reviews.

For example, you can choose the WayTronic device. The cost of the device at the time of writing is about $26.

There are two models to choose from - with English and Russian versions. For residents of Russia, the second option is more preferable.

Functions:

support for GSM SIM cards;
sending an SMS command to control the nest;
the presence of a temperature sensor and, as a consequence, the function of measuring it;
sending SMS to receive information about energy consumption;
SMS notification in case of voltage failures and power restoration;
remote temperature request;
option for measuring electricity consumption;
Russian and English;
the ability to install one main and several additional numbers;
5V output interface.

Characteristics:

power of connected equipment up to 2.2 kW;
operating voltage from 110 to 250 V;
measurement temperature from -10 to +50 degrees Celsius;
GSM parameters - 900, 1800 MHz;
maximum operating current - up to 10 A.

Tariffs for GSM sockets

Devices are controlled using a GSM socket by communicating with a SIM card installed inside. That is why, for reliable operation of the equipment, it is important to choose the right operator and choose the optimal tariff.

If the equipment is installed outside the city, you need to pay attention to the signal level.

If there is no coverage, it is better to give preference to another operator, because you cannot count on stable and reliable operation.

When choosing a tariff, consider the following components:

Subscription fee. Today, many companies offer special services, including MTS, Megafon, Tele2, Beeline and others. In all cases, there are several tariffs available, the parameters of which change periodically. Before connecting, you must separately clarify this point.
SMS messages. This is a key parameter, because it is with its help that “communication” with the device occurs. Through messages, you can give commands to turn off electricity, turn on/off certain sensors, leave the temperature range and solve other problems. The cheaper SMS, the better, and the more money you can save.
Inbox. Today, almost all operators offer free calls, except when the SIM is outside the home region. In this case, roaming tariffs apply.
Outbox. When using a GSM socket for heating, the device can call the subscriber's phone. Such calls are rarely made, so costs may not be taken into account.
Connecting to the Network. There is no need for an Internet connection. Hence, pay attention that the operator does not activate any unnecessary package.

Today there are several options available (tariffs are subject to change):

Megafon offers the “Go to Zero” tariff. Calls within the region are not charged. There is no subscription fee. After connecting, all extra packages for maximum savings. When actively sending SMS, you can activate the SMS S option. In this case, you can send up to 100 SMS to phones in your home region.
Beeline. Optimal options Zero doubts and Signal with a low cost of SMS. Moreover, the SMS package is provided free of charge. There is no daily subscription fee.
MTS. This provider offers a Per Second tariff. You can immediately connect a package of SMS messages for 100 pieces.
Tele 2. The Favorable package tariff with no monthly fee and favorable conditions for customers is available here.

What can smart plugs do and why are they needed?

The concept of a smart home has been exciting the heads of modern city dwellers for many years now: it seems that the first tablet PC was released not so long ago, and today with its help you can already control various devices in the house: lawn sprinklers, smart locks, smart light bulbs, smart sockets, after all . The uprising of the machines, however, is a long way off - so far we only see benefits from smart plugs. To add an extra twist to your home in the form of such a device, you only need nothing: a wi-fi router to connect an outlet to the Internet, and a smartphone or tablet to carry out remote control.

A smart plug can:

Turn off electrical appliances when the network overheats and control energy distribution. By manually setting consumption standards, you will no longer overpay for electricity if you suddenly forget to turn off any electrical appliance.
Turn off and turn on using a signal from your smartphone - you just need to press one button, wherever you are. Now no irons forgotten in a hurry and turned on are no problem. And at home you will always have a hot kettle waiting for you; you just need to connect it to a smart socket and use your smartphone to turn it on before coming home.
Turn on and off according to a schedule. It is especially useful if you regularly need to heat a room, for example, a home greenhouse.
Automatically turn off faulty electrical appliances to avoid short circuits.
Monitor the condition of the electrical appliance. Any abnormal increase in temperature and fire will be immediately detected, a notification will be sent to the smartphone and a fire alarm will be activated (if such a system is installed).

Is it possible to do it yourself?

If desired, a GSM socket can be easily made with your own hands using Arduino or using a GSM relay. This topic requires separate consideration, but we will look at a brief algorithm of actions.

Take the following steps:

Prepare the necessary tools. You may need a standard set. It includes screwdrivers, pliers and a current indicator. A GSM relay is also required if the assembly is based on it.
Insert the SIM card into the switch.
Route the necessary wires from the device to the electrical receivers. Secure the device in a place convenient for you.
Wait for the SIG LED on the relay body to blink. This indicates a successful search for a cellular network.
Press the SET button until STA flashes. Then release it and call the SIM within 30 seconds.
Make the necessary settings from the selected number using SMS commands.
Set a master password via SMS command.
Connect the phase to COM, and the controlled contacts to NO or NC. Please note that if connected to NC, the device will always be turned on, and NO will be turned off until a control command is issued.

The main mistakes when assembling with your own hands are connecting a phase to NO or NS, trying to connect a zero instead of a phase, and exceeding the power. These and other errors can lead to equipment failure.

Socket controlled via cell phone via GSM (SMS or call) GSM Remote Power Switch

The device allows you to control the power of any devices (plugged into an outlet) remotely, via SMS or calls to the cell number of the SIM card inserted into this device. All you need to do is insert SIM cards, plug the device into a power outlet, press the SET button, call the device and that’s it. Now your phone is in the list of available for management. Each call changes state from on to off and vice versa. If you want to control via SMS, send a command to change the password: SN0000NEW1234, where 0000 is the old default password, and 1234 is the new password. To add your phone to the list of those available for control via call: SN1234SET1234567890 where 1234567890 is the phone number, BUT... it’s better to use the first method by pressing the SET button and calling within 90 seconds, since I can’t say for sure in what format to write the number.

To change the state, send SMS: SN1234CHANGE and receive a return SMS with the status after the switch has been completed, to turn on the power SMS: SN1234ON, to turn off SMS: SN1234OFF, to receive the current state without changing SMS: SN1234CHECK

Actually everything, it works. The downside is that it is a specific plug (Australia, it seems), which even with an adapter will most likely require another adapter to be inserted into our socket.

On the plus side - it does not require money on the SIM card or Internet traffic, it drops the call from the first second, which most likely will not require money even on the phone from which it is controlled. In the case of SMS, money on both cards will of course be required to pay for SMS.

Photos from different angles and with adapter and SIM card

Back view:

Front view:

Assembly type:

See below for full command descriptions. It turned out to be quite simple to use; I read the description on the product page, although the kit included a piece of paper with instructions.

Instructions included

But it is better to look at the instructions on the product page.

By the way, the parcel arrived in 27 days, which is not bad considering the average speed to our city is 1.5 months.

Pros: - Works correctly - Does not require money on the SIM card - SW button for manually switching the ON/OFF state Cons: - Specific plug (there was no adapter included) - SIM card sticks out of the case

Currently I have attached the device to the IP camera so that I can turn it off if desired (when broadcasting to the network is not desired) and turn it on or reboot if it freezes. Can be used with any other device with current consumption up to 10A. You can turn on small heaters, turn on lighting, emulating presence, and reboot remote points that sometimes freeze and require a reboot. You can remotely turn off equipment at night. Or you can simply make fun of your friends and acquaintances by quietly connecting some device through such an “adapter.” There are many possible uses. I have similar devices controlled from a radio remote control or operating on set timers, but the application there is a little different, but here you can turn on the computer at home, being thousands of kilometers away, and then turn it off (unless, of course, you have a configured UPS that will make such a shutdown correct and then turns on the computer when power appears).

If you have any questions, ask.

Bottom line

In conclusion, let’s summarize and consider the pros and cons of GSM sockets in terms of their functionality.

The advantages of such devices include ease and simplicity of installation, no difficulties in setting up, autonomous operation and control of the electrical network.

It is also possible to remotely control various devices (for example, the device can be used for a heater, boiler, boiler and other equipment).

The disadvantages of the device are that it is tied to voltage and the GSM signal. In the absence of any of the factors, functionality is significantly reduced.