GSM socket - how to turn it on remotely and create the effect of presence at home

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.

Overview of GSM modules

Various GSM devices have been part of our lives for a long time; in this section we will talk about GSM devices for various purposes and give examples of specific models.
Below about: • GSM alarms • GSM modules for access control • GSM control for a heating boiler • GSM modules for a car • GSM switches • GSM sockets

GSM alarms

The basic set of GSM alarms must include a controller and, depending on the configuration, may include video cameras, motion sensors, door or window opening sensors, smoke or water sensors. If there is no need for additional sensors, you can purchase a basic alarm kit and later equip it with additional sensors. Equipping alarm sets with additional sensors is a tribute to the goal of making devices more versatile. In some alarm models, controllers, in order to reserve a channel, can be equipped with 2 or 3 slots for SIM cards.

Unlike alarms connected to the security company's remote control, GSM alarms have only one notification channel - mobile communications. That is, if this channel is unavailable, the attacker will be in the room unnoticed. Alarms connected to the security console have additional connection channels: Wi-Fi, Ethernet, wired telephone line, and GSM is used as a backup channel. However, you need to take into account that remote security is a mandatory subscription fee and a fee for each call. If we compare GSM alarms with conventional alarm analogues (without GSM and connection to a security panel), the latter can only be designed for inexperienced attackers, therefore, it is advisable not to consider this option at all.

Below are 3 popular models according to Yandex.Market.

• Carcam GSM alarm kit - price 3990 rubles The kit includes a GSM module, a Wi-Fi module and 2 wireless sensors: an infrared motion sensor and a magnetic contact sensor for opening a door or window. The sensors connect to the main control panel at 433 MHz. Control via a mobile application is supported.

• Sapsan GSM 4G CAM - price 25,749 rubles GSM alarm system with sensors and 2 outdoor video cameras. The kit includes a control panel, an outdoor Wi-Fi camera, a motion sensor, a window opening sensor, an arming/disarming remote control and a set of antennas. A special feature of the device is the ability to work as a Wi-Fi router. Control is available via a mobile application.

• Ajax Hub Kit Black - price 14,990 rubles The kit includes a central panel, a motion sensor and an opening sensor. Additionally, you can connect up to 100 devices. The sensors communicate with each other via a secure wireless channel.

In general, the topic of security alarms is much broader and more interesting than the context we are considering in this article; they are used to protect a home, perimeter, warehouses, shops, and each case has its own specifics.

GSM modules for access control

These are universal devices to which any blocking device can be connected: automatic gates, barriers, turnstiles, card readers, electromechanical or electromagnetic locks, mailboxes and elevators. Controlling similar devices without GSM support requires being in close proximity to them. For example, if you went on vacation or are in self-isolation, and someone needs to get into an area with limited access, it won’t be difficult to open a barrier, turnstile or room remotely.

GSM modules have gained great popularity in entry control systems for villages and residential complexes, commercial facilities with a significant number of subscribers. They can control any automatic blocking devices - barriers, bollards, gate automation.

Below are three popular devices according to our customers.

• Eldes Esim 320 2G/3G - price 15,900 rubles This is a stand-alone GSM controller for controlling a barrier (gate) from a phone. The device can be controlled from a phone, via a WEB interface or mobile applications.

• DoorHan GSM 3.0 - price 10,250 rubles The module is designed to control barriers, drives, lighting systems and other types of electrical equipment. Supports transmission of remote commands via NO, NC contacts.

• Pal SG314-GI-WR - price 25,999 rubles This is a universal controller that can safely be considered the pinnacle not only in price, but also in functionality. The controller has the ability to connect a reader with a Wiegand 26 output interface, an unlimited event log, an unlimited number of users through the use of a special application, and supports work with non-copyable remote controls.
  Pal SG314-GI-WR allows you to open the actuator not only using a telephone call (call), but also using the PalGate mobile application (available for iOS and Android), a proximity card and a non-copyable remote control with encryption based on the AES 128 crypto protocol .

  Due to the ease of spoofing a phone number, the manufacturer does not recommend using a phone call as an access method; by default, this option is disabled and to use it you need to activate it, but of course you shouldn’t do this as this will greatly simplify the task for potential attackers. PAL ES devices are configured only through a cloud personal account. Setting up and controlling the device is possible from any computer, tablet or phone with Internet access from anywhere in the world; no configuration software or preliminary settings are required.

  Devices are added to your personal account by serial number. Their number in each account is unlimited. An unlimited access log is kept in your personal account, events in which are stored for an indefinitely long time, allowing you to see who, when and using some type of identifier (dialer, application, remote control, card) opened the actuator. Information in real time is sent to the manufacturer’s servers.

We have conducted a detailed comparison of GSM devices from different manufacturers, and if you are faced with the task of choosing, you should familiarize yourself with them as the difference in functionality is enormous.
• Comparison Eldes Esim vs Pal Es • Comparison DoorHan vs Pal Es • Comparison Leader GSM vs Pal Es

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:

1. Heating system in the house, lighting in the country house. Some models are equipped with temperature sensors that allow you to equip climate control.
2. 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.
3. 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.
4. 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:

1. 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.
2. Control of room temperatures. The presence of this function allows you to maintain the indoor microclimate at a comfortable level.
3. 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.
4. 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.

Remote control, smart home. SMS+socket=gsmrozetka 8 812 509-3975 (St. Petersburg)

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Modern technologies in your home.
The Internet, and regular stores, are overflowing with solutions in the field of Smart Home . Beautiful boxes, thick volumes of instructions, sets of software and cables for connection. Special integrator companies can easily double the cost of a complete solution. Special people - consultants, are always in touch and ready to help you with advice on how to remotely turn on this light bulb in the garage using a smart remote control with five dozen buttons. And now, having played enough, you, in the old fashioned way, go down to the garage and flip the switch. Smart home has become too smart. Too slow or too unreliable. Choose for yourself. We are convinced that the time has come for simple devices. Ordinary in appearance, but damn cunning inside. Devices that are no different from those you are already used to using, but have some additional capabilities. Opportunities that will never hinder you. Meet - gsmrozetka - controlled socket - Remote control A regular extension cord (pilot or pilot), which is 'endowed' with some additional 'smart' functions: from your cell phone you can (via SMS) remotely turn on or off any of the sockets. for example: - in winter, on the way to the dacha, turn on the heater, and on a hot summer day turn on watering the flower beds, and then, after some time, turn it off. — turn on and off the lighting in a house or apartment during your departure, simulating your presence. - control via SMS of other loads - remotely reboot the computer - remotely reboot the computer - remote control of electrical appliances - remote control of sockets - remote control via gsm - remote control via sms sms It is possible to receive remote SMS when entering a controlled room (your summer cottage, in winter , unvisited period) or if the temperature goes beyond the specified limits (the same dacha in winter or a server room when the air conditioners fail). If you work in the IT field, you may have encountered the need to reboot a frozen server (access point/router/switch). By the way, there is a 1U version. Free software update for GSM socket via GPRS (at your request) The cost of one set is from 4,800 rubles. No monthly subscription fee.

Kinds

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

1. 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.
2. Single socket. Suitable for connecting one electrical device.
3. 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).

How to choose SMS sockets

When choosing an outlet, you need to determine in advance what load you will connect to it, this will allow you to determine the power of the device. After this, you need to choose a control method. Sockets that can control electrical appliances according to a given program or in timer mode are preferable, but if this is not required, you can take a less complex option. When choosing a socket, make sure that it is suitable for working with your operator, because 4 frequencies are allocated for sending SMS: 900, 1800, 2100 and 2400 MHz. Read more about the distribution of cellular frequencies in the article GSM and 3G signal repeaters for the country. Make sure that the cell station signal is of sufficient strength (at least 2 bars on the display of your smartphone, phone or tablet). If the signal strength of one operator is too weak, check the network of another operator or install a repeater in your home. Do not choose cheap models, especially if they perform many functions, such devices are not reliable.

Certificate of conformity for GSM sockets

Using such outlets may result in electrical shutdowns, short circuits, or fires. If you buy an outlet in a store, remember that all products that are legally produced in Russia or shipped from abroad must be registered in accordance with the consumer protection law. The packaging must indicate the purpose of the product and its characteristics, place of production, postal and email address of the manufacturer to which complaints can be sent. In addition, the box with the device must contain instructions in Russian and a warranty card filled out by the seller. If these requirements are not met, you have a counterfeit socket whose real characteristics are unknown. In addition, all serious manufacturers of SMS sockets certify them and supply them to the seller along with a certificate of conformity. If this document is not available, you are looking at products from an unknown or unreliable manufacturer. It’s up to you to decide whether to buy it or not, and to be responsible for the consequences.

Smart GSM sockets bring many benefits. They allow you to remotely control the operation of electrical appliances and automatically turn the heating on and off. Their installation fully fits into the concept of a “smart home” - increasing the comfort of living and improving the energy efficiency of the building.

Device

The GSM socket has a simple design.

It includes:

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

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

Disadvantages of GSM modules

GSM modules also have disadvantages.
Let's look at the main ones. SIM card fee and the need to control the balance.

Each device is a separate expense item. Operators often require you to regularly perform paid actions so that the SIM card is not blocked. In addition, the balance on each SIM card must be controlled so that the operator does not limit communication capabilities and it is possible to access the device via the mobile Internet, SMS or by call.

Unstable connection in unfavorable weather.

Electromagnetic radiation from a thunderstorm front can affect signal quality, and lightning can potentially damage a telecom operator's equipment. The event is unlikely, but possible.

Impossibility of use in remote areas and isolated rooms.

Remote areas are places where there is no stable coverage by mobile operators. Isolated rooms - basements, rooms shielded by metal structures and other places where there is no possibility of receiving a radio signal from the base station.

Cyber ​​threats.

If the device is controlled by call or SMS, an attacker can spoof the number and gain access to control peripheral equipment. A search reveals many similar services. When using more advanced equipment that supports control via a cloud service mobile application, such risks are automatically eliminated.

Jamming the cellular network signal.

Special equipment for jamming the signal from the GSM module to the base station will prevent notification of intrusion. Such equipment is also widely available for sale.

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:

1. 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.
2. 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.
3. 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.

Operating principle of a GSM controlled device

When a SIM card is installed in the gsm device, the outlet must be connected to the electrical network.
You can install any device that will be controlled in it. It is important to ensure that the electrical outlet is designed for the power of the equipment being connected. If control will be carried out via SMS, you should write the number in the phone book and create a message template with commands. When working through the application, you need to install the appropriate program on your smartphone. A link to it should be in the user manual or written on the box. After installing the program, you can start setting up.

Terms of use

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

Let's highlight the main ones:

1. Minimum humidity in the room.
2. The absence of metal objects near the equipment, which can lead to a deterioration in the quality of signal reception.
3. Mandatory grounding in the house when the device power is over 1.5 kW.
4. It is prohibited to connect outdoors, near the stove/sink.
5. Taking into account the minimum distance between two smart devices.
6. Availability of optimal GSM operator coverage.
7. 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:

1. Delete all contacts and SMS from the SIM card.
2. Check your card balance, which should be positive.
3. Install the temperature sensor into the special connector (if provided).
4. Insert the SIM card into the slot provided for this purpose and press until it clicks.
5. 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.
6. 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.

Using smart plugs in an apartment

Initially, a smart socket was created for the home: to control the operation of kettles, washing machines, water heaters and other household appliances. It is especially useful for “forgetful” citizens, so that they always and everywhere know for sure that the electrical appliance is turned off. Parents can “command” the computer in the children’s room from work, monitoring the time it turns on and off. Moreover, many smart

sockets allow you to connect additional sensors to a special connector: motion, door opening, smoke, gas leaks and others. And the additional output is for low-voltage equipment, for example, a siren. When the sensors are triggered, a notification will immediately be sent to the subscriber’s phone. In addition, the device will help reduce the amount of electricity consumed.

SIM card must be purchased separately. You can choose any mobile operator and any tariff. As a rule, you choose a tariff with expensive calls and cheap SMS messages, since the device only sends SMS messages. If someone uses a family tariff, then a GSM socket can be connected to it. Choose an operator available in your area. If cellular communication is poor and unreliable, install an additional antenna to strengthen the GSM signal.

What does the market offer?

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

1. China - SimPal, GSM iTimer, Konlen, Waytronic.
2. RF - Telemetrics, Express Power, Sapsan, Alonio.
3. Finland - Isocket.
4. 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.

Gsm device: features of choice

To choose the right smart plug, you should use the following tips:

• You need to pay attention to the manufacturer. It is better to buy products from well-known brands that have been tested by many users. Little-known Chinese products will not perform their functions fully and will last a shorter period of time.
• Look at the functionality. If a person only needs to turn an electrical outlet on and off on demand, it makes no sense to buy a model with many additional functions.
• Number of connectors. It is first necessary to decide which devices the user will control. Based on this number, a GSM socket with a suitable number of connectors is selected.
• Power. You should find out the total power of the connected devices and, taking into account the resulting load, select an outlet. The power reserve must be at least 30% of the rated value.
• Software You need to pay attention to the ability to set an operating schedule and select the temperature mode.
• You need to buy the device only in specialized stores that have licenses and warranty service.
• You should pay attention to the degree of security. For the kitchen you need to select models with a high IP level.
• The box should contain Russian-language instructions for use. If it is not there, the device was produced by an unreliable manufacturer, and it is not recommended to buy it.

Most modern models are equipped with a temperature sensor and timer.

Smart with SIM card and temperature sensor

Sockets with a temperature sensor can measure the microclimatic features of the room and send them to the user.
Using the device, you can prepare optimal conditions in advance - for example, turn on the heating or air conditioning. When the temperature value increases, a message will be sent to the user. When buying a socket with a temperature sensor, you need to visually inspect the device. It is advisable that the sensor is located outside the device body. Its location directly on the board threatens inaccurate measurements due to overheating during operation.

With timer

Recommendations for choosing an outlet with a timer:

1. You need to decide on your purpose. For example, for short-term automation (watering plants), you can purchase a model with mechanical control. For long-term automation with an accurate schedule, you need an electrical outlet with a timer.
2. When purchasing, you need to pay attention to the number of on-off cycles. Models from the mid-price category with electronic control can be turned on and off 5-7 times a day.
3. You can purchase a device with the additional ability to generate random numbers. This option is used to simulate the presence of residents in the apartment by turning electrical appliances on and off. This helps protect your home from attempts by scammers.

A socket with a timer is not only a convenient device for controlling electrical appliances, but also an element of a security system.
The GSM power socket is designed to make the life of users easier and more comfortable. It makes it possible to remotely control equipment, work according to a given schedule, and control the temperature in the room. The smart socket can be controlled via SMS and via an application on a mobile phone. The controls are simple, anyone can use 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:

1. 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.
2. Saving electricity: remote control of thermal equipment by changing their parameters.
3. Telemetry: monitoring of environmental characteristics, for example, pressure, humidity, etc.
4. 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:

1. 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.
2. 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.
3. 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.

How the SMS socket works

Any such outlet consists of:

• forks;
• sockets;
• GSM receiver;
• temperature sensor;
• switch.

How the SMS socket works
This device is made as a single unit. Depending on the number of connection points, this device is made either small-sized, inserted into an outlet, or large. All main blocks and the general structure of these devices are the same. The plug is necessary to connect to a regular outlet and obtain a voltage of 220 volts. The sockets of the device are designed to connect any devices of appropriate power, equipped with suitable plugs.

The GSM unit receives SMS from a mobile phone, smartphone, tablet or other similar devices and controls the operation of the switch. The SIM card that is inserted into this unit turns it into an analogue of a mobile phone with its own number. Most GSM sockets can be controlled using buttons on the front or side panels.

The temperature sensor determines whether the power consumption is exceeded and whether the device is heating up. When overheating is detected, it sends a signal to the switch and disconnects the device from the electrical network. The switch provides connection and disconnection of the load to the 220 volt network. The total power of all devices that can be connected to such an outlet depends on the characteristics of the switch. Therefore, the maximum power of conventional sockets for a single-phase network does not exceed 3–4 kW. To switch a more powerful load, you will need to connect it to the outlet via a contactor.

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:

1. 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.
2. 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.
3. Inbox. Today, almost all operators offer free calls, except when the SIM is outside the home region. In this case, roaming tariffs apply.
4. 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.
5. 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):

1. 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.
2. 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.
3. MTS. This provider offers a Per Second tariff. You can immediately connect a package of SMS messages for 100 pieces.
4. Tele 2. The Favorable package tariff with no monthly fee and favorable conditions for customers is available here.

TOP 5 best smart GSM sockets

The most popular smart socket - Xiaomi Mi Smart Power Plug

The Chinese company Xiaomi does not lag behind its competing manufacturers and presented the Xiaomi Mi Smart Power Plug. A distinctive feature of this model is its compactness, ease of use and versatility.

Controlling the Xiaomi outlet and, accordingly, the equipment connected to it is possible from any place where there is an Internet connection. The remote control function is convenient and safe, because now you don’t need to worry about the light or iron not being turned off. You just need to install the Xiaomi Mi Smart Home application and synchronize with your mobile device and Wi-Fi network. The application supports Android and iOS platforms. You can control energy consumption using the built-in smart timer option, which allows you to set a specific time for the device to automatically turn on and off.

The minimalistic design of the smart socket will suit any interior: small dimensions (63x55x35 mm) and a white glossy coating made of durable thermoplastic that can withstand temperatures up to 750°C. The panel has universal inputs, including a USB connector. A blue indicator light indicates a successful connection.

The manufacturer took care of additional safety from children in the form of built-in protective curtains, as well as automatic shutdown when the device overheats. The last option is controlled by a temperature sensor, which sends a notification to the smartphone when the device temperature is elevated.

Price: ₽ from 1000

Multifunctional smart socket – TP-Link Smart Plug

TP-Link has long been known to consumers as a reliable manufacturer of network equipment, including in the niche of smart plugs. The functionality and operating features of this model will be clear even to those who have never held such a device in their hands. The design is simple - just insert the nozzle into the socket and immediately proceed to setting it up.

The TP-Link Smart Plug is configured using special software. First, we connect the outlet itself to the wireless network, and then configure it from the smartphone as you please, since the interface is available.

Everything is intuitive: basic on/off, the ability to set the device on a timer (especially useful for forgetful people who leave the iron or heater on) or set the outlet to automatically turn off if you move a certain distance from it. You can even create a schedule to automatically turn off appliances to save energy - you will have to tinker with the settings, but the bills will become less scary, as well as network overheating.

There is no confusion when managing multiple outlets - the device immediately offers to rename the device and assign a unique icon, avoiding the typical “room1/2/3”. Scheduling is the simplest and most intuitive interface among other models.

If the first model seemed a little expensive, pay attention to the next one with simpler functionality and a reasonable price.

Review from a real buyer To be honest, I didn’t know that such sockets existed until I saw them in an online store. I bought one for myself to test, it turned out to be a useful thing! Now I'm thinking of getting a couple of these.

Price: ₽ 1580

Smart plug – NooLite SRF-1-3000

Saving electricity is an integral habit of every modern person, because using excess electricity is harmful not only to our wallet, but also to the environment. The smart socket presented to your attention is designed for use with such important household electrical appliances as an illumination system.

Thus, the device interacts with such types of lamps as: incandescent, halogen lamps, LED systems, and the device also supports the operation of heating systems, electric motors and contactors.

The smart socket is truly universal, because it is suitable for any output with a voltage of 220 V. The gadget is controlled using a radio remote control and waves, which, accordingly, are received by the nooLite system located in the socket block. Thanks to this, you can control the light from neighboring rooms and even outside your home. In addition, the socket “can” remember scenarios for using illumination and repeat them over and over again.

Price: ₽ 1829

Smart socket with LCD screen

The microclimate of a home is extremely important both for a person’s comfort and for his health, because sudden changes in temperature quite strongly affect the functioning of various body systems. A high-quality smart socket will help you create an individual microclimate and maintain it without much energy consumption.

The presented device is compatible with any climate control devices, such as air conditioning systems, air heaters, heaters, etc. The maximum voltage at which operation is possible is 230 V.

So, a smart socket connects to a classic socket in an apartment or office, creating its own output for climate control devices. Thanks to the small LCD screen and button system, you can quickly and easily set the desired temperature, after which the system will maintain it itself. The thermostat also has a safety and automatic shutdown system to prevent fires.

Price: ₽ from 2500

The safest smart plug - Redmond

Opening fire statistics, you can see that one of the most common causes of fire is overheating of electric heating and other devices, after which a short circuit occurs. Due to our dynamic lifestyle, sometimes we often forget to turn off the heater, iron, electric kettle or lamp, and this can cost us property.

To prevent this problem, you should consider purchasing the REDMOND RSP-R1S, a universal security system for remote power control.

The presented gadget connects to a standard outlet and provides you with as many as four outlets for devices, namely a classic outlet, a Euro outlet, a British type and, which is very convenient in the era of smartphones, a USB interface for charging. The device also contains a sensor that connects to a Wi-Fi wireless network. It is thanks to it that you can control your nutrition via the Internet from your smartphone from anywhere in the world: work, vacation, walks, etc.

Review from a real buyer It’s very cool that it is controlled via WiFi. It was quite a shock for me! I have never seen such devices before. Now I’m slowly getting used to civilization.

Price: ₽ 880

Smart plug with Apple HomeKit support - Elgato Eve Energy

Once upon a time, a smart home was considered an invention of science fiction writers, but today the dream of remote control of all home systems is becoming a reality. The unique Elgato Eve Energy smart socket helps with this. This compact device was designed for all Apple technology lovers.

The gadget supports the proprietary Apple HomeKit system, which allows you to wirelessly connect all your iOS devices to a power outlet via Bluetooth 4.0 and control them both using your smartphone and using the proprietary voice assistant Siri. The device also reads the usage metrics of a particular device, thanks to which you can see such valuable energy consumption and draw a number of conclusions. The body of the smart socket is made of high-quality plastic that does not burn even when heated for a long time.

Price: ₽ from 4990

The best GSM socket - ZDK GSM SC-1 White

The name of the smart socket indicates the presence of a GSM module, which is responsible for remote control of the device. In addition, in the socket panel you can see a slot for a SIM card. Thus, power management is possible via SMS commands or a mobile application.

The socket is in demand in the market due to its ease of use. To activate the remote control function, you need to insert a SIM card from any mobile network into the slot, connect the outlet to the electrical network and then connect the necessary devices. Just 3 steps, and your home is controlled from a distance. It is worth noting that the power of connected devices should not exceed 2 kW. With its small dimensions (39x25x12 mm), a battery is located inside the gadget, informing about power failures.

Most often, the socket is used as a smart home controller: controlling household appliances, doors, gates, surveillance cameras, lighting, etc.

Price: ₽ 2489

The best Wi-Fi socket - Smart home Hommyn Wi-Fi (PL-20-W)

The Smart home Hommyn Wi-Fi socket (PL-20-W) is an excellent addition to a smart home. The Wi-Fi network connection function simplifies the use of the outlet: just one press of the power button, and the adapter connects to an available Internet network. Everything is extremely simple, and the indicator at the bottom of the device will inform you that it is ready to start working. After successful connection, you can control the smart gadget using a special application installed on a smartphone with the Android/iOS operating system. The socket operates from a network with a power of 220V.

In addition to the remote control function via a smartphone, the socket has built-in equally important functions of a timer and “schedule” for automatically turning on/off devices. Using these options, you can program a smart socket to one-time/permanently activate the devices connected to it for a certain time.

The smart socket has a pleasant appearance and will fit into any interior. Elongated in length with rounded corners, it has a body made of white durable plastic and dimensions 103X63X37 mm.

Price: ₽ 2490

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:

1. 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.

2. Insert the SIM card into the switch.
3. Route the necessary wires from the device to the electrical receivers. Secure the device in a place convenient for you.
4. Wait for the SIG LED on the relay body to blink. This indicates a successful search for a cellular network.
5. Press the SET button until STA flashes. Then release it and call the SIM within 30 seconds.
6. Make the necessary settings from the selected number using SMS commands.
7. Set a master password via SMS command.
8. 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.

We control the socket via SMS

I would like to introduce you to a very simple way to remotely control power. We will be using ready-made RC sockets, so we won't need to solder anything. This is very cool, because it’s better not to touch 220 V (for beginners). PS yesterday there was a similar topic, but a Raspberry Pi was used, controlled via chat. Our option is somewhat simpler and more versatile, because it does not need the Internet and a smartphone, and instead of a Raspberry there will be a regular Arduino.

We will need

Iron

• Arduino UNO
  or equivalent. In principle, Mega is also possible.
• GSM/GPRS Shield.
  Any will do. I used a shield from the Chinese Seeedstudio, because... The easiest way to buy it is from Russia.
• 443MHz transmitter
  - on AliExpress, a receiver-transmitter pair costs almost 20 rubles. Mine is called FS1000A/XY-FST, where FS1000A is the transmitter.
• Controllable socket(s) 443MHz
  . I bought the AB440S set of three adapter sockets with a remote control from a German online store. Now, it seems, you can find something similar here - I saw it recently at Chip-and-Dip.

Software

• Library for GSM shield management. Download the code from the manufacturer's website. There was no such code for my shield, so I downloaded the universal library for SIM900 GSMSHIELD
• rc-switch library for controlling sockets.

Principle of operation

Low-power radios and remote control devices can operate in the 433MHz band without a license.
On sale you can find ready-made dimmers, switches, sockets and sockets controlled by a remote control via radio in this frequency range. For our purposes, “intermediate” adapter sockets are best suited: a radio-controlled one is inserted into a regular socket, and the device itself is inserted into it. So that such sockets can be distinguished from each other, they have an address specified by DIP or rotary switches. Due to this, you can control several sockets independently. Or vice versa - set them to the same address so that they turn on and off at the same time.

Our scheme is simple: Arduino receives an SMS with a command, then, using the radio module, sends a “turn on” or “turn off” signal to the sockets. SMS messages will be of the form A1B0C0, where A, B, C... are the names of the sockets, 0 is off, 1 is on.

Assembling the device

1. We insert the SIM card into the GSM shield, and the shield into the Arduino.
2. We connect the legs of the transmitter: GND→GND, VCC→5V, DATA→to one of the pins, for example 12.
3. I also soldered 15 cm of wire to the ANT in the corner of the transmitter board. But it seems to me that this is optional.

Checking the GSM module

If you have not worked with the GSM shield before, I recommend first uploading the test code (taken from here) and checking its operation. The code transfers all data from Serial to SoftwareSerial and back, so by connecting the shield to SoftwareSerial, we can send commands to the modem via Serial Monitor in the Arduino IDE. //Serial Relay - Arduino will patch a //serial link between the computer and the GPRS Shield //at 19200 bps 8-N-1 //Computer is connected to Hardware UART //GPRS Shield is connected to the Software UART #include SoftwareSerial GPRS(7, 8); unsigned char buffer[64]; // buffer array for data receive over serial port int count=0; // counter for buffer array void setup() { GPRS.begin(19200); // the GPRS baud rate Serial.begin(19200); // the Serial port of Arduino baud rate. } void loop() { if (GPRS.available()) // if date is comming from softwareserial port ==> data is comming from gprs shield { while(GPRS.available()) // reading data into char array { buffer [count++]=GPRS.read(); // writing data into array if(count == 64)break; } Serial.write(buffer,count); // if no data transmission ends, write buffer to hardware serial port clearBufferArray(); // call clearBufferArray function to clear the storaged data from the array count = 0; // set counter of while loop to zero } if (Serial.available()) // if data is available on hardwareserial port ==> data is comming from PC or notebook GPRS.write(Serial.read()); // write it to the GPRS shield } void clearBufferArray() // function to clear buffer array { for (int i=0; i Upload the code to Arduino, open Serial monitor. Enter the AT
- the response should be OK. If there is no response , something is wrong. Perhaps you need to change the baud rate?

Then you can check that we have registered on the network: AT+COPS?

+COPS: 0,0,"MTS-RUS" OK

I recommend lowering the speed of the UART modem. I don’t know exactly about SMS, but GPRS definitely works more reliably at low speeds - the Arduino has a small buffer and some information may be lost. Let's set the speed to 2400 baud. AT+IPR=2400 OK

If you want to play around with the modem, I recommend using a ready-made java applet for the browser. Well, you can read the manual for the commands.

Check/change socket addresses

Sockets have a two-part hardware address. The first 5 bits are the same for the entire set and coincide with the remote control address. The last 5 bits are individual. The address can be changed by unscrewing the cap. On other models, the address setting may differ - see the rc-switch website.

Code

If you are not using GSMSHIELD, but some other library, then the code will of course be different, but the principle will be the same. At certain intervals, we check if we have any unread SMS, parse them, and if a valid command has come from an authorized number, we send a radio signal with the mySwitch.switchOff or mySwitch.switchOn functions, passing them the address of the socket. Note
in my case, for the shield from Seeedstudio, I needed to go into GSM.cpp and change the specified pins to 7 and 8. /* Arduino GSM-switch example code Switch on/off radio controlled controlled outlets Author: Vladislav Ross, 2014 Contact You need to download : 1. rc-switch https://code.google.com/p/rc-switch/ 2. GSMSHIELD https://www.gsmlib.org/ For GSMSHIELD: * To change pins for Software Serial, use the two lines in GSM.cpp.
* If you are using Mega, uncomment "#define MEGA" line in HWSerial.h * You can enable debug messages on serial port by defining DEBUG_ON */ #include "SIM900.h" #include #include "sms.h" #include "call.h" #include // 433MHz transmitter pin const byte RCpin = 12; char groupAddress[6] = "11111"; char smsLetters[] = "ABC"; char* deviceAddresses[] = { "10000", //A "01000", //B "00100" //C }; char adminNumber[] = "+74991356235"; //your phone number CallGSM call; SMSGSM sms; RCSwitch mySwitch = RCSwitch(); char number[20]; byte stat=0; char smsText[11]; byte position; int deviceLetterIdx = -1; byte i,j; void setup() { gsm.begin(2400); delay(10000); for(i = 1; i <= 21; i++) { sms.DeleteSMS(i); } mySwitch.enableTransmit(RCpin); }; void loop() { //hang up all incoming calls /*stat=call.CallStatus(); if(stat==CALL_INCOM_VOICE) { call.HangUp(); }*/ position = sms.IsSMSPresent(SMS_UNREAD); //get new SMS if (position) { sms.GetSMS(position, number, smsText, 10); sms.DeleteSMS(position); if(strcmp(number, adminNumber) == 0) //accept SMS only from defined number { for (i = 0; i < sizeof(smsText) — 1; i++) { if(deviceLetterIdx != -1) { // got letter, now expecting 0 or 1 if(smsText == '0') { mySwitch.switchOff(groupAddress, deviceAddresses[deviceLetterIdx]); delay(500); } if(smsText == '1') { mySwitch.switchOn(groupAddress, deviceAddresses[deviceLetterIdx]); delay(500); } deviceLetterIdx = -1; } else { //waiting for letter A,B,C... for(j = 0; j < sizeof(smsLetters) - 1; j++) { if(smsLetters[j] == smsText ) { deviceLetterIdx = j; break; } } } } } } delay(10000); }; GitHub.

Problems?

If the sockets do not want to switch to any one, you can try to receive a signal from the original remote control to the receiver. rc-switch has sample code.

What's next?

How can we develop this project further: Firstly, we still have a bunch of pins left on the Arduino itself and on the GSM shield. You can connect some sensors or devices to them. For example, do remote temperature monitoring or watering flowers. Secondly, we only used SMS, and the module can also transmit voice and GPRS. GPRS can transfer much more data. In addition, you don’t have to hang up when calling, but, for example, accept the call and let them listen to what’s happening on the spot. It is also possible that you want to receive control SMS not from one number, but from several. In this case, I would recommend storing the numbers in your address book &mash; the library has the corresponding functions.

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.