






GSM module controller for gate irrigation furnace SM1-WLTE-EA 4G


The GSM controller SM1-WLTE-EA 4G by Spreest is a modern device for remote control of gates, heating systems, and other installations.
It provides convenient management from a phone or web browser, using 4G LTE connectivity and SMS notifications about events.
Thanks to 4G network support, the device can operate practically anywhere – even where there is no Wi-Fi access. It can be controlled by a dedicated application, but its installation is not necessary.
The device, with its temperature and humidity monitoring function, is used in many areas, such as farms, homes and apartments, industry, base stations, and solar installations, offering a reliable and flexible solution for remote control and automation.
NOTE! To use the temperature and humidity monitoring functions, it is necessary to purchase a sensor available in our assortment.
Key Features
1. Mobile application – Control the device's operation from anywhere in the world.
2. Automations – Thanks to various modes in the application, you can easily control devices – e.g., turn on the furnace when the temperature drops below expected or set machines in the factory to start, e.g., precisely at 8:00 AM.
3. Four activation methods – The controller can be activated in four ways: via SMS command, phone call, application, or a button on the device.
4. Real-time notifications – Receive alerts about changes in temperature and humidity in the controlled area.
5. SMS notifications – Option to enable feedback on relay action execution.
6. Number list – Ability to save up to 99 authorized numbers to control the device.
7. Compatibility with temperature and humidity sensors – Purchasing a temperature sensor or a temperature and humidity sensor enables automatic response to ambient conditions.
8. Temperature and humidity control – Allows setting multiple temperature levels (up to 8) and humidity levels (up to 4), which trigger appropriate device actions.
9. Operation on 4G/2G/GSM network – Ensures stable communication over a wide range of frequencies and independence from local infrastructure.
Convenience in everyday use
This intelligent controller is a solution that simplifies everyday life – both at home and in business. You can program its operation exactly as you need it: from scheduled garage door opening at specific times to automatic watering of plants in a greenhouse at selected times of day.
Forget about manually performing repetitive tasks. The controller will do it for you – reliably and always on time.
Opt for convenience, time savings, and full control over your environment – everything works automatically, exactly as you plan.
Example Wiring Diagram
- NO – Normally Open contact.
- COM – Communication contact, switching signal/voltage between NO and NC contacts.
- NC – Normally Closed contact.
- SIGNAL1, SIGNAL2 – Signal contacts in an external device.
A gate controller is just an example. In practice, it can be any device equipped with standard signal contacts (NC, COM, NO). Many devices – e.g., furnaces – operate by starting when two contacts are shorted and continuing to operate as long as the connection is maintained – i.e., until it is disconnected, e.g., via SMS, application, or other control.
Technical Specification
- Material: Aluminium
- Application: Relay switch
- Power Consumption: Standby 12 V 50 mA, maximum operation 12 V 200mA
- 4G Frequency (LTE FDD): B1 B3 B5 B7 B8 B20
- GSM Frequency: 900 1800 MHz
- SIM Card Interface: Standard SIM card
- Antenna Interface: Standard SMA interface
- Temperature and Humidity Interface: 1 sensor port
- Temperature Detection Range (after purchasing a temperature sensor): -40 to 125 ° C
- Humidity Detection Range (after purchasing a temperature and humidity sensor): 0~100%
- Output Logic: Normally open and normally closed
- Dimensions: 112 x 27 x 66 mm
- Weight: 255 g
Set includes
- 1x GSM Gate Opener Controller SM1-WLTE-EA 4G
- 1x Antenna with cable
- 1x Cable with power supply (1m)
- 1x User manual







