SMG-WF01 Self-Locking WiFi Relay Module for 7-32V Remote Control Applications

This 1 Way relay module, part of the SMG-WF01-7-32V series, is engineered for adding wireless control capability to a single electrical circuit. Its primary function is to act as a remotely operated switch, triggered through a 2.4G WiFi network. The design incorporates a self-locking interlock mechanism, which helps maintain the relay's last commanded state (on or off) without requiring constant signal input, providing stability in operation. With a broad operating voltage range from 7V to 32V DC, it is adaptable to a variety of low-voltage power systems, from automotive and marine applications to home automation projects. The inclusion of a USB communication port facilitates direct connection to a computer or other host device for configuration and control software interaction, making setup a straightforward process.

Features and Construction

The module's feature set is centred on providing reliable, wireless switching with practical integration in mind.

Material and Build

The module is constructed using standard electronic components assembled on a Printed Circuit Board (PCB). This PCB houses the relay, the WiFi transceiver circuitry operating on the 2.4G frequency band, and the voltage regulation components needed for the 7-32V input range. The antenna for wireless communication is integrated directly onto the PCB as a PCB onboard antenna, eliminating the need for an external aerial and contributing to a more compact overall form factor.

Size and Practical Fit

With dimensions of 15cm in length, 8cm in width, and a slim 2cm profile, the module is designed for space-conscious installations. Its total unit weight is a light 0.1kg, meaning it adds minimal load and can be mounted in enclosures or directly onto surfaces with ease. This compact size, combined with the wide voltage compatibility, makes it suitable for retrofitting into existing control panels or incorporating into new builds where panel space is limited.

Uses and Placement

The module's wireless capability and single-channel design suit it for a range of control scenarios where running physical control wires is impractical or undesirable.

Event or Professional Use

In professional or event settings, this module can be used to remotely trigger lighting effects, sound systems, or other electrical equipment via a smartphone or computer on the same WiFi network. Its self-locking feature is particularly useful here, ensuring that a light or device stays in its last instructed state even if the control signal is momentarily lost. The 7-32V range allows it to be powered from common battery packs or regulated DC power supplies used in portable setups.

Everyday Home Use

For home automation, the module can integrate non-smart appliances like lamps, fans, or pumps into a WiFi-controlled network. By connecting it to platforms like Ewelink (as suggested by the item number), users can create schedules, timers, or voice-controlled commands through smart assistants. The USB interface simplifies the initial pairing and network configuration process directly from a laptop or desktop computer.

Benefits and Buying Value

The value of this relay module lies in its specific combination of features that address common needs in remote switching projects.

Reuse and Low Maintenance

The solid-state design and lack of moving parts beyond the relay itself contribute to a product with a focus on reliable, long-term operation with minimal maintenance. The self-locking interlock reduces unnecessary switching cycles, which can prolong the relay's operational life. Its compatibility with a wide input voltage means it can be repurposed for different projects in the future without requiring a different power regulator module.

Why Choose This Product

This module is a practical choice for anyone needing to add wireless, single-channel control to a DC circuit. Its key differentiators are the specific 7-32V operating range, which is wider than many basic 5V or 12V-only modules, and the integrated 2.4G WiFi connectivity that works with standard home and office networks. The stated dimensions and weight provide clear expectations for installation planning, and the inclusion of the USB interface offers a direct configuration path, avoiding the complexity of some wireless-only modules.