Self-Locking Interlock Remote Control 1 Way Relay Module with 2.4G WiFi for Smart Home Systems

This 1-channel relay module gives you remote switching capability over a single circuit using a 2.4G WiFi connection. Its self-locking interlock mode holds the relay in its last commanded position, making it suitable for applications where steady on or off state is required. The module accepts a wide DC input voltage range from 7V to 32V, and communicates via a USB interface, simplifying integration into existing setups. With onboard PCB antenna and support for the Ewelink platform, it offers a practical wireless control solution for home automation or small-scale industrial use.

Features and Construction

The module is built around a single-channel relay design with a PCB onboard antenna for 2.4G signal transmission. Its self-locking interlock logic ensures the relay stays put after receiving a command, avoiding unintended toggling.

Relay Mode and Operation

The self-locking interlock mode keeps the relay in its last state—either on or off—until a new command is sent. This is useful for controlling lights, pumps, or other devices that should remain in a fixed condition without constant signal refresh.

2.4G WiFi Connectivity

The module uses the 2.4G WiFi frequency band to communicate with your network. It works with the Ewelink app for remote control via smartphone, voice assistants, or automation routines, as long as your WiFi network operates on 2.4G.

USB Interface and Voltage Range

A USB port handles both power and data connection, accepting DC input between 7V and 32V. This wide voltage tolerance allows the module to work with many common power supplies, from small battery systems to regulated adapters.

Uses and Placement

This relay module fits into scenarios where remote switching of one circuit is needed. Its small size and lightweight build make it easy to mount in enclosures or near devices.

Home Automation

Use the module to control a single light, fan, or appliance remotely via the Ewelink app. The self-locking mode ensures the device stays on or off as set, even if WiFi drops briefly, providing consistent control.

Industrial or DIY Projects

In workshops or small automation projects, the relay can switch a pump, valve, or motor within the 7-32V power range. The USB interface simplifies wiring and integration with microcontrollers or existing control systems.

Benefits and Buying Value

The module offers straightforward wireless control without needing complex wiring. Its self-locking design reduces the need for constant commands, and the compact size saves space.

Easy Integration

With a USB interface and Ewelink app compatibility, setting up the relay is simple—just connect power, pair over 2.4G WiFi, and start commanding. No additional hubs are required beyond your existing WiFi router.

Reliable State Retention

The interlock lock feature means the relay remembers its last state, which is valuable for devices that must stay on or off without interruption. This reduces maintenance and ensures predictable operation in automated routines.