1-Channel Wi-Fi Relay Module – 5V DC (With ESP-01 ESP8266)

Bring wireless internet control to your appliances with the 1-Channel Wi-Fi Relay Module. Precision-engineered by Muonix, this smart IoT module combines a heavy-duty 5V switching circuit with the legendary ESP-01 (ESP8266) Wi-Fi transceiver.

This compact module allows your smartphone, computer, or cloud server to wirelessly switch lights, fans, locks, and small appliances from anywhere in the world. Built under strict lead-free manufacturing practices, it provides an all-in-one plug-and-play solution for smart home automation, remote industrial tracking, and custom wireless IoT deployment.

Key Features

• Smart Wi-Fi Interfacing: Driven by an onboard, removable ESP-01 module (ESP8266), giving you native 2.4 GHz Wi-Fi connectivity to run standalone web servers or link directly to cloud MQTT brokers.

• Plug-and-Play ESP-01 Slot: Features a dedicated $2\times4$ female header on the board. Simply plug the pre-programmed ESP-01 module into the socket, and your wireless relay configuration is ready to deploy.

• Long Transmission Range: Capable of establishing a stable open-environment wireless communication range up to 100 meters using the ESP-01's integrated PCB trace antenna.

• Optocoupler Signal Isolation: Built with high-speed optocouplers that create a safe, physical light barrier between the wireless ESP8266 logic and high-voltage rails, protecting your silicon from inductive voltage surges.

• Dual-Mode Wireless Flexibilities: Supports multiple wireless protocol profiles out of the box: AP Mode (acts as its own Wi-Fi hotspot) or STA Mode (connects to your home or office router network).

Technical Specifications

Lead-Free & Soldering Safety

• 100% Lead-Free PCB: The base circuit board is constructed from eco-friendly, lead-free materials, aligning fully with global industrial safety and environmental practices.

• Factory Pre-Soldered Components: All heavy-duty terminal blocks, optocoupler footprints, and power traces are mounted using high-grade, lead-free solder wire to ensure optimal electrical conductivity.

• Enhanced Thermal Strength: The premium lead-free solder joints offer superior resistance against crystallization and structural drying, even when cycling heavy 10A electrical loads over extended periods.

Hardware Port Mapping & Interface Controls

The module layout is built for rapid wiring and instant system diagnostic checks:

• Hardware Controls: Includes a manual onboard Reset Button to safely reboot the microchip without physically stripping out the incoming power lines.

• Onboard Indicators: Features two bright diagnostic LEDs—one serving as a dedicated Power Indicator and the other displaying the active real-time closing state of the relay channel.

• 3-Way Load Terminal Block: * NO (Normally Open): The circuit stays disconnected/open until a wireless Wi-Fi command triggers the relay to close.

  • NC (Normally Closed): The circuit stays connected/closed by default until wireless logic triggers it to drop.

  • COM (Common Terminal): The central main power wire from your load connects directly here.

Common Applications

• DIY Smart Switches: Build custom, discrete wall switches to control appliances via phone apps or smart home ecosystems like Home Assistant and Blynk.

• Wireless Access Controllers: Wire the output contacts directly to solenoid door locks or motorized gates to toggle security access over Wi-Fi.

• Industrial Wireless Telemetry: Act as an internet-connected automated sub-relay node to cycle factory equipment or reset remote servers.

Package Includes:

• 1 x 1-Channel 5V Relay Module Base Board

• 1 x ESP-01 (ESP8266) Wi-Fi Transceiver Module