1-Channel Wi-Fi Relay Module Base Board – 5V DC (Without ESP-01)

Take absolute control over your custom smart home ecosystem with the 1-Channel Wi-Fi Relay Module Base Board. Precision-engineered by Muonix, this hardware platform is designed for developers, system integrators, and makers who already own an ESP-01 / ESP-01S (ESP8266) transceiver and need a rugged, standalone board to interface safely with high-voltage mains equipment.

By removing the wireless chip from the package, this product provides an ultra-economical way to expand your existing component stock. Engineered under strict lead-free manufacturing guidelines, this board features optocoupled signal traces, flexible trigger selectors, and an onboard low-dropout voltage regulator to ensure clean execution under demanding, continuous industrial workloads.

Key Features

• Dedicated ESP-01 Socket: Features a pre-mounted $2\times4$ female header on the board. Simply plug in your own ESP-01 or ESP-01S wireless transceiver to immediately bridge your high-voltage load to a 2.4 GHz Wi-Fi network.

• Complete Optocoupler Isolation: Built with an onboard high-speed optocoupler that creates a physical light barrier between the wireless logic socket and the high-voltage lines, completely isolating your ESP8266 microchip from inductive spikes and back-EMF surges.

• Flexible Trigger Logic: Equipped with an adjustable jumper pin setup that allows you to configure the system to trigger on a High-Level Trigger or a Low-Level Trigger signal to match your specific code configuration.

• Advanced Voltage Step-Down: Features a highly efficient onboard low-dropout (LDO) regulator that steps down the incoming 5V DC supply into a clean, noise-free 3.3V power rail required to run the ESP-01 processor safely.

• Status Indicators: Includes two bright diagnostic LEDs—one serving as a dedicated Power Indicator and the other providing instant visual verification whenever the relay channel is actively closed.

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 Wiring & Pin Layout

The module features a highly organized layout to keep low-voltage signals clearly separated from high-voltage wiring:

1. Logic Control Input (Header Pins):

• VCC: Connects to your +5V DC power source.

• GND: System ground reference pin.

• IN1: Trigger control line. Pulling this line HIGH or LOW (depending on your jumper setup) toggles the relay.

2. High-Voltage Load Output (3-Way Screw Terminal):

• 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 open.

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

Common Applications

• Existing Stock Expansion: The most cost-efficient choice if you already have spare pre-programmed ESP-01 chips on hand and need to expand your hardware automation setup.

• Smart Home Infrastructure: Fits inside standard junction boxes to build custom smart switches, connected lamps, and remote appliance reset buttons.

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

Package Includes:

• 1 x 1-Channel 5V Relay Module Base Board (ESP-01 Module NOT included)