2.4 GHz ESP8285 5V Relay 2 Channel 220V AC Control Board Remote Switch Receiver WiFi Intelligent
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2.4 GHz ESP8285 5V Relay 2 Channel 220V AC Control Board Remote Switch Receiver WiFi Intelligent

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  • Product SKU: KG742
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Specification

Description

2.4 GHz ESP8285 5V Relay 2 Channel 220V AC Control Board Remote Switch Receiver WiFi Intelligent

This WiFi Smart Switch Relay Module is a remote-controlled switch that allows users to turn electrical appliances ON/OFF using a mobile app. It is powered by an ESP8266 WiFi module, making it ideal for home automation, IoT projects, and smart control systems. The built-in dual relays enable switching of high-voltage AC appliances up to 10A at 250V AC.

This module is widely used in home automation, remote power control, and industrial applications, providing a cost-effective, energy-efficient, and reliable smart switching solution.

The PSF-B04 is a 4-channel Wi-Fi control module designed for IoT applications, enabling wireless control of devices through Wi-Fi connectivity. It integrates an ESP8285 chip, which combines the capabilities of the ESP8266 with built-in flash memory, facilitating seamless wireless communication.

Technical Details

  • WiFi Module: ESP8266 (Integrated with antenna for extended range)
  • Relay Type: SRD-05VDC-SL-C
  • Relay Voltage: 5V DC
  • Relay Output: 10A @ 250V AC / 10A @ 30V DC
  • Control Mode: WiFi App + Physical Buttons
  • Input Voltage: 110V-220V AC (Integrated AC to DC power module)
  • Output Terminals: NO (Normally Open), COM (Common), NC (Normally Closed)
  • Antenna Type: Coil-type onboard antenna for extended WiFi range
  • Buttons: S1, S2 (Manual Control), Mode Button (Configuration)
  • Microcontroller: ESP8285
  • Operating Voltage: Typically 5V DC
  • Output Channels: 2
  • Communication Protocol: Wi-Fi (2.4 GHz)
  • Antenna: Integrated onboard antenna for extended range

Working Principle of the WiFi Relay Module (ESP8266-Based)

  • Powering the Module: Operates on a 110V-220V AC power supply. It contains an AC to DC converter that steps down the voltage to 5V DC to power both the ESP8266 WiFi module and the relay circuit.
  • WiFi Communication: The ESP8266 module connects to a WiFi network and communicates via IoT platforms like Blynk, Tuya, or custom applications. Users can send ON/OFF commands from their mobile phones or other networked devices. The module can also be configured to work with smart home assistants.
  • Relay Switching Mechanism: The module includes two relays that can control electrical appliances. Each relay has:
    • NO (Normally Open) Terminal → Connects when the relay is activated.
    • NC (Normally Closed) Terminal → Disconnects when the relay is activated.
  • Manual Control Buttons:
    • S1 & S2 Buttons: Allow manual control of the relays without using WiFi.
    • Mode Button: Used for WiFi configuration or to reset the module to factory settings.

Wiring & Connections

  • L, N (AC Input): Connect 110V-220V AC power supply
  • NO (Normally Open): Connects to appliance load when relay is activated
  • NC (Normally Closed): Connects to appliance load when relay is deactivated
  • COM (Common): Common connection for relay output
  • 5V & GND (ESP8266): Provides power to ESP8266 WiFi Module

Mobile App Control Setup (Using Blynk or Tuya Smart App)

  • Download & Install App:
    • Blynk App (for DIY IoT control) or
    • Tuya Smart App (for pre-configured IoT solutions)
  • Create a New Project:
    • Select ESP8266 as the microcontroller.
    • Choose WiFi as the connection type.
    • Copy the Auth Token (sent to your email).
  • Connect WiFi Module to Network:
    • Power the module and press the Mode button to enter configuration mode.
    • Connect to the WiFi hotspot created by the module.
    • Open the Blynk/Tuya app and configure WiFi credentials.
  • Control Devices from Mobile:
    • Add switch widgets to control the relays.
    • Assign V1 & V2 to the relay pins.
    • Tap ON/OFF to control appliances remotely.

Features

  • Wireless Control – Turn appliances ON/OFF from anywhere using WiFi.
  • Dual Relays – Control two different devices at the same time.
  • Voice Assistant Support – Compatible with Alexa & Google Assistant (via Tuya).
  • Timer Function – Set schedules to automate switching.
  • Manual Override – Built-in buttons for local control without an app.
  • Energy Efficient – Low power consumption.
  • Strong WiFi Signal – Enhanced antenna for stable connections.

Applications

  • Smart Home Automation – Control lights, fans, air conditioners, and home appliances.
  • Smart Irrigation Systems – Control water pumps remotely.
  • Industrial Automation – Switch motors, alarms, and control panels.
  • Security Systems – Automate door locks, sirens, and CCTV power.

Physical Attributes

  • Size (in the control panel) : 70 x 50 x 23 mm (length x width x height).

Package Includes

  • 1 x 2.4 GHz ESP8285 5V Relay 2 Channel 220V AC Control Board Remote Switch Receiver WiFi Intelligent

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