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ESP8266 ESP-01 WIFI Wireless with 2CH Relay Module Board

ESP8266 ESP-01 WIFI Wireless with 2CH Relay Module Board

The Dual WiFi Relay Module is an advanced control solution built on the ESP-01 WiFi module and powered by the STM8S103 high-performance microprocessor. It enables seamless wireless control of a dual-channel relay via a mobile application, requiring only minimal setup within a local area network (LAN). Ideal for home automation, industrial control, and other IoT applications.

Package Contents

  • 1 x Dual-channel WiFi Relay Module

Wifi Relay
49.00 AED 49.00 AED (Tax included)

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Features

  • Integrated Components:
    • Equipped with ESP-01 WiFi module for reliable wireless communication.
    • Powered by STM8S103 microcontroller for stable and efficient operation.
  • Dual Operating Modes:
    • Mode 1: Direct phone-to-module connection (AP mode).
    • Mode 2: Router-based connection (STA mode) for extended range.
    • Can also act as a USB relay when ESP-01 is removed.
  • Impressive Transmission Distance:
    • Mode 1: Up to 100 meters in open space.
    • Mode 2: Range depends on router signal strength.
  • Smart Configuration: SmartConfig technology for easy setup and credential saving.
  • Durable Relay Design: 5V 10A 250V AC (or 10A 30V DC) with diode protection and 100k+ cycles.
  • User-Friendly Board: Status indicators, jumpers, UART & SWIM interfaces for development.

Specifications

  • Model: ESP8266 (ESP-01)
  • Channels: 2 (Dual-channel)
  • Board Size: 59 x 40 mm
  • Weight: Approx. 36g
  • Power Supply: 5V input

Pinout

ESP8266 WiFi 2 Channel Relay Module Diagram

Pin/Port Description
IN+, IN- 5V power input
5V, GND, SWIM, NRST STM8S program download port
TX, RX UART serial communication
Button S1 Switch between Mode 1 & Mode 2
Button S2 Restore factory settings
LED D7 (Red) Mode 1 indicator
LED D5 (Blue) Mode 2 indicator
LED D6 (Green) Working condition (off / 0.5s / 2s flash / solid)
LED D28 & D4 (Red) Relay ON indicator lights
2 Jumper Caps RX ↔ RX1 and TX ↔ TX1 (normal use), debugging (top position)
COM1, COM2 Common relay terminals
NO1, NO2 Normally open terminals
NC1, NC2 Normally closed terminals

Relay Control Instructions (HEX)

  • Turn ON Relay 1: A0 01 01 A2
  • Turn OFF Relay 1: A0 01 00 A1
  • Turn ON Relay 2: A0 02 01 A3
  • Turn OFF Relay 2: A0 02 00 A2

Setup Requirements

  • 5V/1A Power Adapter
  • ESP Touch-Demo App (WiFi configuration)
  • EasyTCP-20 App (relay control)

Setup Steps

  1. Connect Power: IN+ to +5V, IN- to GND.
  2. WiFi Setup (Mode 2): Use "ESP Touch-Demo" to enter WiFi SSID and password.
  3. Relay Control: Use "EasyTCP-20" to send HEX commands.

Operating Modes

Mode 1: Direct AP Connection

  1. Insert ESP-01 and power the module. Green LED blinks every 2 seconds after ~4 seconds.
  2. Connect phone to ESP-01 hotspot.
  3. Open "EasyTCP-20", click "CONNECT", then send HEX commands to toggle relays.

Mode 2: Router-Based Communication

  1. Insert ESP-01, power the module, and press S1. Blue LED lights up and starts 0.5s blinking.
  2. Connect phone to router and run "ESP Touch-Demo". Enter WiFi password and confirm.
  3. App shows IP address (e.g., 192.168.0.189) when configured.
  4. Open "EasyTCP-20", enter IP, click "CONNECT", then send HEX commands.

Additional Notes

  • First-time WiFi setup takes ~1 minute; reconnection ~20 seconds.
  • Press S2 or power cycle to reset WiFi settings.
  • If the router signal is weak, the green LED goes off and reconnects automatically.
  • TCP disconnects after 6 minutes of inactivity. Reconnect via "CONNECT" button.
  • Only when the green LED blinks every 2s or is steady can the buttons be used.