ESP8266 ESP-01S 5V WiFi Smart Relay Switch Module

The ESP8266 ESP-01S 5V WiFi Smart Relay Switch Module is a compact and powerful IoT control board that allows you to turn electrical devices on or off wirelessly through a WiFi connection. Built around the ESP8266 ESP-01S WiFi module, this relay board is designed for smart home automation, remote control systems, and DIY IoT projects.

This module is also known as: ESP-01S Relay Module, ESP8266 WiFi Relay Board, 5V Smart Relay Switch, IoT Relay Module, ESP8266 Smart Switch.

With this smart relay, you can easily build a wireless switch to control lights, appliances, or other electronic devices from your phone or over the internet. The module operates from a 5V DC supply and uses the GPIO0 pin of the ESP-01S to control the relay through a high-level trigger. It is commonly used in home automation, remote switching, automation projects, and internet-connected control systems. Many users search for the ESP8266 relay module price in Bangladesh, making it a popular and practical choice for IoT beginners and advanced makers alike.

The board can be programmed using the Arduino IDE or Lua firmware, and it is often shipped with a demo firmware, allowing basic control once powered.
**Note: ESP-01S Module is not included

• Main Chip: ESP8266 (ESP-01S module) (not included)
• Operating Voltage: 5V DC
• Wireless Standard: WiFi 2.4GHz (802.11 b/g/n)
• Relay Type: 1-channel relay
• Control Pin: GPIO0 (high-level trigger)
• Programming Support: Arduino IDE, Lua firmware
• Application: Smart home control, remote switching, IoT automation, DIY projects