ESP8266 – 5$ internet connected switch

In this tutorial we will show how to build WiFi internet connected switch connected to EasyIoT Cloud. We will use ESP8266, solid state relay and Arduino IDE. Switch can be controlled by WEB application, native Android application or button.

ESP8266 – 5$ internet connected switch

Improved version of this switch can be found here:

This internet switch is “plug and play” – it will automatically set all EasyIoT Cloud settings, so no configuration in EasyIoT Cloud is needed.

Material for switch cost about 5$.

WARNING!! You will play with LIVE MAINS!! Deadly zone!!
If you don’t have any experience and are not qualified for working with MAINS power I will not ecourage you to play arround! Do NOT use it without proper Knowledge about MAINS circuits ! Do NOT use it without a proper FUSE on MAINS line! Max current for solid state in this tutorial is 2A – suitable for room light only.

Step 1: Material


  • ESP8266 WiFi module
  • Solid State Relay 2A 240V
  • 3.3V 600mA AC-DC step down module
  • Push Button switch
  • NPN Transistor TO-92 2N2222
  • 1000uF electrolytic capacitor
  • resistor, 1K, 47K

Click to buying guide for ESP8266 internet connected swith.

Step 2: EasyIoT Cloud Registration

Register to EasyIoT Cloud. You will need username and password later in program. Also use username and password to access EasyIoT Cloud and control your device from computer or mobile phone. Also EasyIoT Cloud Android application is available.

Step 3: Program

Program is written in Arduino ESP8266 IDE. See Arduino ESP8266 IDE tutorial how to connect ESP8266 module to computer to upload program. Program can be downloaded from GitHub. You will also need MQTT client library. Add this library to library folder in Arduino IDE. Program uses EasyIoT Cloud MQTT API.

In program change following lines to set access point username and password and your EasyIoT Cloud username and password:

#define AP_SSID “xxx”
#define AP_PASSWORD “xxx”



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About The Author

Ibrar Ayyub

I am an experienced technical writer holding a Master's degree in computer science from BZU Multan, Pakistan University. With a background spanning various industries, particularly in home automation and engineering, I have honed my skills in crafting clear and concise content. Proficient in leveraging infographics and diagrams, I strive to simplify complex concepts for readers. My strength lies in thorough research and presenting information in a structured and logical format.

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