Single Channel Relay Module

About Relay Module

If you don't know how to install ESP8266 into Arduino IDE, please refer this link
How to install ESP8266 in Arduino

If you don't know how to program ESP01S, please refer this link
How to program ESP01S

Now we can upload the sample code to ESP01S

You can get sample code from our Github repository

This is a simple code using which you can control the relay via WiFi
Once the code is uploaded, connect the esp01 to the relay module and power on relay module
You will notice a new WiFi network ES-1CH-Relay, connect to that network using password trytest123
Then use your browser [Google Chrome] and go to 192.168.4.1 [there is a chance the IPAddress is different]
You will see the page as below. You can control the relay through this page

If you don't know how to install MQTT library on Arduino, please refer this link
How to Install MQTT library on Arduino

If you are interested to setup your own MQTT Broker, please refer this link
How to setup free MQTT Broker

You can get sample code from our Github repository

Using this code you can control relay module from any where through internet
This can only be used for non commercial propose. We are using free MQTT server from Beebotte
Once the code is uploaded, you can use our test client page MQTT Smart Switch to switch relay
If you have changed the Topic Name in the code, then use that name here
You can also control the relay and change settings by connecting to Hotspot [192.168.4.1] *