In this tutorial we will show how to connect ESP8266 WiFi module and 5V Arduino. Since ESP8266 is not 5V tolerant we need some kind of voltage level shifter.
In this tutorial we will show how to create ESP8266 WiFi relay switch with ESP8266 module and Arduino. You can use relay switch to remotly control more than one device (as many as you have free Arduino digital ports). You can also combine relay switch with other sensors. We will use ESP8266 EasyIoT library.
New version of EasyIoT server is released. New features are: