“Connect your Arduino to the internet by adding ESP8266 WiFi Module!
The ESP8266 Wifi module is a complete WiFi network where you can easily connect as a serving Wi- Fi adapter, wireless internet access interface to any microcontroller based design on its simple connectivity through Serial Communication or UART interface.
Adding this module to your Arduino UNO will open you to more and exciting projects.
What is the process?
There are a lot of ways to use ESP866 for communication. Some may use it to send / receive data online or regularly upload data. For this tutorial I will just show you how can we communicate to Arduino wirelessly using your phone (Android or iPhone) . This will be done offline so no need to have internet connection.
Our ESP8266 will serve as Access Point (AP Mode), meaning it will provide access to Wi-Fi network to other devices (stations) and connects them further to a wired network
The process it pretty simple. Use your phone to send any command to Arduino. With the help of ESP8266, everything will work wirelessly.”