Picture of Cheap Arduino WiFi shield with
What you need An Arduino board (any compatible board is OK). (to use with the provided file you can use but you have to convert the source code respectively). WiFi router module. Power supply or Power supply and regulation circuit.
Arduino WiFi Shields
The 'brain' is the ESP8266 uC . It is available with on board WiFi and plenty of I/O for smaller projects. All this for well under $10US...
Arduino WiFi Garage Door Opener #security #network
Arduino WiFi Control with ESP8266 Module.This Project is a basic Internet of Things.(IoT)
Cheap and Easy WiFi (IoT) Tutorial Part 1 - Setup/Intro - YouTube
Arduino WiFi motion detector (PIR) that writes to SQL via cheap ESP8266 module