Hello friends! In this tutorial, we will learn how to get data from a web server using an Arduino UNO and the original Arduino WiFi Shield. We will use that data to switch two LEDs, so you can see how a command stored on a server becomes an action on a microcontroller. There are two parts to this project: a web page that changes a command file, and an Arduino client that reads the file periodically. We will discuss both parts in the same order as the original project, with clearer wiring, a defined response format and checks that prevent an incomplete response from becoming an LED command. This is a legacy-shield tutorial. The WiFi library and pin assignments described here belong to the original shield, not every board with WiFi in its name. We will first run the demonstration on a truste ...