by Rui Santos @ randomnerdtutorials.com:
In this project you’re going to post a Tweet with an ESP8266. The goal of this project is to show the endless possibilities that this $4 WiFi module offers when integrates with a free platform that I’m about to show you.
In order to accomplish this task you have to sign up for one free service called IFTTT which stands for “If This Then That”.
Posting a Tweet with the ESP8266 – [Link]