In this tutorial we will make two ESP8266 as wireless serial (chat application) using UDP communication protocol. You can have communication between multiple ESPs at the same time. We are using UDP broadcast. UDP is unreliable, but works for many application. UDP gives advantage of sending one message to all ESP8266 devices on same network at the same time using broadcast.

In this post I will explain two types of ESP to ESP communication methods. Continue reading ESP to ESP Communication →