The ESP8266 is the answer to “I want something with Wifi.” Surprisingly, there are a number of engineers and hobbyists who have not heard of this chip or have heard of it but don’t really ...

Just to be sure, he shorted the transmit and receive lines to see that he did get an echo back from a terminal program. Unsurprisingly, you can also repurpose an ESP8266 to perform this same task.