The ESP8266 is well known as an incredibly small ... To get up and running you really only need to create three distinct voltage levels and have timing control to about 1us.

showing how the baud rate used to view the serial output from the ESP8266 needs to be adjusted to match the chip’s frequency or else you’ll only get garbage on the line. But what happens to ...

an ESP8266 is even cheaper. And when I say cheaper, I'm talking about picking up one of these microcontrollers for $5 or even less. It's an incredibly cost-efficient device, with the only downside ...