What can’t the little $5 WiFi module do? Now that [lhartmann] has got an ESP8266 controlling the motors of a 3D printer, that’s one more item to check off the list. What’s coolest about this ...

By choosing different flash memory parts and selecting the DIO or DOUT modes, it’s actually possible to free up more GPIO pins as well. This knowledge is handy when optimizing ESP8266 designs ...