Quote Originally Posted by towlerg View Post
How did you flash your code onto the esp8266?
It varies with modules and programming languages. For the ESP8266 ESP-01 used in the above project there is a handy flasher that supports the NodeMCU auto-reset method supported by ARduino, ZBasic and others.
ESP8266 Flasher v2

The WeMos D1 mini I referenced above, as well as some other ESP8266 versions, also support this method which simplifies flashing from the IDE being used.