ESP8266 Pinout Guide: How should I use the GPIO pins?
Set ESP8266 to default - YouTube
TMT] - Using The Reset Button Of An ESP8266 As An Input - YouTube
Reset and Programming Circuit of ESP8266 | Circuits4you.com
Learning Electronics: Tips and Tricks for using ESP8266 in my circuit designs « RAYSHOBBY.NET
ESP8266 Pinout | ESP8266 Tutorial
I am getting “espcomm_sync failed” error when trying to upload my ESP. How to resolve this issue? — ESP8266 Arduino Core 3.1.2-21-ga348833 documentation
How to enable GPIO06 to GPIO11 on ESP8266? - Programming Questions - Arduino Forum
ESP8266 Pinout Reference: Which GPIO pins should you use? | Random Nerd Tutorials
ESP8266 Pinout Reference: How To Use ESP8266 GPIO Pins