Switches Tutorial for Arduino, ESP8266 and ESP32
ESP8266 Node MCU board specifications and pins descriptions. Frequently asked questions related to WI-FI board esp8266 node MCU
Adafruit Feather Huzzah ESP8266 pull-up resistor using Arduino IDE - Stack Overflow
ESP8266 Pinout Reference: Which GPIO pins should you use? | Random Nerd Tutorials
Using ESP8266 GPIO0/GPIO2/GPIO15 pins
Switches Tutorial for Arduino, ESP8266 and ESP32
esp8266 - ESP-01 module CH_EN pin confusion - Electrical Engineering Stack Exchange
How to Show Arduino Sensor Data on a Web Page - Circuit Basics
ESP8266 Pinout Reference: Which GPIO pins should you use? | Random Nerd Tutorials
Pull-up and pull-down resistors on Arduino - ElectroSoftCloud
Switches Tutorial for Arduino, ESP8266 and ESP32
esp8266 - How to keep a pin LOW for a small amount of time after pushing a button and while device is booting? - Arduino Stack Exchange
Arduino Internal Pull-Up Resistor Tutorial - Bald Engineer
Using the 4 Pins of the ESP8266-01 : 3 Steps - Instructables
ESP32 and ESP8266 GPIO Programming with MicroPython - LED Blinking
Hardware design — ESP-FAQ documentation
Ask Hackaday: Is The ESP8266 5V Tolerant? | Hackaday
ESP-01 and ESP-01S How program and use the Pins and Leds
esp8266 - ESP32: how to keep a pin high during deep sleep (RTC GPIO pull-ups are too weak)? - Electrical Engineering Stack Exchange
ESP8266 Using GPIO0/GPIO2/GPIO15 Pins : 4 Steps - Instructables
ESP8266 Pinout Reference: Which GPIO pins should you use? | Random Nerd Tutorials
ESP8266 Thing Hookup Guide - SparkFun Learn
Very DeepSleep and energy saving on ESP8266 – Part 6: Power DOWN/UP – Arduino, ESP8266, ESP32 & Raspberry Pi stuff
ESP8266 Pinout Reference: Which GPIO pins should you use? | Random Nerd Tutorials
