ESP8266 Knowledge Base

ESP8266 Wifi Modes

https://42bots.com/tutorials/esp8266-wifi-tutorial-arduino-ide/

ESP8266 as access point

https://arduino.stackexchange.com/questions/18176/peer-to-peer-communication

Hardware Guide

https://tttapa.github.io/ESP8266/Chap04%20-%20Microcontroller.html

ESP8266 Internals Guide

Reset Reasons

reset causes:
    0: 
    1: normal boot
    2: reset pin
    3: software reset
    4: watchdog reset

boot device:
    0:
    1: ram
    3: flash

See Here for more details

Information on the Watchdog itself

Additional Information on the Watchdog Here

ESP32

Wemos Lolin ESP32 Specs and pinouts

Guide to GPIO Pins