migrate from https://cmakerhk.wordpress.com/2018/09/28/brief-notes-on-esp8266-or-esp32/
nodeMCU is a 3rd party of esp8266 with aid circuit.
There are muiltiple ways to use ESP8266:
| Method 1 | ESP8266 AT Bin V1.7.0 - Control AT Mode | This allows you communicate with ESP8266 though USART with AT command, you can find this firmware on ESPRESSIF website |
| Method 2 | nodeMCU Firmware | This Firmware allows you to write Lua Script to run on ESP8266 |
| Method 3 | Arduino IDE | By adding the hardware library to Arduino IDE, this allows you to write code on Arduino IDE, and use the similar syntax on Arduino on ESP8266 |
| Method 4 | Official SDK | It provides two SDK, NONOS SDK, and FreeRTOS SDK, this allows you to write C lang and official API on the ESP8266 chip |
M2, M3, M4 allow you to build standalone ESP8266 program
AT, NONOS, FreeRTOS:
https://www.espressif.com/en/products/hardware/esp8266ex/resources
nodeMCU:
https://github.com/nodemcu/nodemcu-firmware
https://github.com/nodemcu/nodemcu-firmware/blob/master/docs/en/flash.md
Arduino IDE:
https://github.com/esp8266/Arduino
Some information online is quite confusing. With Arduino connecting the ESP8266 but using the Arduino IDE, Some are AT command, Some are using the Arduino IDE hardware library………….
##It is fking hard to find the information online…… I spend a whole month to figure out all the relationship ((( don’t blame me stupid
ESP-Link:
https://github.com/jeelabs/esp-link
https://github.com/arduino-org/Esp-Link