esp8266

https://www.espressif.com/en/support/download/sdks-demos?keys=&field_type_tid%5B%5D=14

https://github.com/me-no-dev/ESPAsyncWebServer/tree/master https://github.com/me-no-dev/ESPAsyncTCP/tree/master https://github.com/lwip-tcpip/lwip

https://github.com/FastLED/FastLED

https://www.nongnu.org/lwip/2_1_x/group__lwip__nosys.html https://forum.arduino.cc/t/why-there-is-no-main-function/284675/2

https://docs.espressif.com/projects/esp8266-rtos-sdk/en/latest/get-started/index.html https://blog.3mdeb.com/2019/2019-07-24-esp8266-quick-guide-for-embedded-c-developers/