ArduinoJSON : https://github.com/bblanchon/ArduinoJson
WebSocket : https://github.com/Links2004/arduinoWebSockets/tree/master
Preferences(NVS) : https://github.com/vshymanskyy/Preferences
EmonLib : https://github.com/Savjee/EmonLib-esp32
Board Manager : https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_dev_index.json

Board : ESP32 Dev Module
Baud : 921600
CPU Freq. : 240MHz
Flash Freq. : 80MHz
Flash Mode : QIO
Flash Size : 4Mb
Flash Partition : Default 4MB With SPIFFS
PSRAM : Disable
Core Select : 1