ESPLed makes it easy to control Leds on the ESP8226 and ESP32 for use as indicator lights.
Note: This library is no longer actively maintained. Espressif's ESP-IDF for the ESP32 provides a comprehensive set of hardware LED control features to the extent that this library would amount to little more than wrapping that feature set in an Arduino-esque syntax. This may soon be the case for the ESP8266 as Espressif moves towards a similar set of methods for the ESP8266 RTOS SDK.
Brightness Compensation - Led power is set using a percentage from 0 to 100. This value is mapped to a 10 bit PWM value, and adjustments are made for the antilog way in which brightness is perceived by the human eye.
Active Modes - Blinking and pulsing of Leds are handled through the library.
HIGH vs LOW Leds -
Specify whether the Led is turned on by a logic HIGH or LOW and the library will automatically adapt on() an off() functions to compensate