ESP8266 Community Forum

- Sun Apr 01, 2018 9:57 am #75059 Hello All,
Can somebody tell me what is significance of blue led.
After power the blue led blinks for 1-2 secs, what does it mean

- Mon Apr 02, 2018 2:18 am #75073 It depends on the application. Usually this means communication on the serial line. The blue LED can be controlled by your program.