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Answered What do LED colors and flashes mean at USB side?

Discussion in 'General Questions' started by joea, Nov 16, 2019.

  1. joea

    joea Member

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    From time to time I see Red or Green LED flashes at the USB connector port.

    What do they signify?
     
  2. Geof

    Geof Volunteer Moderator
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    Communication - normal :)
     
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  3. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    They are the LEDs from the Arduino.

    Red is normally power and green is just (by default) an activity LED*. I can't recall if Marlin uses them in some other way, but it is normal to see them blinking.


    *Robo used Chinese clone mega boards and some of those used different colors so Red might be activity and Green power.
     

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