Wednesday, December 9, 2015

ESP01 Blue led stays on all the time

If the blue led on your ESP01 board is ON all the time, it means that you probably connected on LED to it. 

 In this case, LED will act as pull down and the ESP will change the boot mode ( which you didn't want to do it)

 So ESP01 will need GPIO2 on HIGH level in order to boot.

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6 comments:

  1. UnknownFebruary 14, 2016 at 1:29 PM

    do you mean that GPIO2 should be connected to arduino 3.3v ??

    ReplyDelete
    Replies
    1. AnonymousJune 23, 2017 at 10:01 PM

      Through a pull-resistor. 10K should do it.

      Delete
  2. UnknownFebruary 14, 2016 at 1:31 PM

    do you mean that GPIO2 should be connected to arduino 3.3v ??

    ReplyDelete
  3. Catalin B.February 14, 2016 at 5:35 PM

    My ESP modules are not booting with the GPIO2 on LOW

    ReplyDelete
  4. AnonymousJuly 3, 2016 at 1:39 AM

    Yep, that did it. Thanks!!!

    ReplyDelete
  5. AnonymousFebruary 4, 2022 at 10:36 AM

    Does enable also Required pull up? ya, if i am directly connecting enable to 3.3v it will work fine?

    ReplyDelete

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