I have a nodemcu esp8266 12E board. It's working properly, but whenever I reset it, it prints random characters like ??I%^, even if hasn't a code uploaded in it.

  • 3
    Yes. That's normal. Set the baud to 74880 (iirc) and you will see what they say. – Majenko Jul 31 '20 at 10:33

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