i have a nodeMCU v3(esp8266) and what i want is: when i send DC 5v or 3v to a pin=D1 (idk if its possible to send 5v directly to pin) then to activate the D0 for 20Seconds

like this:

 if (D1==Sends signal){
    digitalWrite(pinD0, HIGH);
      delay(20000);  //pinD0 is active for 20 seconds

     digitalWrite(pinD0, LOW);

  • you can connect 5v to the gpio through a red LED or a level shifter, then just use digitalRead() – dandavis Apr 25 '19 at 20:05
  • 1
    my question is: if i can ping a D0 pin from another device and nodemcu to activate D1 pin for 20 seconds if recived ping(signal) in pin D0 – user56171 Apr 25 '19 at 20:06

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