Re: NodeMCU - running arduino - User Button
Posted: Thu Jun 25, 2015 11:53 amMaybe the board itself has a pullup ? because otherwise, this switch will be useless ...
Seems a bit useless to me at the moment.
Chris
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NodeMCU - running arduino - User Button
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Posted: Thu Jun 25, 2015 11:53 amRe: NodeMCU - running arduino - User Button
Posted: Thu Jun 25, 2015 1:51 pmRe: NodeMCU - running arduino - User Button
Posted: Sun Jul 26, 2015 9:04 pmI was having trouble with this too. Driving the pin high in OUTPUT mode for a moment seems to fix it.
e.g.,
e.g.,
Code: Select all
if (digitalRead(16)==0) {
// do stuff...
pinMode(16,OUTPUT);
digitalWrite(16,HIGH);
delay(1);
pinMode(16,INPUT);
Re: NodeMCU - running arduino - User Button
Posted: Mon Jul 27, 2015 1:56 amThe button is definitely useful - just need to pull it up whenever you use it. Here's an example that controls the LED onboard the ESP8266. As a side effect, the LED attached to pin 16 (the LED next to the user button) also lights up whenever the button is pressed.
Code: Select all
const int buttonPin = 16;
const int ledPin = 1;
void setup() {
pinMode(buttonPin, INPUT);
pinMode(ledPin, OUTPUT);
}
void loop() {
if (digitalRead(buttonPin) == HIGH)
{
digitalWrite(ledPin, HIGH);
}
else
{
digitalWrite(ledPin, LOW);
pinMode(buttonPin, OUTPUT);
digitalWrite(buttonPin, HIGH);
pinMode(buttonPin, INPUT);
}
}