Hi all,
I've done quite a bit in Arduino over the years however this is my first attempt at ESP8266 modules.
I have the following script working fine on standard Arduino hardware, however once it's loaded up on an NodeMCU ESP8266 module it doesn't work. LED is always HIGH, nothing outputs to serial monitor and button obviously doesn't do anything. It compiles and uploads fine, just doesn't run as expected.
I'm aware of the usable pins on the ESP, the labeled pin and their respective GPIO number however still nothing.
I assume it's something silly I'm doing wrong, and any assistance is appreciated.
Cheers
Adam
// this constant won't change:
const int buttonPin = 5; // the pin that the pushbutton is attached to
const int ledPin = 4; // the pin that the LED is attached to
// Variables will change:
int buttonPushCounter = 0; // counter for the number of button presses
int buttonState = 0; // current state of the button
int lastButtonState = 0; // previous state of the button
void setup() {
// initialize the button pin as a input:
pinMode(buttonPin, INPUT);
// initialize the LED as an output:
pinMode(ledPin, OUTPUT);
// initialize serial communication:
delay(2000);
Serial.begin(115200);
delay(2000);
}
void loop() {
// read the pushbutton input pin:
buttonState = digitalRead(buttonPin);
// compare the buttonState to its previous state
if (buttonState != lastButtonState) {
// if the state has changed, increment the counter
if (buttonState == HIGH) {
// if the current state is HIGH then the button went from off to on:
buttonPushCounter++;
Serial.println("on");
Serial.print("number of button pushes: ");
Serial.println(buttonPushCounter);
} else {
// if the current state is LOW then the button went from on to off:
Serial.println("off");
}
// Delay a little bit to avoid bouncing
delay(100);
}
// save the current state as the last state, for next time through the loop
lastButtonState = buttonState;
// turns on the LED every second button press by checking the modulo of the
// button push counter. the modulo function gives you the remainder of the
// division of two numbers:
if (buttonPushCounter % 2 == 0) {
digitalWrite(ledPin, HIGH);
} else {
digitalWrite(ledPin, LOW);
}
}
