supports internal pull-up/pull-down, external pull-up/pull-down

Author: ArduinoGetStarted

README.md

@@ -1,16 +1,17 @@
-## ezButton Library for Arduino
+## ezButton Library for Arduino, ESP32, ESP8266...
 This library is designed to make it easy to use push button, momentary switches, toggle switch, magnetic contact switch (door sensor)..​. It is easy to use for not only beginners but also experienced users.
 
 __ezButton__ stands for __Easy Button__
 
 Features
 ----------------------------
-* Uses the internal pull-up resistor to avoid the floating value
+* Uses the internal pull-up resistor by default to avoid the floating value
 * Supports debounce to eliminate the chattering phenomenon
 * Supports the pressed and released events
 * Supports the counting (for FALLING, RISING and BOTH)
 * Easy to use with multiple buttons
 * All functions are non-blocking 
+* Support internal pull-up/pull-down, external pull-up/pull-down
 
 Available Examples
 ----------------------------

keywords.txt

@@ -28,4 +28,8 @@ resetCount	KEYWORD2
 
 COUNT_FALLING	LITERAL1
 COUNT_RISING	LITERAL1
-COUNT_BOTH	LITERAL1
+COUNT_BOTH	LITERAL1
+INTERNAL_PULLUP	LITERAL1
+INTERNAL_PULLDOWN	LITERAL1
+EXTERNAL_PULLUP	LITERAL1
+EXTERNAL_PULLDOWN	LITERAL1

library.properties

@@ -1,8 +1,8 @@
 name=ezButton
-version=1.0.4
+version=1.0.5
 author=ArduinoGetStarted.com
 maintainer=ArduinoGetStarted.com (ArduinoGetStarted@gmail.com)
-sentence=Button library for Arduino
+sentence=Button library for Arduino, ESP32, ESP8266...
 paragraph=Button library supports debounce, pressed/released events and the press counting. It is easy to use with multiple buttons. The library can be used for push-button, momentary switches, toggle switch, magnetic contact switch (door sensor)... It is designed for not only beginners but also experienced users.
 category=Signal Input/Output
 url=https://arduinogetstarted.com/tutorials/arduino-button-library

src/ezButton.cpp

@@ -31,15 +31,28 @@
 
 #include <ezButton.h>
 
-ezButton::ezButton(int pin): ezButton(pin, INPUT_PULLUP) {};
+ezButton::ezButton(int pin): ezButton(pin, INTERNAL_PULLUP) {};
 
 ezButton::ezButton(int pin, int mode) {
 	btnPin = pin;
 	debounceTime = 0;
 	count = 0;
 	countMode = COUNT_FALLING;
+	
+	if (mode == INTERNAL_PULLUP || mode == INTERNAL_PULLDOWN) {
+		pinMode(btnPin, mode);
+	} else if (mode == EXTERNAL_PULLUP || mode == EXTERNAL_PULLDOWN) {
+		pinMode(btnPin, INPUT);  // External pull-up/pull-down, set as INPUT
+	}
 
-	pinMode(btnPin, mode);
+	// Set the pressed and unpressed states based on the mode
+	if (mode == INTERNAL_PULLDOWN || mode == EXTERNAL_PULLDOWN) {
+		pressedState = HIGH;
+		unpressedState = LOW;
+	} else {
+		pressedState = LOW;
+		unpressedState = HIGH;
+	}
 
 	previousSteadyState = digitalRead(btnPin);
 	lastSteadyState = previousSteadyState;
@@ -61,14 +74,14 @@ int ezButton::getStateRaw(void) {
 }
 
 bool ezButton::isPressed(void) {
-	if(previousSteadyState == HIGH && lastSteadyState == LOW)
+	if(previousSteadyState == unpressedState && lastSteadyState == pressedState)
 		return true;
 	else
 		return false;
 }
 
 bool ezButton::isReleased(void) {
-	if(previousSteadyState == LOW && lastSteadyState == HIGH)
+	if(previousSteadyState == pressedState && lastSteadyState == unpressedState)
 		return true;
 	else
 		return false;

src/ezButton.h

@@ -38,13 +38,21 @@
 #define COUNT_RISING  1
 #define COUNT_BOTH    2
 
+// Constants for button modes
+#define INTERNAL_PULLUP  INPUT_PULLUP
+#define INTERNAL_PULLDOWN INPUT_PULLDOWN
+#define EXTERNAL_PULLUP  2
+#define EXTERNAL_PULLDOWN 3
+
 class ezButton
 {
 	private:
 		int btnPin;
 		unsigned long debounceTime;
 		unsigned long count;
 		int countMode;
+		int pressedState;     // the state when the button is considered pressed
+		int unpressedState;   // the state when the button is considered unpressed
 
 		int previousSteadyState;  // the previous steady state from the input pin, used to detect pressed and released event
 		int lastSteadyState;      // the last steady state from the input pin