Library does not support buttons with pull down resistors

[divinofire]

I have a working project, it's stressful and error-prone for me to open it and change the button connection with a pull-down resistor to a pull-up resistor. I would like to just program the buttons to support debounce through the programming interface without modifying the hardware.

[ArduinoGetStarted]

Dear Divino-Fire,
The library has not supported pull-down resistor yet. We planed to add it in the next release. But we have not had a specific release date yet.

[homonto]

I am 100% for inverted buttons as well to be added. Btw I am an electrician with hundred years of experience, and since I was in school, the ON was always when something is HIGH, so I always design my projects to be LOW = OFF, HIGH = ON.
Anyway, free software so nothing to complain about ;-)

[ArduinoGetStarted]

Dear @homonto
Me too, I like to design like that. But parts of the world does not like that. I think that is why the concepts "Low trigger", "High trigger", "Normally Open", "Normally Closed" appears

[jimtran93]

HI @ArduinoGetStarted! Just wondering if the library has been updated to support pull-down resistors. I am trying to use this on the Adafruit ESP32-S2 Reverse TFT that has two buttons that are normally low, and one button that is normally high.

[hselomein]

Hi I am also wondering if there is pulldown support yet. I hac a project that uses 3 buttons in a pulldown configuration. in 3 GPIOs that do not have internal pull up or down resistors

[ArduinoGetStarted]

Hello, Thank you for your interest in the ezButton library. Unfortunately, until now, I still have no time to update it to support the pulldown. I am sorry for this inconvenience! Have a nice day! Best regards.

…

On Tue, Nov 28, 2023 at 2:28 PM hselomein ***@***.***> wrote: Hi I am also wondering if there is pulldown support yet. I hac a project that uses 3 buttons in a pulldown configuration. in 3 GPIOs that do not have internal pull up or down resistors — Reply to this email directly, view it on GitHub <#7 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ANZMLXDRHCJGMTYMZDFILYDYGVZBRAVCNFSM5DVY4KCKU5DIOJSWCZC7NNSXTN2JONZXKZKDN5WW2ZLOOQ5TCOBSHEYTGMJXGUZQ> . You are receiving this because you were mentioned.Message ID: ***@***.***>

[homonto]

Hi I am also wondering if there is pulldown support yet. I hac a project that uses 3 buttons in a pulldown configuration. in 3 GPIOs that do not have internal pull up or down resistors

hi @hselomein
use this one: spacehuhn/SimpleButton - it has full config including pullup and down

[drf5n]

If you use pulldown resistors, you can make use of these bits:

button/src/ezButton.h

Line 57 in 2b2d120

ezButton(int pin, int mode);

button/src/ezButton.cpp

Lines 34 to 43 in 2b2d120

	ezButton::ezButton(int pin): ezButton(pin, INPUT_PULLUP) {};
	ezButton::ezButton(int pin, int mode) {
	btnPin = pin;
	debounceTime = 0;
	count = 0;
	countMode = COUNT_FALLING;
	pinMode(btnPin, mode);

and write:

ezButton button(7,INPUT); // rely on external pulldown resistor

or if you are on a device with INPUT_PULLDOWN you can:

ezButton button(7,INPUT_PULLDOWN); // use internal pulldown resistor