Hi I am using an esp32, due to a lack of available pins, I need to use the same pin for a button that has a built-in LED. The idea is that when I press the button, the LED turns on for a few seconds. After doing some research, I found that certain pins are suitable for this purpose, but I want to m…

Indeed. It would be helpful to know which board. And you say that the button has a built-in LED? Does it also have a built-in LED resistor? If not, then you will need an external current limiting resistor. Perhaps you could provide a link to the board and and the button part you are using?

You can't hurt the board by connecting a PB and/or LED.

[image] cuasitos: need to use the same pin for a button that has a built-in LED This shows how to have a LED and switch on a GPIO at the same time: [image] [image] Share tips you have come across General Electronics Got a request for the code that goes with post …

Sorry the board is an esp32 and I try on pin 21 and works but I don't know for the others pins

Look at a pinout diagram for ESP32. If those other pins are marked as GPIO pins like pin 21 then it should be ok. When connecting a button and led to the same pin, if the led remains lit for some time, it will not be possible to read the pin to detect if the button is still pressed or has been pres…

[image] PaulRB: are resistors R7-12 necessary? They probably prevent problems in case the GPIOs are accidentally configured as high outputs.

[image] LarryD: This shows how to have a LED and switch on a GPIO at the same time But, as long as the buttons are pressed, the LEDs remain on. It depends on whether this is acceptable. It's crucial to understand how OP's "button that has a built-in LED" is wired.

[image] Claudio_FF: in case the GPIOs are accidentally configured as high Possibly. But we normally recommend to connect an ordinary button (without an LED) from the Arduino pin to ground, with no resistor, without much concern that the pin might be accidentally configured as high. With thes…

Yes, this precaution can save a lot of headaches, especially for beginners who regularly connect LEDs without a resistor :roll_eyes: Somewhere, they even recommend always putting a resistor in series with a GPIO.

Uing the fllowing pins with a button with an incorporated led?

Projects General Guidance

LarryD May 24, 2025, 11:49pm 5

This shows how to have a LED and switch on a GPIO at the same time:

image1380×952 186 KB

Topic		Replies	Views
Wiring assistance required for 4 pin LED button General Guidance	6	706	November 11, 2023
Button with Integrated LED - Dim Light When Off General Guidance	5	151	February 14, 2025
Trying to turn a led on with a button, when my hand gets close to the board it behaves erratically 3rd Party Boards	4	147	November 11, 2024
Why is my primary LED not turning off when I push my button? Programming	7	135	October 30, 2025
ESP32 toggle LEDs using assigned buttons Programming	12	562	May 9, 2024

Uing the fllowing pins with a button with an incorporated led?

Related topics