Comments on: ESP32 Digital Inputs and Digital Outputs (Arduino IDE)

By: Boingbing

Boingbing — Sun, 08 Jun 2025 19:59:16 +0000

In reply to Steve. The seond point. If you press the butten, the wire and also the input connector will be charged to 3.3V. You line will stey chargeg for a long time if you don't use the resistor for discharging.

By: Andreas Spring

Andreas Spring — Fri, 26 Jul 2024 05:03:56 +0000

Hello,
I have a ESP32-DevKitC-32 mounted ESP32-WROOM-32 and tried to use pin 34 as input connected to a button. But because the value read never changed, I later used pin 26 and it worked. Is there something special about that input-only pins?
I used internal pullup and connected the button to GND.

By: Khubaib

Khubaib — Fri, 25 Aug 2023 07:50:48 +0000

In reply to Amit. Yes You should Install Esp32 display Lib from your Ardino IDE Sketch>>LIb>> Include Lib >> and there you can search ESp32 display Lib .

By: Monisha Gowri

Monisha Gowri — Tue, 20 Jun 2023 05:00:41 +0000

which gpio pins work as input during wifi?

By: Sam

Sam — Sun, 08 May 2022 12:18:56 +0000

Can you please show me how to integrate the 2 codes together to use ESP NOW to switch a input from one board to a output of another please even if you can email me the code please. Thanks Sam

By: Abdullah Akilbhai Zabuawala

Abdullah Akilbhai Zabuawala — Thu, 07 Apr 2022 06:15:45 +0000

Hello!
I am trying to connect the IR Transmitter module with the esp32 dev kit module , so when I connect it with TX0 it shows in the mobile camera that radiation passing through it but nothing is receive on the IR receiver module and unfortunately it stops the serial communication. Their some garbage values are printed. And when I connect the signal pin of transmitter to the TX2 pin of the esp32 there is no output.
So will provide the proper solution for it that on which pin is should connect the IR Transmitter so I can get proper output.
I will be waiting for your reply.
Thank you for your support.

By: Sara Santos

Sara Santos — Fri, 18 Feb 2022 22:48:04 +0000

In reply to Martin.

Hi.
You can use them as regular inputs or outputs and also use wi-fi communication.
Regards,
Sara

By: Martin

Martin — Fri, 18 Feb 2022 21:59:46 +0000

In reply to Sara Santos. Hi Sara! Just one question. Can i use GPIO pins witch have ADC2 function as normal digital I/O pins whole the time while esp32 is using wifi or just after on serial i get message client is disconected. For example some of those pin is set to high after "client is disconnected" and not during communication? Or in other words are those pins also not usable as digital I/O while data is send during communication over wifi.

By: Shakil Shaikh

Shakil Shaikh — Sun, 14 Nov 2021 16:14:16 +0000

Hello,
Is there any tutorial to read and write the whole register, instead of one bit at a time I would like to read and write multiple pins at the same time in parallel, thanks in advance.

By: rizki

rizki — Mon, 16 Aug 2021 11:36:07 +0000

In reply to Sara Santos. thanks Sara, at least i knew that's possible